Missing pieces of new bus.h that CVS lost behind my back

33 files changed, 1459 insertions, 1251 deletions

diff --git a/sys/dev/ic/com.c b/sys/dev/ic/com.c
index 7c06bfbed0e..81b15473c45 100644
--- a/sys/dev/ic/com.c
+++ b/sys/dev/ic/com.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: com.c,v 1.27 1996/11/12 20:30:27 niklas Exp $	*/
+/*	$OpenBSD: com.c,v 1.28 1996/11/29 22:54:52 niklas Exp $	*/
 /*	$NetBSD: com.c,v 1.82.4.1 1996/06/02 09:08:00 mrg Exp $	*/
 
 /*-
@@ -57,7 +57,7 @@
 #include <sys/types.h>
 #include <sys/device.h>
 
-#include <machine/bus.old.h>
+#include <machine/bus.h>
 #include <machine/intr.h>
 
 #include <dev/isa/isavar.h>
@@ -78,7 +78,7 @@
 struct com_softc {
 	struct device sc_dev;
 	void *sc_ih;
-	bus_chipset_tag_t sc_bc;
+	bus_space_tag_t sc_iot;
 	struct tty *sc_tty;
 
 	int sc_overflows;
@@ -92,8 +92,9 @@ struct com_softc {
 	int sc_hayespbase;
 #endif
 
-	bus_io_handle_t sc_ioh;
-	bus_io_handle_t sc_hayespioh;
+	bus_space_handle_t sc_ioh;
+	bus_space_handle_t sc_hayespioh;
+	isa_chipset_tag_t sc_ic;
 
 	u_char sc_hwflags;
 #define	COM_HW_NOIEN	0x01
@@ -120,7 +121,7 @@ struct com_softc {
 };
 
 #ifdef COM_HAYESP
-int comprobeHAYESP __P((bus_io_handle_t hayespioh, struct com_softc *sc));
+int comprobeHAYESP __P((bus_space_handle_t hayespioh, struct com_softc *sc));
 #endif
 void	comdiag		__P((void *));
 int	comspeed	__P((long));
@@ -162,6 +163,15 @@ struct cfattach com_commulti_ca = {
 };
 #endif
 
+#if NCOM_PICA
+#undef  CONADDR         /* This is stupid but using devs before config .. */
+#define CONADDR 0xe0006000
+
+struct cfattach com_pica_ca = {
+	sizeof(struct com_softc), comprobe, comattach
+};
+#endif
+
 struct cfdriver com_cd = {
 	NULL, "com", DV_TTY
 };
@@ -178,8 +188,8 @@ int	comdefaultrate = TTYDEF_SPEED;
 int	comconsaddr;
 int	comconsinit;
 int	comconsattached;
-bus_chipset_tag_t comconsbc;
-bus_io_handle_t comconsioh;
+bus_space_tag_t comconsiot;
+bus_space_handle_t comconsioh;
 tcflag_t comconscflag = TTYDEF_CFLAG;
 
 int	commajor;
@@ -294,6 +304,7 @@ com_pcmcia_isa_attach(parent, match, aux, pc_link)
 				(sc->sc_hwflags & (COM_HW_ABSENT_PENDING|COM_HW_CONSOLE));
 		} else
 			sc->sc_hwflags = 0;
+		sc->sc_ic = ia->ia_ic;
 	}
 	return rval;
 }
@@ -339,7 +350,7 @@ com_pcmcia_remove(pc_link, self)
 		ttyfree(sc->sc_tty);
 		sc->sc_tty = NULL;
     ok:
-		isa_intr_disestablish(sc->sc_bc, sc->sc_ih);
+		isa_intr_disestablish(sc->sc_ic, sc->sc_ih);
 		sc->sc_ih = NULL;
 		SET(sc->sc_hwflags, COM_HW_ABSENT);
 		return 0;		/* OK! */
@@ -420,20 +431,20 @@ comspeed(speed)
 }
 
 int
-comprobe1(bc, ioh, iobase)
-	bus_chipset_tag_t bc;
-	bus_io_handle_t ioh;
+comprobe1(iot, ioh, iobase)
+	bus_space_tag_t iot;
+	bus_space_handle_t ioh;
 	int iobase;
 {
 	int i, k;
 
 	/* force access to id reg */
-	bus_io_write_1(bc, ioh, com_lcr, 0);
-	bus_io_write_1(bc, ioh, com_iir, 0);
+	bus_space_write_1(iot, ioh, com_lcr, 0);
+	bus_space_write_1(iot, ioh, com_iir, 0);
 	for (i = 0; i < 32; i++) {
-	    k = bus_io_read_1(bc, ioh, com_iir);
+	    k = bus_space_read_1(iot, ioh, com_iir);
 	    if (k & 0x38) {
-		bus_io_read_1(bc, ioh, com_data); /* cleanup */
+		bus_space_read_1(iot, ioh, com_data); /* cleanup */
 	    } else
 		break;
 	}
@@ -446,12 +457,12 @@ comprobe1(bc, ioh, iobase)
 #ifdef COM_HAYESP
 int
 comprobeHAYESP(hayespioh, sc)
-	bus_io_handle_t hayespioh;
+	bus_space_handle_t hayespioh;
 	struct com_softc *sc;
 {
 	char	val, dips;
 	int	combaselist[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 };
-	bus_chipset_tag_t bc = sc->sc_bc;
+	bus_space_tag_t iot = sc->sc_iot;
 
 	/*
 	 * Hayes ESP cards have two iobases.  One is for compatibility with
@@ -461,7 +472,7 @@ comprobeHAYESP(hayespioh, sc)
 	 */
 
 	/* Test for ESP signature */
-	if ((bus_io_read_1(bc, hayespioh, 0) & 0xf3) == 0)
+	if ((bus_space_read_1(iot, hayespioh, 0) & 0xf3) == 0)
 		return 0;
 
 	/*
@@ -469,8 +480,8 @@ comprobeHAYESP(hayespioh, sc)
 	 */
 
 	/* Get the dip-switch configurations */
-	bus_io_write_1(bc, hayespioh, HAYESP_CMD1, HAYESP_GETDIPS);
-	dips = bus_io_read_1(bc, hayespioh, HAYESP_STATUS1);
+	bus_space_write_1(iot, hayespioh, HAYESP_CMD1, HAYESP_GETDIPS);
+	dips = bus_space_read_1(iot, hayespioh, HAYESP_STATUS1);
 
 	/* Determine which com port this ESP card services: bits 0,1 of  */
 	/*  dips is the port # (0-3); combaselist[val] is the com_iobase */
@@ -481,9 +492,9 @@ comprobeHAYESP(hayespioh, sc)
 
  	/* Check ESP Self Test bits. */
 	/* Check for ESP version 2.0: bits 4,5,6 == 010 */
-	bus_io_write_1(bc, hayespioh, HAYESP_CMD1, HAYESP_GETTEST);
-	val = bus_io_read_1(bc, hayespioh, HAYESP_STATUS1); /* Clear reg 1 */
-	val = bus_io_read_1(bc, hayespioh, HAYESP_STATUS2);
+	bus_space_write_1(iot, hayespioh, HAYESP_CMD1, HAYESP_GETTEST);
+	val = bus_space_read_1(iot, hayespioh, HAYESP_STATUS1); /* Clear reg 1 */
+	val = bus_space_read_1(iot, hayespioh, HAYESP_STATUS2);
 	if ((val & 0x70) < 0x20) {
 		printf("-old (%o)", val & 0x70);
 		/* we do not support the necessary features */
@@ -513,8 +524,8 @@ comprobe(parent, match, aux)
 	struct device *parent;
 	void *match, *aux;
 {
-	bus_chipset_tag_t bc;
-	bus_io_handle_t ioh;
+	bus_space_tag_t iot;
+	bus_space_handle_t ioh;
 	int iobase, needioh;
 	int rv = 1;
 
@@ -526,6 +537,10 @@ comprobe(parent, match, aux)
 #define IS_ISA(parent) \
 	!strcmp((parent)->dv_cfdata->cf_driver->cd_name, "isa")
 #endif
+#if NCOM_PICA
+#define IS_PICA(parent) \
+	!strcmp((parent)->dv_cfdata->cf_driver->cd_name, "pica")
+#endif
 	/*
 	 * XXX should be broken out into functions for isa probe and
 	 * XXX for commulti probe, with a helper function that contains
@@ -535,7 +550,7 @@ comprobe(parent, match, aux)
 	if (IS_ISA(parent)) {
 		struct isa_attach_args *ia = aux;
 
-		bc = ia->ia_bc;
+		iot = ia->ia_iot;
 		iobase = ia->ia_iobase;
 		needioh = 1;
 	} else
@@ -548,25 +563,35 @@ comprobe(parent, match, aux)
 		if (cf->cf_loc[0] != -1 && cf->cf_loc[0] != ca->ca_slave)
 			return (0);
 
-		bc = ca->ca_bc;
+		iot = ca->ca_iot;
 		iobase = ca->ca_iobase;
 		ioh = ca->ca_ioh;
 		needioh = 0;
 	} else
 #endif
+#if NCOM_PICA
+	if(IS_PICA(parent)) {
+		struct confargs *ca = aux;
+		if(!BUS_MATCHNAME(ca, "com"))
+			return(0);
+		iobase = (long)BUS_CVTADDR(ca);
+		iot = 0;
+		needioh = 1;
+	} else
+#endif
 		return(0);			/* This cannot happen */
 
 	/* if it's in use as console, it's there. */
 	if (iobase == comconsaddr && !comconsattached)
 		goto out;
 
-	if (needioh && bus_io_map(bc, iobase, COM_NPORTS, &ioh)) {
+	if (needioh && bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
 		rv = 0;
 		goto out;
 	}
-	rv = comprobe1(bc, ioh, iobase);
+	rv = comprobe1(iot, ioh, iobase);
 	if (needioh)
-		bus_io_unmap(bc, ioh, COM_NPORTS);
+		bus_space_unmap(iot, ioh, COM_NPORTS);
 
 out:
 #if NCOM_ISA || NCOM_PCMCIA
@@ -587,8 +612,8 @@ comattach(parent, self, aux)
 {
 	struct com_softc *sc = (void *)self;
 	int iobase, irq;
-	bus_chipset_tag_t bc;
-	bus_io_handle_t ioh;
+	bus_space_tag_t iot;
+	bus_space_handle_t ioh;
 #ifdef COM_HAYESP
 	int	hayesp_ports[] = { 0x140, 0x180, 0x280, 0x300, 0 };
 	int	*hayespp;
@@ -615,9 +640,9 @@ comattach(parent, self, aux)
 		 * We're living on an isa.
 		 */
 		iobase = ia->ia_iobase;
-		bc = ia->ia_bc;
+		iot = ia->ia_iot;
 	        if (iobase != comconsaddr) {
-	                if (bus_io_map(bc, iobase, COM_NPORTS, &ioh))
+	                if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh))
 				panic("comattach: io mapping failed");
 		} else
 	                ioh = comconsioh;
@@ -632,7 +657,7 @@ comattach(parent, self, aux)
 		 * We're living on a commulti.
 		 */
 		iobase = ca->ca_iobase;
-		bc = ca->ca_bc;
+		iot = ca->ca_iot;
 		ioh = ca->ca_ioh;
 		irq = IRQUNK;
 
@@ -640,9 +665,18 @@ comattach(parent, self, aux)
 			SET(sc->sc_hwflags, COM_HW_NOIEN);
 	} else
 #endif
+#if NCOM_PICA
+	if(IS_PICA(parent)) {
+		struct confargs *ca = aux;
+		iobase = (long)BUS_CVTADDR(ca);
+		iot = 0;
+		irq = 0;
+		ioh = iobase;
+	} else
+#endif
 		panic("comattach: impossible");
 
-	sc->sc_bc = bc;
+	sc->sc_iot = iot;
 	sc->sc_ioh = ioh;
 	sc->sc_iobase = iobase;
 
@@ -662,29 +696,29 @@ comattach(parent, self, aux)
 #ifdef COM_HAYESP
 	/* Look for a Hayes ESP board. */
 	for (hayespp = hayesp_ports; *hayespp != 0; hayespp++) {
-		bus_io_handle_t hayespioh;
+		bus_space_handle_t hayespioh;
 
 #define	HAYESP_NPORTS	8			/* XXX XXX XXX ??? ??? ??? */
-		if (bus_io_map(bc, *hayespp, HAYESP_NPORTS, &hayespioh))
+		if (bus_space_map(iot, *hayespp, HAYESP_NPORTS, 0, &hayespioh))
 			continue;
 		if (comprobeHAYESP(hayespioh, sc)) {
 			sc->sc_hayespbase = *hayespp;
 			sc->sc_hayespioh = hayespioh;
 			break;
 		}
-		bus_io_unmap(bc, hayespioh, HAYESP_NPORTS);
+		bus_space_unmap(iot, hayespioh, HAYESP_NPORTS);
 	}
 	/* No ESP; look for other things. */
 	if (*hayespp == 0) {
 #endif
 
 	/* look for a NS 16550AF UART with FIFOs */
-	bus_io_write_1(bc, ioh, com_fifo,
+	bus_space_write_1(iot, ioh, com_fifo,
 	    FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | FIFO_TRIGGER_14);
 	delay(100);
-	if (ISSET(bus_io_read_1(bc, ioh, com_iir), IIR_FIFO_MASK) ==
+	if (ISSET(bus_space_read_1(iot, ioh, com_iir), IIR_FIFO_MASK) ==
 	    IIR_FIFO_MASK)
-		if (ISSET(bus_io_read_1(bc, ioh, com_fifo), FIFO_TRIGGER_14) ==
+		if (ISSET(bus_space_read_1(iot, ioh, com_fifo), FIFO_TRIGGER_14) ==
 		    FIFO_TRIGGER_14) {
 			SET(sc->sc_hwflags, COM_HW_FIFO);
 			printf(": ns16550a, working fifo\n");
@@ -692,14 +726,14 @@ comattach(parent, self, aux)
 			printf(": ns16550, broken fifo\n");
 	else
 		printf(": ns8250 or ns16450, no fifo\n");
-	bus_io_write_1(bc, ioh, com_fifo, 0);
+	bus_space_write_1(iot, ioh, com_fifo, 0);
 #ifdef COM_HAYESP
 	}
 #endif
 
 	/* disable interrupts */
-	bus_io_write_1(bc, ioh, com_ier, 0);
-	bus_io_write_1(bc, ioh, com_mcr, 0);
+	bus_space_write_1(iot, ioh, com_ier, 0);
+	bus_space_write_1(iot, ioh, com_mcr, 0);
 
 	if (irq != IRQUNK) {
 #if NCOM_ISA || NCOM_PCMCIA
@@ -711,6 +745,12 @@ comattach(parent, self, aux)
 			    sc->sc_dev.dv_xname);
 		} else
 #endif
+#if NCOM_PICA
+		if (IS_PICA(parent)) {
+			struct confargs *ca = aux;
+			BUS_INTR_ESTABLISH(ca, comintr, (void *)(long)sc);
+		} else
+#endif
 			panic("comattach: IRQ but can't have one");
 	}
 
@@ -719,7 +759,7 @@ comattach(parent, self, aux)
 		if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE))
 			kgdb_dev = -1;	/* can't debug over console port */
 		else {
-			cominit(bc, ioh, kgdb_rate);
+			cominit(iot, ioh, kgdb_rate);
 			if (kgdb_debug_init) {
 				/*
 				 * Print prefix of device name,
@@ -747,8 +787,8 @@ comopen(dev, flag, mode, p)
 {
 	int unit = DEVUNIT(dev);
 	struct com_softc *sc;
-	bus_chipset_tag_t bc;
-	bus_io_handle_t ioh;
+	bus_space_tag_t iot;
+	bus_space_handle_t ioh;
 	struct tty *tp;
 	int s;
 	int error = 0;
@@ -801,37 +841,37 @@ comopen(dev, flag, mode, p)
 		sc->sc_ibufhigh = sc->sc_ibuf + COM_IHIGHWATER;
 		sc->sc_ibufend = sc->sc_ibuf + COM_IBUFSIZE;
 
-		bc = sc->sc_bc;
+		iot = sc->sc_iot;
 		ioh = sc->sc_ioh;
 #ifdef COM_HAYESP
 		/* Setup the ESP board */
 		if (ISSET(sc->sc_hwflags, COM_HW_HAYESP)) {
-			bus_io_handle_t hayespioh = sc->sc_hayespioh;
+			bus_space_handle_t hayespioh = sc->sc_hayespioh;
 
-			bus_io_write_1(bc, ioh, com_fifo,
+			bus_space_write_1(iot, ioh, com_fifo,
 			     FIFO_DMA_MODE|FIFO_ENABLE|
 			     FIFO_RCV_RST|FIFO_XMT_RST|FIFO_TRIGGER_8);
 
 			/* Set 16550 compatibility mode */
-			bus_io_write_1(bc, hayespioh, HAYESP_CMD1, HAYESP_SETMODE);
-			bus_io_write_1(bc, hayespioh, HAYESP_CMD2, 
+			bus_space_write_1(iot, hayespioh, HAYESP_CMD1, HAYESP_SETMODE);
+			bus_space_write_1(iot, hayespioh, HAYESP_CMD2, 
 			     HAYESP_MODE_FIFO|HAYESP_MODE_RTS|
 			     HAYESP_MODE_SCALE);
 
 			/* Set RTS/CTS flow control */
-			bus_io_write_1(bc, hayespioh, HAYESP_CMD1, HAYESP_SETFLOWTYPE);
-			bus_io_write_1(bc, hayespioh, HAYESP_CMD2, HAYESP_FLOW_RTS);
-			bus_io_write_1(bc, hayespioh, HAYESP_CMD2, HAYESP_FLOW_CTS);
+			bus_space_write_1(iot, hayespioh, HAYESP_CMD1, HAYESP_SETFLOWTYPE);
+			bus_space_write_1(iot, hayespioh, HAYESP_CMD2, HAYESP_FLOW_RTS);
+			bus_space_write_1(iot, hayespioh, HAYESP_CMD2, HAYESP_FLOW_CTS);
 
 			/* Set flow control levels */
-			bus_io_write_1(bc, hayespioh, HAYESP_CMD1, HAYESP_SETRXFLOW);
-			bus_io_write_1(bc, hayespioh, HAYESP_CMD2, 
+			bus_space_write_1(iot, hayespioh, HAYESP_CMD1, HAYESP_SETRXFLOW);
+			bus_space_write_1(iot, hayespioh, HAYESP_CMD2, 
 			     HAYESP_HIBYTE(HAYESP_RXHIWMARK));
-			bus_io_write_1(bc, hayespioh, HAYESP_CMD2,
+			bus_space_write_1(iot, hayespioh, HAYESP_CMD2,
 			     HAYESP_LOBYTE(HAYESP_RXHIWMARK));
-			bus_io_write_1(bc, hayespioh, HAYESP_CMD2,
+			bus_space_write_1(iot, hayespioh, HAYESP_CMD2,
 			     HAYESP_HIBYTE(HAYESP_RXLOWMARK));
-			bus_io_write_1(bc, hayespioh, HAYESP_CMD2,
+			bus_space_write_1(iot, hayespioh, HAYESP_CMD2,
 			     HAYESP_LOBYTE(HAYESP_RXLOWMARK));
 		} else
 #endif
@@ -848,32 +888,32 @@ comopen(dev, flag, mode, p)
 			 * Set the FIFO threshold based on the receive speed.
 			 */
 			for (;;) {
-			 	bus_io_write_1(bc, ioh, com_fifo, 0);
+			 	bus_space_write_1(iot, ioh, com_fifo, 0);
 				delay(100);
-				(void) bus_io_read_1(bc, ioh, com_data);
-				bus_io_write_1(bc, ioh, com_fifo,
+				(void) bus_space_read_1(iot, ioh, com_data);
+				bus_space_write_1(iot, ioh, com_fifo,
 				    FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST |
 				    (tp->t_ispeed <= 1200 ?
 				    FIFO_TRIGGER_1 : FIFO_TRIGGER_8));
 				delay(100);
-				if(!ISSET(bus_io_read_1(bc, ioh,
+				if(!ISSET(bus_space_read_1(iot, ioh,
 				    com_lsr), LSR_RXRDY))
 				    	break;
 			}
 		}
 
 		/* flush any pending I/O */
-		while (ISSET(bus_io_read_1(bc, ioh, com_lsr), LSR_RXRDY))
-			(void) bus_io_read_1(bc, ioh, com_data);
+		while (ISSET(bus_space_read_1(iot, ioh, com_lsr), LSR_RXRDY))
+			(void) bus_space_read_1(iot, ioh, com_data);
 		/* you turn me on, baby */
 		sc->sc_mcr = MCR_DTR | MCR_RTS;
 		if (!ISSET(sc->sc_hwflags, COM_HW_NOIEN))
 			SET(sc->sc_mcr, MCR_IENABLE);
-		bus_io_write_1(bc, ioh, com_mcr, sc->sc_mcr);
+		bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr);
 		sc->sc_ier = IER_ERXRDY | IER_ERLS | IER_EMSC;
-		bus_io_write_1(bc, ioh, com_ier, sc->sc_ier);
+		bus_space_write_1(iot, ioh, com_ier, sc->sc_ier);
 
-		sc->sc_msr = bus_io_read_1(bc, ioh, com_msr);
+		sc->sc_msr = bus_space_read_1(iot, ioh, com_msr);
 		if (ISSET(sc->sc_swflags, COM_SW_SOFTCAR) || DEVCUA(dev) ||
 		    ISSET(sc->sc_msr, MSR_DCD) || ISSET(tp->t_cflag, MDMBUF))
 			SET(tp->t_state, TS_CARR_ON);
@@ -931,8 +971,8 @@ comclose(dev, flag, mode, p)
 	int unit = DEVUNIT(dev);
 	struct com_softc *sc = com_cd.cd_devs[unit];
 	struct tty *tp = sc->sc_tty;
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_io_handle_t ioh = sc->sc_ioh;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
 	int s;
 
 	/* XXX This is for cons.c. */
@@ -944,12 +984,12 @@ comclose(dev, flag, mode, p)
 	if (!ISSET(sc->sc_hwflags, COM_HW_ABSENT|COM_HW_ABSENT_PENDING)) {
 		/* can't do any of this stuff .... */
 		CLR(sc->sc_lcr, LCR_SBREAK);
-		bus_io_write_1(bc, ioh, com_lcr, sc->sc_lcr);
-		bus_io_write_1(bc, ioh, com_ier, 0);
+		bus_space_write_1(iot, ioh, com_lcr, sc->sc_lcr);
+		bus_space_write_1(iot, ioh, com_ier, 0);
 		if (ISSET(tp->t_cflag, HUPCL) &&
 		    !ISSET(sc->sc_swflags, COM_SW_SOFTCAR)) {
 			/* XXX perhaps only clear DTR */
-			bus_io_write_1(bc, ioh, com_mcr, 0);
+			bus_space_write_1(iot, ioh, com_mcr, 0);
 		}
 	}
 	CLR(tp->t_state, TS_BUSY | TS_FLUSH);
@@ -1047,8 +1087,8 @@ comioctl(dev, cmd, data, flag, p)
 	int unit = DEVUNIT(dev);
 	struct com_softc *sc = com_cd.cd_devs[unit];
 	struct tty *tp = sc->sc_tty;
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_io_handle_t ioh = sc->sc_ioh;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
 	int error;
 
 	if (ISSET(sc->sc_hwflags, COM_HW_ABSENT|COM_HW_ABSENT_PENDING)) {
@@ -1068,29 +1108,29 @@ comioctl(dev, cmd, data, flag, p)
 	switch (cmd) {
 	case TIOCSBRK:
 		SET(sc->sc_lcr, LCR_SBREAK);
-		bus_io_write_1(bc, ioh, com_lcr, sc->sc_lcr);
+		bus_space_write_1(iot, ioh, com_lcr, sc->sc_lcr);
 		break;
 	case TIOCCBRK:
 		CLR(sc->sc_lcr, LCR_SBREAK);
-		bus_io_write_1(bc, ioh, com_lcr, sc->sc_lcr);
+		bus_space_write_1(iot, ioh, com_lcr, sc->sc_lcr);
 		break;
 	case TIOCSDTR:
 		SET(sc->sc_mcr, sc->sc_dtr);
-		bus_io_write_1(bc, ioh, com_mcr, sc->sc_mcr);
+		bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr);
 		break;
 	case TIOCCDTR:
 		CLR(sc->sc_mcr, sc->sc_dtr);
-		bus_io_write_1(bc, ioh, com_mcr, sc->sc_mcr);
+		bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr);
 		break;
 	case TIOCMSET:
 		CLR(sc->sc_mcr, MCR_DTR | MCR_RTS);
 	case TIOCMBIS:
 		SET(sc->sc_mcr, tiocm_xxx2mcr(*(int *)data));
-		bus_io_write_1(bc, ioh, com_mcr, sc->sc_mcr);
+		bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr);
 		break;
 	case TIOCMBIC:
 		CLR(sc->sc_mcr, tiocm_xxx2mcr(*(int *)data));
-		bus_io_write_1(bc, ioh, com_mcr, sc->sc_mcr);
+		bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr);
 		break;
 	case TIOCMGET: {
 		u_char m;
@@ -1110,7 +1150,7 @@ comioctl(dev, cmd, data, flag, p)
 			SET(bits, TIOCM_DSR);
 		if (ISSET(m, MSR_RI | MSR_TERI))
 			SET(bits, TIOCM_RI);
-		if (bus_io_read_1(bc, ioh, com_ier))
+		if (bus_space_read_1(iot, ioh, com_ier))
 			SET(bits, TIOCM_LE);
 		*(int *)data = bits;
 		break;
@@ -1165,8 +1205,8 @@ comparam(tp, t)
 	struct termios *t;
 {
 	struct com_softc *sc = com_cd.cd_devs[DEVUNIT(tp->t_dev)];
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_io_handle_t ioh = sc->sc_ioh;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
 	int ospeed = comspeed(t->c_ospeed);
 	u_char lcr;
 	tcflag_t oldcflag;
@@ -1213,7 +1253,7 @@ comparam(tp, t)
 
 	if (ospeed == 0) {
 		CLR(sc->sc_mcr, MCR_DTR);
-		bus_io_write_1(bc, ioh, com_mcr, sc->sc_mcr);
+		bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr);
 	}
 
 	/*
@@ -1246,34 +1286,34 @@ comparam(tp, t)
 				}
 			}
 
-			bus_io_write_1(bc, ioh, com_lcr, lcr | LCR_DLAB);
-			bus_io_write_1(bc, ioh, com_dlbl, ospeed);
-			bus_io_write_1(bc, ioh, com_dlbh, ospeed >> 8);
-			bus_io_write_1(bc, ioh, com_lcr, lcr);
+			bus_space_write_1(iot, ioh, com_lcr, lcr | LCR_DLAB);
+			bus_space_write_1(iot, ioh, com_dlbl, ospeed);
+			bus_space_write_1(iot, ioh, com_dlbh, ospeed >> 8);
+			bus_space_write_1(iot, ioh, com_lcr, lcr);
 			SET(sc->sc_mcr, MCR_DTR);
-			bus_io_write_1(bc, ioh, com_mcr, sc->sc_mcr);
+			bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr);
 		} else
-			bus_io_write_1(bc, ioh, com_lcr, lcr);
+			bus_space_write_1(iot, ioh, com_lcr, lcr);
 
 		if (!ISSET(sc->sc_hwflags, COM_HW_HAYESP) &&
 		    ISSET(sc->sc_hwflags, COM_HW_FIFO))
-			bus_io_write_1(bc, ioh, com_fifo,
+			bus_space_write_1(iot, ioh, com_fifo,
 			    FIFO_ENABLE |
 			    (t->c_ispeed <= 1200 ? FIFO_TRIGGER_1 : FIFO_TRIGGER_8));
 	} else
-		bus_io_write_1(bc, ioh, com_lcr, lcr);
+		bus_space_write_1(iot, ioh, com_lcr, lcr);
 
 	/* When not using CRTSCTS, RTS follows DTR. */
 	if (!ISSET(t->c_cflag, CRTSCTS)) {
 		if (ISSET(sc->sc_mcr, MCR_DTR)) {
 			if (!ISSET(sc->sc_mcr, MCR_RTS)) {
 				SET(sc->sc_mcr, MCR_RTS);
-				bus_io_write_1(bc, ioh, com_mcr, sc->sc_mcr);
+				bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr);
 			}
 		} else {
 			if (ISSET(sc->sc_mcr, MCR_RTS)) {
 				CLR(sc->sc_mcr, MCR_RTS);
-				bus_io_write_1(bc, ioh, com_mcr, sc->sc_mcr);
+				bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr);
 			}
 		}
 		sc->sc_dtr = MCR_DTR | MCR_RTS;
@@ -1295,7 +1335,7 @@ comparam(tp, t)
 	    ISSET(oldcflag, MDMBUF) != ISSET(tp->t_cflag, MDMBUF) &&
 	    (*linesw[tp->t_line].l_modem)(tp, 0) == 0) {
 		CLR(sc->sc_mcr, sc->sc_dtr);
-		bus_io_write_1(bc, ioh, com_mcr, sc->sc_mcr);
+		bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr);
 	}
 
 	/* Just to be sure... */
@@ -1321,8 +1361,8 @@ comstart(tp)
 	struct tty *tp;
 {
 	struct com_softc *sc = com_cd.cd_devs[DEVUNIT(tp->t_dev)];
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_io_handle_t ioh = sc->sc_ioh;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
 	int s;
 
 	s = spltty();
@@ -1356,14 +1396,14 @@ comstart(tp)
 
 	if (!ISSET(sc->sc_ier, IER_ETXRDY)) {
 		SET(sc->sc_ier, IER_ETXRDY);
-		bus_io_write_1(bc, ioh, com_ier, sc->sc_ier);
+		bus_space_write_1(iot, ioh, com_ier, sc->sc_ier);
 	}
 #ifdef COM_HAYESP
 	if (ISSET(sc->sc_hwflags, COM_HW_HAYESP)) {
 		u_char buffer[1024], *cp = buffer;
 		int n = q_to_b(&tp->t_outq, cp, sizeof buffer);
 		do
-			bus_io_write_1(bc, ioh, com_data, *cp++);
+			bus_space_write_1(iot, ioh, com_data, *cp++);
 		while (--n);
 	}
 	else
@@ -1372,17 +1412,17 @@ comstart(tp)
 		u_char buffer[16], *cp = buffer;
 		int n = q_to_b(&tp->t_outq, cp, sizeof buffer);
 		do {
-			bus_io_write_1(bc, ioh, com_data, *cp++);
+			bus_space_write_1(iot, ioh, com_data, *cp++);
 		} while (--n);
 	} else
-		bus_io_write_1(bc, ioh, com_data, getc(&tp->t_outq));
+		bus_space_write_1(iot, ioh, com_data, getc(&tp->t_outq));
 out:
 	splx(s);
 	return;
 stopped:
 	if (ISSET(sc->sc_ier, IER_ETXRDY)) {
 		CLR(sc->sc_ier, IER_ETXRDY);
-		bus_io_write_1(bc, ioh, com_ier, sc->sc_ier);
+		bus_space_write_1(iot, ioh, com_ier, sc->sc_ier);
 	}
 	splx(s);
 }
@@ -1484,7 +1524,7 @@ compoll(arg)
 		    !ISSET(sc->sc_mcr, MCR_RTS)) {
 			/* XXX */
 			SET(sc->sc_mcr, MCR_RTS);
-			bus_io_write_1(sc->sc_bc, sc->sc_ioh, com_mcr,
+			bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_mcr,
 			    sc->sc_mcr);
 		}
 
@@ -1512,8 +1552,8 @@ comintr(arg)
 	void *arg;
 {
 	struct com_softc *sc = arg;
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_io_handle_t ioh = sc->sc_ioh;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
 	struct tty *tp;
 	u_char lsr, data, msr, delta;
 #ifdef COM_DEBUG
@@ -1528,10 +1568,10 @@ comintr(arg)
 
 #ifdef COM_DEBUG
 	n = 0;
-	if (ISSET(iter[n].iir = bus_io_read_1(bc, ioh, com_iir), IIR_NOPEND))
+	if (ISSET(iter[n].iir = bus_space_read_1(iot, ioh, com_iir), IIR_NOPEND))
 		return (0);
 #else
-	if (ISSET(bus_io_read_1(bc, ioh, com_iir), IIR_NOPEND))
+	if (ISSET(bus_space_read_1(iot, ioh, com_iir), IIR_NOPEND))
 		return (0);
 #endif
 
@@ -1541,14 +1581,14 @@ comintr(arg)
 #ifdef COM_DEBUG
 		iter[n].lsr =
 #endif
-		lsr = bus_io_read_1(bc, ioh, com_lsr);
+		lsr = bus_space_read_1(iot, ioh, com_lsr);
 
 		if (ISSET(lsr, LSR_RXRDY)) {
 			register u_char *p = sc->sc_ibufp;
 
 			comevents = 1;
 			do {
-				data = bus_io_read_1(bc, ioh, com_data);
+				data = bus_space_read_1(iot, ioh, com_data);
 				if (ISSET(lsr, LSR_BI)) {
 #ifdef notdef
 					printf("break %02x %02x %02x %02x\n",
@@ -1575,7 +1615,7 @@ comintr(arg)
 					    ISSET(tp->t_cflag, CRTSCTS)) {
 						/* XXX */
 						CLR(sc->sc_mcr, MCR_RTS);
-						bus_io_write_1(bc, ioh, com_mcr,
+						bus_space_write_1(iot, ioh, com_mcr,
 						    sc->sc_mcr);
 					}
 				}
@@ -1587,7 +1627,7 @@ comintr(arg)
 					goto ohfudge;
 				iter[n].lsr =
 #endif
-				lsr = bus_io_read_1(bc, ioh, com_lsr);
+				lsr = bus_space_read_1(iot, ioh, com_lsr);
 			} while (ISSET(lsr, LSR_RXRDY));
 
 			sc->sc_ibufp = p;
@@ -1600,7 +1640,7 @@ comintr(arg)
 #ifdef COM_DEBUG
 		iter[n].msr =
 #endif
-		msr = bus_io_read_1(bc, ioh, com_msr);
+		msr = bus_space_read_1(iot, ioh, com_msr);
 
 		if (msr != sc->sc_msr) {
 			delta = msr ^ sc->sc_msr;
@@ -1609,7 +1649,7 @@ comintr(arg)
 			    !ISSET(sc->sc_swflags, COM_SW_SOFTCAR) &&
 			    (*linesw[tp->t_line].l_modem)(tp, ISSET(msr, MSR_DCD)) == 0) {
 				CLR(sc->sc_mcr, sc->sc_dtr);
-				bus_io_write_1(bc, ioh, com_mcr, sc->sc_mcr);
+				bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr);
 			}
 			if (ISSET(delta & msr, MSR_CTS) &&
 			    ISSET(tp->t_cflag, CRTSCTS)) {
@@ -1628,10 +1668,10 @@ comintr(arg)
 #ifdef COM_DEBUG
 		if (++n >= 32)
 			goto ohfudge;
-		if (ISSET(iter[n].iir = bus_io_read_1(bc, ioh, com_iir), IIR_NOPEND))
+		if (ISSET(iter[n].iir = bus_space_read_1(iot, ioh, com_iir), IIR_NOPEND))
 			return (1);
 #else
-		if (ISSET(bus_io_read_1(bc, ioh, com_iir), IIR_NOPEND))
+		if (ISSET(bus_space_read_1(iot, ioh, com_iir), IIR_NOPEND))
 			return (1);
 #endif
 	}
@@ -1661,16 +1701,24 @@ comcnprobe(cp)
 	struct consdev *cp;
 {
 	/* XXX NEEDS TO BE FIXED XXX */
-	bus_chipset_tag_t bc = 0;
-	bus_io_handle_t ioh;
+	bus_space_tag_t iot = 0;
+	bus_space_handle_t ioh;
 	int found;
+#if NCOM_PICA
+	/* XXX */
+#include <arc/arc/arctype.h>
+	extern int cputype;
+
+	if(cputype != ACER_PICA_61)
+		return;
+#endif
 
-	if (bus_io_map(bc, CONADDR, COM_NPORTS, &ioh)) {
+	if (bus_space_map(iot, CONADDR, COM_NPORTS, 0, &ioh)) {
 		cp->cn_pri = CN_DEAD;
 		return;
 	}
-	found = comprobe1(bc, ioh, CONADDR);
-	bus_io_unmap(bc, ioh, COM_NPORTS);
+	found = comprobe1(iot, ioh, CONADDR);
+	bus_space_unmap(iot, ioh, COM_NPORTS);
 	if (!found) {
 		cp->cn_pri = CN_DEAD;
 		return;
@@ -1697,33 +1745,33 @@ comcninit(cp)
 
 #if 0
 	XXX NEEDS TO BE FIXED XXX
-	comconsbc = ???;
+	comconsiot = ???;
 #endif
-	if (bus_io_map(comconsbc, CONADDR, COM_NPORTS, &comconsioh))
+	if (bus_space_map(comconsiot, CONADDR, COM_NPORTS, 0, &comconsioh))
 		panic("comcninit: mapping failed");
 
-	cominit(comconsbc, comconsioh, comdefaultrate);
+	cominit(comconsiot, comconsioh, comdefaultrate);
 	comconsaddr = CONADDR;
 	comconsinit = 0;
 }
 
 void
-cominit(bc, ioh, rate)
-	bus_chipset_tag_t bc;
-	bus_io_handle_t ioh;
+cominit(iot, ioh, rate)
+	bus_space_tag_t iot;
+	bus_space_handle_t ioh;
 	int rate;
 {
 	int s = splhigh();
 	u_char stat;
 
-	bus_io_write_1(bc, ioh, com_lcr, LCR_DLAB);
+	bus_space_write_1(iot, ioh, com_lcr, LCR_DLAB);
 	rate = comspeed(comdefaultrate);
-	bus_io_write_1(bc, ioh, com_dlbl, rate);
-	bus_io_write_1(bc, ioh, com_dlbh, rate >> 8);
-	bus_io_write_1(bc, ioh, com_lcr, LCR_8BITS);
-	bus_io_write_1(bc, ioh, com_ier, IER_ERXRDY | IER_ETXRDY);
-	bus_io_write_1(bc, ioh, com_fifo, FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | FIFO_TRIGGER_4);
-	stat = bus_io_read_1(bc, ioh, com_iir);
+	bus_space_write_1(iot, ioh, com_dlbl, rate);
+	bus_space_write_1(iot, ioh, com_dlbh, rate >> 8);
+	bus_space_write_1(iot, ioh, com_lcr, LCR_8BITS);
+	bus_space_write_1(iot, ioh, com_ier, IER_ERXRDY | IER_ETXRDY);
+	bus_space_write_1(iot, ioh, com_fifo, FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | FIFO_TRIGGER_4);
+	stat = bus_space_read_1(iot, ioh, com_iir);
 	splx(s);
 }
 
@@ -1732,14 +1780,14 @@ comcngetc(dev)
 	dev_t dev;
 {
 	int s = splhigh();
-	bus_chipset_tag_t bc = comconsbc;
-	bus_io_handle_t ioh = comconsioh;
+	bus_space_tag_t iot = comconsiot;
+	bus_space_handle_t ioh = comconsioh;
 	u_char stat, c;
 
-	while (!ISSET(stat = bus_io_read_1(bc, ioh, com_lsr), LSR_RXRDY))
+	while (!ISSET(stat = bus_space_read_1(iot, ioh, com_lsr), LSR_RXRDY))
 		;
-	c = bus_io_read_1(bc, ioh, com_data);
-	stat = bus_io_read_1(bc, ioh, com_iir);
+	c = bus_space_read_1(iot, ioh, com_data);
+	stat = bus_space_read_1(iot, ioh, com_iir);
 	splx(s);
 	return c;
 }
@@ -1753,8 +1801,8 @@ comcnputc(dev, c)
 	int c;
 {
 	int s = splhigh();
-	bus_chipset_tag_t bc = comconsbc;
-	bus_io_handle_t ioh = comconsioh;
+	bus_space_tag_t iot = comconsiot;
+	bus_space_handle_t ioh = comconsioh;
 	u_char stat;
 	register int timo;
 
@@ -1762,20 +1810,20 @@ comcnputc(dev, c)
 	if (dev != kgdb_dev)
 #endif
 	if (comconsinit == 0) {
-		cominit(bc, ioh, comdefaultrate);
+		cominit(iot, ioh, comdefaultrate);
 		comconsinit = 1;
 	}
 	/* wait for any pending transmission to finish */
 	timo = 50000;
-	while (!ISSET(stat = bus_io_read_1(bc, ioh, com_lsr), LSR_TXRDY) && --timo)
+	while (!ISSET(stat = bus_space_read_1(iot, ioh, com_lsr), LSR_TXRDY) && --timo)
 		;
-	bus_io_write_1(bc, ioh, com_data, c);
+	bus_space_write_1(iot, ioh, com_data, c);
 	/* wait for this transmission to complete */
 	timo = 1500000;
-	while (!ISSET(stat = bus_io_read_1(bc, ioh, com_lsr), LSR_TXRDY) && --timo)
+	while (!ISSET(stat = bus_space_read_1(iot, ioh, com_lsr), LSR_TXRDY) && --timo)
 		;
 	/* clear any interrupts generated by this transmission */
-	stat = bus_io_read_1(bc, ioh, com_iir);
+	stat = bus_space_read_1(iot, ioh, com_iir);
 	splx(s);
 }
 
diff --git a/sys/dev/ic/comvar.h b/sys/dev/ic/comvar.h
index ece4b98bb73..6895af5d813 100644
--- a/sys/dev/ic/comvar.h
+++ b/sys/dev/ic/comvar.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: comvar.h,v 1.4 1996/10/30 15:01:50 niklas Exp $	*/
+/*	$OpenBSD: comvar.h,v 1.5 1996/11/29 22:54:52 niklas Exp $	*/
 /*	$NetBSD: comvar.h,v 1.5 1996/05/05 19:50:47 christos Exp $	*/
 
 /*
@@ -34,18 +34,18 @@
 struct commulti_attach_args {
 	int		ca_slave;		/* slave number */
 
-	bus_chipset_tag_t ca_bc;
-	bus_io_handle_t ca_ioh;
+	bus_space_tag_t ca_iot;
+	bus_space_handle_t ca_ioh;
 	int		ca_iobase;
 	int		ca_noien;
 };
 
-int comprobe1 __P((bus_chipset_tag_t, bus_io_handle_t, int));
-void cominit __P((bus_chipset_tag_t, bus_io_handle_t, int));
+int comprobe1 __P((bus_space_tag_t, bus_space_handle_t, int));
+void cominit __P((bus_space_tag_t, bus_space_handle_t, int));
 int comintr __P((void *));
 
 extern int comconsaddr;
 extern int comconsattached;
-extern bus_chipset_tag_t comconsbc;
-extern bus_io_handle_t comconsioh;
+extern bus_space_tag_t comconsiot;
+extern bus_space_handle_t comconsioh;
 extern tcflag_t comconscflag;
diff --git a/sys/dev/isa/ast.c b/sys/dev/isa/ast.c
index f4411947118..8e42ae8385a 100644
--- a/sys/dev/isa/ast.c
+++ b/sys/dev/isa/ast.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ast.c,v 1.14 1996/11/23 21:46:37 kstailey Exp $	*/
+/*	$OpenBSD: ast.c,v 1.15 1996/11/29 22:54:50 niklas Exp $	*/
 /*	$NetBSD: ast.c,v 1.28 1996/05/12 23:51:45 mycroft Exp $	*/
 
 /*
@@ -39,7 +39,7 @@
 #include <sys/device.h>
 #include <sys/termios.h>
 
-#include <machine/bus.old.h>
+#include <machine/bus.h>
 #include <machine/intr.h>
 
 #include <dev/isa/isavar.h>
@@ -52,12 +52,12 @@ struct ast_softc {
 	struct device sc_dev;
 	void *sc_ih;
 
-	bus_chipset_tag_t sc_bc;
+	bus_space_tag_t sc_iot;
 	int sc_iobase;
 
 	int sc_alive;			/* mask of slave units attached */
 	void *sc_slaves[NSLAVES];	/* com device unit numbers */
-	bus_io_handle_t sc_slaveioh[NSLAVES];
+	bus_space_handle_t sc_slaveioh[NSLAVES];
 };
 
 int astprobe __P((struct device *, void *, void *));
@@ -81,8 +81,8 @@ astprobe(parent, self, aux)
 {
 	struct isa_attach_args *ia = aux;
 	int iobase = ia->ia_iobase;
-	bus_chipset_tag_t bc = ia->ia_bc;
-	bus_io_handle_t ioh;
+	bus_space_tag_t iot = ia->ia_iot;
+	bus_space_handle_t ioh;
 	int i, rv = 1;
 
 	/*
@@ -96,12 +96,12 @@ astprobe(parent, self, aux)
 	if (iobase == comconsaddr && !comconsattached)
 		goto checkmappings;
 
-	if (bus_io_map(bc, iobase, COM_NPORTS, &ioh)) {
+	if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
 		rv = 0;
 		goto out;
 	}
-	rv = comprobe1(bc, ioh, iobase);
-	bus_io_unmap(bc, ioh, COM_NPORTS);
+	rv = comprobe1(iot, ioh, iobase);
+	bus_space_unmap(iot, ioh, COM_NPORTS);
 	if (rv == 0)
 		goto out;
 
@@ -112,11 +112,11 @@ checkmappings:
 		if (iobase == comconsaddr && !comconsattached)
 			continue;
 
-		if (bus_io_map(bc, iobase, COM_NPORTS, &ioh)) {
+		if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
 			rv = 0;
 			goto out;
 		}
-		bus_io_unmap(bc, ioh, COM_NPORTS);
+		bus_space_unmap(iot, ioh, COM_NPORTS);
 	}
 
 out:
@@ -148,24 +148,24 @@ astattach(parent, self, aux)
 	struct commulti_attach_args ca;
 	int i;
 
-	sc->sc_bc = ia->ia_bc;
+	sc->sc_iot = ia->ia_iot;
 	sc->sc_iobase = ia->ia_iobase;
 
 	for (i = 0; i < NSLAVES; i++)
-		if (bus_io_map(sc->sc_bc, sc->sc_iobase + i * COM_NPORTS,
-		    COM_NPORTS, &sc->sc_slaveioh[i]))
+		if (bus_space_map(sc->sc_iot, sc->sc_iobase + i * COM_NPORTS,
+		    COM_NPORTS, 0, &sc->sc_slaveioh[i]))
 			panic("astattach: couldn't map slave %d", i);
 
 	/*
 	 * Enable the master interrupt.
 	 */
-	bus_io_write_1(sc->sc_bc, sc->sc_slaveioh[3], 7, 0x80);
+	bus_space_write_1(sc->sc_iot, sc->sc_slaveioh[3], 7, 0x80);
 
 	printf("\n");
 
 	for (i = 0; i < NSLAVES; i++) {
 		ca.ca_slave = i;
-		ca.ca_bc = sc->sc_bc;
+		ca.ca_iot = sc->sc_iot;
 		ca.ca_ioh = sc->sc_slaveioh[i];
 		ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS;
 		ca.ca_noien = 1;
@@ -184,11 +184,11 @@ astintr(arg)
 	void *arg;
 {
 	struct ast_softc *sc = arg;
-	bus_chipset_tag_t bc = sc->sc_bc;
+	bus_space_tag_t iot = sc->sc_iot;
 	int alive = sc->sc_alive;
 	int bits;
 
-	bits = ~bus_io_read_1(bc, sc->sc_slaveioh[3], 7) & alive;
+	bits = ~bus_space_read_1(iot, sc->sc_slaveioh[3], 7) & alive;
 	if (bits == 0)
 		return (0);
 
@@ -201,7 +201,7 @@ astintr(arg)
 		TRY(2);
 		TRY(3);
 #undef TRY
-		bits = ~bus_io_read_1(bc, sc->sc_slaveioh[3], 7) & alive;
+		bits = ~bus_space_read_1(iot, sc->sc_slaveioh[3], 7) & alive;
 		if (bits == 0)
 			return (1);
  	}
diff --git a/sys/dev/isa/boca.c b/sys/dev/isa/boca.c
index 6760e5ac5f8..efaeded1bea 100644
--- a/sys/dev/isa/boca.c
+++ b/sys/dev/isa/boca.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: boca.c,v 1.12 1996/11/23 21:46:38 kstailey Exp $ */
+/*	$OpenBSD: boca.c,v 1.13 1996/11/29 22:54:51 niklas Exp $ */
 /*	$NetBSD: boca.c,v 1.15 1996/05/12 23:51:50 mycroft Exp $	*/
 
 /*
@@ -39,7 +39,7 @@
 #include <sys/device.h>
 #include <sys/termios.h>
 
-#include <machine/bus.old.h>
+#include <machine/bus.h>
 #include <machine/intr.h>
 
 #include <dev/isa/isavar.h>
@@ -52,12 +52,12 @@ struct boca_softc {
 	struct device sc_dev;
 	void *sc_ih;
 
-	bus_chipset_tag_t sc_bc;
+	bus_space_tag_t sc_iot;
 	int sc_iobase;
 
 	int sc_alive;			/* mask of slave units attached */
 	void *sc_slaves[NSLAVES];	/* com device unit numbers */
-	bus_io_handle_t sc_slaveioh[NSLAVES];
+	bus_space_handle_t sc_slaveioh[NSLAVES];
 };
 
 int bocaprobe __P((struct device *, void *, void *));
@@ -81,8 +81,8 @@ bocaprobe(parent, self, aux)
 {
 	struct isa_attach_args *ia = aux;
 	int iobase = ia->ia_iobase;
-	bus_chipset_tag_t bc = ia->ia_bc;
-	bus_io_handle_t ioh;
+	bus_space_tag_t iot = ia->ia_iot;
+	bus_space_handle_t ioh;
 	int i, rv = 1;
 
 	/*
@@ -96,12 +96,12 @@ bocaprobe(parent, self, aux)
 	if (iobase == comconsaddr && !comconsattached)
 		goto checkmappings;
 
-	if (bus_io_map(bc, iobase, COM_NPORTS, &ioh)) {
+	if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
 		rv = 0;
 		goto out;
 	}
-	rv = comprobe1(bc, ioh, iobase);
-	bus_io_unmap(bc, ioh, COM_NPORTS);
+	rv = comprobe1(iot, ioh, iobase);
+	bus_space_unmap(iot, ioh, COM_NPORTS);
 	if (rv == 0)
 		goto out;
 
@@ -112,11 +112,11 @@ checkmappings:
 		if (iobase == comconsaddr && !comconsattached)
 			continue;
 
-		if (bus_io_map(bc, iobase, COM_NPORTS, &ioh)) {
+		if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
 			rv = 0;
 			goto out;
 		}
-		bus_io_unmap(bc, ioh, COM_NPORTS);
+		bus_space_unmap(iot, ioh, COM_NPORTS);
 	}
 
 out:
@@ -146,15 +146,15 @@ bocaattach(parent, self, aux)
 	struct boca_softc *sc = (void *)self;
 	struct isa_attach_args *ia = aux;
 	struct commulti_attach_args ca;
-	bus_chipset_tag_t bc = ia->ia_bc;
+	bus_space_tag_t iot = ia->ia_iot;
 	int i;
 
-	sc->sc_bc = ia->ia_bc;
+	sc->sc_iot = ia->ia_iot;
 	sc->sc_iobase = ia->ia_iobase;
 
 	for (i = 0; i < NSLAVES; i++)
-		if (bus_io_map(bc, sc->sc_iobase + i * COM_NPORTS, COM_NPORTS,
-		    &sc->sc_slaveioh[i]))
+		if (bus_space_map(iot, sc->sc_iobase + i * COM_NPORTS,
+		    COM_NPORTS, 0, &sc->sc_slaveioh[i]))
 			panic("bocaattach: couldn't map slave %d", i);
 
 	printf("\n");
@@ -162,7 +162,7 @@ bocaattach(parent, self, aux)
 	for (i = 0; i < NSLAVES; i++) {
 
 		ca.ca_slave = i;
-		ca.ca_bc = sc->sc_bc;
+		ca.ca_iot = sc->sc_iot;
 		ca.ca_ioh = sc->sc_slaveioh[i];
 		ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS;
 		ca.ca_noien = 0;
@@ -181,11 +181,11 @@ bocaintr(arg)
 	void *arg;
 {
 	struct boca_softc *sc = arg;
-	bus_chipset_tag_t bc = sc->sc_bc;
+	bus_space_tag_t iot = sc->sc_iot;
 	int alive = sc->sc_alive;
 	int bits;
 
-	bits = bus_io_read_1(bc, sc->sc_slaveioh[0], 7) & alive;
+	bits = bus_space_read_1(iot, sc->sc_slaveioh[0], 7) & alive;
 	if (bits == 0)
 		return (0);
 
@@ -202,7 +202,7 @@ bocaintr(arg)
 		TRY(6);
 		TRY(7);
 #undef TRY
-		bits = bus_io_read_1(bc, sc->sc_slaveioh[0], 7) & alive;
+		bits = bus_space_read_1(iot, sc->sc_slaveioh[0], 7) & alive;
 		if (bits == 0)
 			return (1);
  	}
diff --git a/sys/dev/isa/com.c b/sys/dev/isa/com.c
index 7c06bfbed0e..81b15473c45 100644
--- a/sys/dev/isa/com.c
+++ b/sys/dev/isa/com.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: com.c,v 1.27 1996/11/12 20:30:27 niklas Exp $	*/
+/*	$OpenBSD: com.c,v 1.28 1996/11/29 22:54:52 niklas Exp $	*/
 /*	$NetBSD: com.c,v 1.82.4.1 1996/06/02 09:08:00 mrg Exp $	*/
 
 /*-
@@ -57,7 +57,7 @@
 #include <sys/types.h>
 #include <sys/device.h>
 
-#include <machine/bus.old.h>
+#include <machine/bus.h>
 #include <machine/intr.h>
 
 #include <dev/isa/isavar.h>
@@ -78,7 +78,7 @@
 struct com_softc {
 	struct device sc_dev;
 	void *sc_ih;
-	bus_chipset_tag_t sc_bc;
+	bus_space_tag_t sc_iot;
 	struct tty *sc_tty;
 
 	int sc_overflows;
@@ -92,8 +92,9 @@ struct com_softc {
 	int sc_hayespbase;
 #endif
 
-	bus_io_handle_t sc_ioh;
-	bus_io_handle_t sc_hayespioh;
+	bus_space_handle_t sc_ioh;
+	bus_space_handle_t sc_hayespioh;
+	isa_chipset_tag_t sc_ic;
 
 	u_char sc_hwflags;
 #define	COM_HW_NOIEN	0x01
@@ -120,7 +121,7 @@ struct com_softc {
 };
 
 #ifdef COM_HAYESP
-int comprobeHAYESP __P((bus_io_handle_t hayespioh, struct com_softc *sc));
+int comprobeHAYESP __P((bus_space_handle_t hayespioh, struct com_softc *sc));
 #endif
 void	comdiag		__P((void *));
 int	comspeed	__P((long));
@@ -162,6 +163,15 @@ struct cfattach com_commulti_ca = {
 };
 #endif
 
+#if NCOM_PICA
+#undef  CONADDR         /* This is stupid but using devs before config .. */
+#define CONADDR 0xe0006000
+
+struct cfattach com_pica_ca = {
+	sizeof(struct com_softc), comprobe, comattach
+};
+#endif
+
 struct cfdriver com_cd = {
 	NULL, "com", DV_TTY
 };
@@ -178,8 +188,8 @@ int	comdefaultrate = TTYDEF_SPEED;
 int	comconsaddr;
 int	comconsinit;
 int	comconsattached;
-bus_chipset_tag_t comconsbc;
-bus_io_handle_t comconsioh;
+bus_space_tag_t comconsiot;
+bus_space_handle_t comconsioh;
 tcflag_t comconscflag = TTYDEF_CFLAG;
 
 int	commajor;
@@ -294,6 +304,7 @@ com_pcmcia_isa_attach(parent, match, aux, pc_link)
 				(sc->sc_hwflags & (COM_HW_ABSENT_PENDING|COM_HW_CONSOLE));
 		} else
 			sc->sc_hwflags = 0;
+		sc->sc_ic = ia->ia_ic;
 	}
 	return rval;
 }
@@ -339,7 +350,7 @@ com_pcmcia_remove(pc_link, self)
 		ttyfree(sc->sc_tty);
 		sc->sc_tty = NULL;
     ok:
-		isa_intr_disestablish(sc->sc_bc, sc->sc_ih);
+		isa_intr_disestablish(sc->sc_ic, sc->sc_ih);
 		sc->sc_ih = NULL;
 		SET(sc->sc_hwflags, COM_HW_ABSENT);
 		return 0;		/* OK! */
@@ -420,20 +431,20 @@ comspeed(speed)
 }
 
 int
-comprobe1(bc, ioh, iobase)
-	bus_chipset_tag_t bc;
-	bus_io_handle_t ioh;
+comprobe1(iot, ioh, iobase)
+	bus_space_tag_t iot;
+	bus_space_handle_t ioh;
 	int iobase;
 {
 	int i, k;
 
 	/* force access to id reg */
-	bus_io_write_1(bc, ioh, com_lcr, 0);
-	bus_io_write_1(bc, ioh, com_iir, 0);
+	bus_space_write_1(iot, ioh, com_lcr, 0);
+	bus_space_write_1(iot, ioh, com_iir, 0);
 	for (i = 0; i < 32; i++) {
-	    k = bus_io_read_1(bc, ioh, com_iir);
+	    k = bus_space_read_1(iot, ioh, com_iir);
 	    if (k & 0x38) {
-		bus_io_read_1(bc, ioh, com_data); /* cleanup */
+		bus_space_read_1(iot, ioh, com_data); /* cleanup */
 	    } else
 		break;
 	}
@@ -446,12 +457,12 @@ comprobe1(bc, ioh, iobase)
 #ifdef COM_HAYESP
 int
 comprobeHAYESP(hayespioh, sc)
-	bus_io_handle_t hayespioh;
+	bus_space_handle_t hayespioh;
 	struct com_softc *sc;
 {
 	char	val, dips;
 	int	combaselist[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 };
-	bus_chipset_tag_t bc = sc->sc_bc;
+	bus_space_tag_t iot = sc->sc_iot;
 
 	/*
 	 * Hayes ESP cards have two iobases.  One is for compatibility with
@@ -461,7 +472,7 @@ comprobeHAYESP(hayespioh, sc)
 	 */
 
 	/* Test for ESP signature */
-	if ((bus_io_read_1(bc, hayespioh, 0) & 0xf3) == 0)
+	if ((bus_space_read_1(iot, hayespioh, 0) & 0xf3) == 0)
 		return 0;
 
 	/*
@@ -469,8 +480,8 @@ comprobeHAYESP(hayespioh, sc)
 	 */
 
 	/* Get the dip-switch configurations */
-	bus_io_write_1(bc, hayespioh, HAYESP_CMD1, HAYESP_GETDIPS);
-	dips = bus_io_read_1(bc, hayespioh, HAYESP_STATUS1);
+	bus_space_write_1(iot, hayespioh, HAYESP_CMD1, HAYESP_GETDIPS);
+	dips = bus_space_read_1(iot, hayespioh, HAYESP_STATUS1);
 
 	/* Determine which com port this ESP card services: bits 0,1 of  */
 	/*  dips is the port # (0-3); combaselist[val] is the com_iobase */
@@ -481,9 +492,9 @@ comprobeHAYESP(hayespioh, sc)
 
  	/* Check ESP Self Test bits. */
 	/* Check for ESP version 2.0: bits 4,5,6 == 010 */
-	bus_io_write_1(bc, hayespioh, HAYESP_CMD1, HAYESP_GETTEST);
-	val = bus_io_read_1(bc, hayespioh, HAYESP_STATUS1); /* Clear reg 1 */
-	val = bus_io_read_1(bc, hayespioh, HAYESP_STATUS2);
+	bus_space_write_1(iot, hayespioh, HAYESP_CMD1, HAYESP_GETTEST);
+	val = bus_space_read_1(iot, hayespioh, HAYESP_STATUS1); /* Clear reg 1 */
+	val = bus_space_read_1(iot, hayespioh, HAYESP_STATUS2);
 	if ((val & 0x70) < 0x20) {
 		printf("-old (%o)", val & 0x70);
 		/* we do not support the necessary features */
@@ -513,8 +524,8 @@ comprobe(parent, match, aux)
 	struct device *parent;
 	void *match, *aux;
 {
-	bus_chipset_tag_t bc;
-	bus_io_handle_t ioh;
+	bus_space_tag_t iot;
+	bus_space_handle_t ioh;
 	int iobase, needioh;
 	int rv = 1;
 
@@ -526,6 +537,10 @@ comprobe(parent, match, aux)
 #define IS_ISA(parent) \
 	!strcmp((parent)->dv_cfdata->cf_driver->cd_name, "isa")
 #endif
+#if NCOM_PICA
+#define IS_PICA(parent) \
+	!strcmp((parent)->dv_cfdata->cf_driver->cd_name, "pica")
+#endif
 	/*
 	 * XXX should be broken out into functions for isa probe and
 	 * XXX for commulti probe, with a helper function that contains
@@ -535,7 +550,7 @@ comprobe(parent, match, aux)
 	if (IS_ISA(parent)) {
 		struct isa_attach_args *ia = aux;
 
-		bc = ia->ia_bc;
+		iot = ia->ia_iot;
 		iobase = ia->ia_iobase;
 		needioh = 1;
 	} else
@@ -548,25 +563,35 @@ comprobe(parent, match, aux)
 		if (cf->cf_loc[0] != -1 && cf->cf_loc[0] != ca->ca_slave)
 			return (0);
 
-		bc = ca->ca_bc;
+		iot = ca->ca_iot;
 		iobase = ca->ca_iobase;
 		ioh = ca->ca_ioh;
 		needioh = 0;
 	} else
 #endif
+#if NCOM_PICA
+	if(IS_PICA(parent)) {
+		struct confargs *ca = aux;
+		if(!BUS_MATCHNAME(ca, "com"))
+			return(0);
+		iobase = (long)BUS_CVTADDR(ca);
+		iot = 0;
+		needioh = 1;
+	} else
+#endif
 		return(0);			/* This cannot happen */
 
 	/* if it's in use as console, it's there. */
 	if (iobase == comconsaddr && !comconsattached)
 		goto out;
 
-	if (needioh && bus_io_map(bc, iobase, COM_NPORTS, &ioh)) {
+	if (needioh && bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
 		rv = 0;
 		goto out;
 	}
-	rv = comprobe1(bc, ioh, iobase);
+	rv = comprobe1(iot, ioh, iobase);
 	if (needioh)
-		bus_io_unmap(bc, ioh, COM_NPORTS);
+		bus_space_unmap(iot, ioh, COM_NPORTS);
 
 out:
 #if NCOM_ISA || NCOM_PCMCIA
@@ -587,8 +612,8 @@ comattach(parent, self, aux)
 {
 	struct com_softc *sc = (void *)self;
 	int iobase, irq;
-	bus_chipset_tag_t bc;
-	bus_io_handle_t ioh;
+	bus_space_tag_t iot;
+	bus_space_handle_t ioh;
 #ifdef COM_HAYESP
 	int	hayesp_ports[] = { 0x140, 0x180, 0x280, 0x300, 0 };
 	int	*hayespp;
@@ -615,9 +640,9 @@ comattach(parent, self, aux)
 		 * We're living on an isa.
 		 */
 		iobase = ia->ia_iobase;
-		bc = ia->ia_bc;
+		iot = ia->ia_iot;
 	        if (iobase != comconsaddr) {
-	                if (bus_io_map(bc, iobase, COM_NPORTS, &ioh))
+	                if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh))
 				panic("comattach: io mapping failed");
 		} else
 	                ioh = comconsioh;
@@ -632,7 +657,7 @@ comattach(parent, self, aux)
 		 * We're living on a commulti.
 		 */
 		iobase = ca->ca_iobase;
-		bc = ca->ca_bc;
+		iot = ca->ca_iot;
 		ioh = ca->ca_ioh;
 		irq = IRQUNK;
 
@@ -640,9 +665,18 @@ comattach(parent, self, aux)
 			SET(sc->sc_hwflags, COM_HW_NOIEN);
 	} else
 #endif
+#if NCOM_PICA
+	if(IS_PICA(parent)) {
+		struct confargs *ca = aux;
+		iobase = (long)BUS_CVTADDR(ca);
+		iot = 0;
+		irq = 0;
+		ioh = iobase;
+	} else
+#endif
 		panic("comattach: impossible");
 
-	sc->sc_bc = bc;
+	sc->sc_iot = iot;
 	sc->sc_ioh = ioh;
 	sc->sc_iobase = iobase;
 
@@ -662,29 +696,29 @@ comattach(parent, self, aux)
 #ifdef COM_HAYESP
 	/* Look for a Hayes ESP board. */
 	for (hayespp = hayesp_ports; *hayespp != 0; hayespp++) {
-		bus_io_handle_t hayespioh;
+		bus_space_handle_t hayespioh;
 
 #define	HAYESP_NPORTS	8			/* XXX XXX XXX ??? ??? ??? */
-		if (bus_io_map(bc, *hayespp, HAYESP_NPORTS, &hayespioh))
+		if (bus_space_map(iot, *hayespp, HAYESP_NPORTS, 0, &hayespioh))
 			continue;
 		if (comprobeHAYESP(hayespioh, sc)) {
 			sc->sc_hayespbase = *hayespp;
 			sc->sc_hayespioh = hayespioh;
 			break;
 		}
-		bus_io_unmap(bc, hayespioh, HAYESP_NPORTS);
+		bus_space_unmap(iot, hayespioh, HAYESP_NPORTS);
 	}
 	/* No ESP; look for other things. */
 	if (*hayespp == 0) {
 #endif
 
 	/* look for a NS 16550AF UART with FIFOs */
-	bus_io_write_1(bc, ioh, com_fifo,
+	bus_space_write_1(iot, ioh, com_fifo,
 	    FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | FIFO_TRIGGER_14);
 	delay(100);
-	if (ISSET(bus_io_read_1(bc, ioh, com_iir), IIR_FIFO_MASK) ==
+	if (ISSET(bus_space_read_1(iot, ioh, com_iir), IIR_FIFO_MASK) ==
 	    IIR_FIFO_MASK)
-		if (ISSET(bus_io_read_1(bc, ioh, com_fifo), FIFO_TRIGGER_14) ==
+		if (ISSET(bus_space_read_1(iot, ioh, com_fifo), FIFO_TRIGGER_14) ==
 		    FIFO_TRIGGER_14) {
 			SET(sc->sc_hwflags, COM_HW_FIFO);
 			printf(": ns16550a, working fifo\n");
@@ -692,14 +726,14 @@ comattach(parent, self, aux)
 			printf(": ns16550, broken fifo\n");
 	else
 		printf(": ns8250 or ns16450, no fifo\n");
-	bus_io_write_1(bc, ioh, com_fifo, 0);
+	bus_space_write_1(iot, ioh, com_fifo, 0);
 #ifdef COM_HAYESP
 	}
 #endif
 
 	/* disable interrupts */
-	bus_io_write_1(bc, ioh, com_ier, 0);
-	bus_io_write_1(bc, ioh, com_mcr, 0);
+	bus_space_write_1(iot, ioh, com_ier, 0);
+	bus_space_write_1(iot, ioh, com_mcr, 0);
 
 	if (irq != IRQUNK) {
 #if NCOM_ISA || NCOM_PCMCIA
@@ -711,6 +745,12 @@ comattach(parent, self, aux)
 			    sc->sc_dev.dv_xname);
 		} else
 #endif
+#if NCOM_PICA
+		if (IS_PICA(parent)) {
+			struct confargs *ca = aux;
+			BUS_INTR_ESTABLISH(ca, comintr, (void *)(long)sc);
+		} else
+#endif
 			panic("comattach: IRQ but can't have one");
 	}
 
@@ -719,7 +759,7 @@ comattach(parent, self, aux)
 		if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE))
 			kgdb_dev = -1;	/* can't debug over console port */
 		else {
-			cominit(bc, ioh, kgdb_rate);
+			cominit(iot, ioh, kgdb_rate);
 			if (kgdb_debug_init) {
 				/*
 				 * Print prefix of device name,
@@ -747,8 +787,8 @@ comopen(dev, flag, mode, p)
 {
 	int unit = DEVUNIT(dev);
 	struct com_softc *sc;
-	bus_chipset_tag_t bc;
-	bus_io_handle_t ioh;
+	bus_space_tag_t iot;
+	bus_space_handle_t ioh;
 	struct tty *tp;
 	int s;
 	int error = 0;
@@ -801,37 +841,37 @@ comopen(dev, flag, mode, p)
 		sc->sc_ibufhigh = sc->sc_ibuf + COM_IHIGHWATER;
 		sc->sc_ibufend = sc->sc_ibuf + COM_IBUFSIZE;
 
-		bc = sc->sc_bc;
+		iot = sc->sc_iot;
 		ioh = sc->sc_ioh;
 #ifdef COM_HAYESP
 		/* Setup the ESP board */
 		if (ISSET(sc->sc_hwflags, COM_HW_HAYESP)) {
-			bus_io_handle_t hayespioh = sc->sc_hayespioh;
+			bus_space_handle_t hayespioh = sc->sc_hayespioh;
 
-			bus_io_write_1(bc, ioh, com_fifo,
+			bus_space_write_1(iot, ioh, com_fifo,
 			     FIFO_DMA_MODE|FIFO_ENABLE|
 			     FIFO_RCV_RST|FIFO_XMT_RST|FIFO_TRIGGER_8);
 
 			/* Set 16550 compatibility mode */
-			bus_io_write_1(bc, hayespioh, HAYESP_CMD1, HAYESP_SETMODE);
-			bus_io_write_1(bc, hayespioh, HAYESP_CMD2, 
+			bus_space_write_1(iot, hayespioh, HAYESP_CMD1, HAYESP_SETMODE);
+			bus_space_write_1(iot, hayespioh, HAYESP_CMD2, 
 			     HAYESP_MODE_FIFO|HAYESP_MODE_RTS|
 			     HAYESP_MODE_SCALE);
 
 			/* Set RTS/CTS flow control */
-			bus_io_write_1(bc, hayespioh, HAYESP_CMD1, HAYESP_SETFLOWTYPE);
-			bus_io_write_1(bc, hayespioh, HAYESP_CMD2, HAYESP_FLOW_RTS);
-			bus_io_write_1(bc, hayespioh, HAYESP_CMD2, HAYESP_FLOW_CTS);
+			bus_space_write_1(iot, hayespioh, HAYESP_CMD1, HAYESP_SETFLOWTYPE);
+			bus_space_write_1(iot, hayespioh, HAYESP_CMD2, HAYESP_FLOW_RTS);
+			bus_space_write_1(iot, hayespioh, HAYESP_CMD2, HAYESP_FLOW_CTS);
 
 			/* Set flow control levels */
-			bus_io_write_1(bc, hayespioh, HAYESP_CMD1, HAYESP_SETRXFLOW);
-			bus_io_write_1(bc, hayespioh, HAYESP_CMD2, 
+			bus_space_write_1(iot, hayespioh, HAYESP_CMD1, HAYESP_SETRXFLOW);
+			bus_space_write_1(iot, hayespioh, HAYESP_CMD2, 
 			     HAYESP_HIBYTE(HAYESP_RXHIWMARK));
-			bus_io_write_1(bc, hayespioh, HAYESP_CMD2,
+			bus_space_write_1(iot, hayespioh, HAYESP_CMD2,
 			     HAYESP_LOBYTE(HAYESP_RXHIWMARK));
-			bus_io_write_1(bc, hayespioh, HAYESP_CMD2,
+			bus_space_write_1(iot, hayespioh, HAYESP_CMD2,
 			     HAYESP_HIBYTE(HAYESP_RXLOWMARK));
-			bus_io_write_1(bc, hayespioh, HAYESP_CMD2,
+			bus_space_write_1(iot, hayespioh, HAYESP_CMD2,
 			     HAYESP_LOBYTE(HAYESP_RXLOWMARK));
 		} else
 #endif
@@ -848,32 +888,32 @@ comopen(dev, flag, mode, p)
 			 * Set the FIFO threshold based on the receive speed.
 			 */
 			for (;;) {
-			 	bus_io_write_1(bc, ioh, com_fifo, 0);
+			 	bus_space_write_1(iot, ioh, com_fifo, 0);
 				delay(100);
-				(void) bus_io_read_1(bc, ioh, com_data);
-				bus_io_write_1(bc, ioh, com_fifo,
+				(void) bus_space_read_1(iot, ioh, com_data);
+				bus_space_write_1(iot, ioh, com_fifo,
 				    FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST |
 				    (tp->t_ispeed <= 1200 ?
 				    FIFO_TRIGGER_1 : FIFO_TRIGGER_8));
 				delay(100);
-				if(!ISSET(bus_io_read_1(bc, ioh,
+				if(!ISSET(bus_space_read_1(iot, ioh,
 				    com_lsr), LSR_RXRDY))
 				    	break;
 			}
 		}
 
 		/* flush any pending I/O */
-		while (ISSET(bus_io_read_1(bc, ioh, com_lsr), LSR_RXRDY))
-			(void) bus_io_read_1(bc, ioh, com_data);
+		while (ISSET(bus_space_read_1(iot, ioh, com_lsr), LSR_RXRDY))
+			(void) bus_space_read_1(iot, ioh, com_data);
 		/* you turn me on, baby */
 		sc->sc_mcr = MCR_DTR | MCR_RTS;
 		if (!ISSET(sc->sc_hwflags, COM_HW_NOIEN))
 			SET(sc->sc_mcr, MCR_IENABLE);
-		bus_io_write_1(bc, ioh, com_mcr, sc->sc_mcr);
+		bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr);
 		sc->sc_ier = IER_ERXRDY | IER_ERLS | IER_EMSC;
-		bus_io_write_1(bc, ioh, com_ier, sc->sc_ier);
+		bus_space_write_1(iot, ioh, com_ier, sc->sc_ier);
 
-		sc->sc_msr = bus_io_read_1(bc, ioh, com_msr);
+		sc->sc_msr = bus_space_read_1(iot, ioh, com_msr);
 		if (ISSET(sc->sc_swflags, COM_SW_SOFTCAR) || DEVCUA(dev) ||
 		    ISSET(sc->sc_msr, MSR_DCD) || ISSET(tp->t_cflag, MDMBUF))
 			SET(tp->t_state, TS_CARR_ON);
@@ -931,8 +971,8 @@ comclose(dev, flag, mode, p)
 	int unit = DEVUNIT(dev);
 	struct com_softc *sc = com_cd.cd_devs[unit];
 	struct tty *tp = sc->sc_tty;
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_io_handle_t ioh = sc->sc_ioh;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
 	int s;
 
 	/* XXX This is for cons.c. */
@@ -944,12 +984,12 @@ comclose(dev, flag, mode, p)
 	if (!ISSET(sc->sc_hwflags, COM_HW_ABSENT|COM_HW_ABSENT_PENDING)) {
 		/* can't do any of this stuff .... */
 		CLR(sc->sc_lcr, LCR_SBREAK);
-		bus_io_write_1(bc, ioh, com_lcr, sc->sc_lcr);
-		bus_io_write_1(bc, ioh, com_ier, 0);
+		bus_space_write_1(iot, ioh, com_lcr, sc->sc_lcr);
+		bus_space_write_1(iot, ioh, com_ier, 0);
 		if (ISSET(tp->t_cflag, HUPCL) &&
 		    !ISSET(sc->sc_swflags, COM_SW_SOFTCAR)) {
 			/* XXX perhaps only clear DTR */
-			bus_io_write_1(bc, ioh, com_mcr, 0);
+			bus_space_write_1(iot, ioh, com_mcr, 0);
 		}
 	}
 	CLR(tp->t_state, TS_BUSY | TS_FLUSH);
@@ -1047,8 +1087,8 @@ comioctl(dev, cmd, data, flag, p)
 	int unit = DEVUNIT(dev);
 	struct com_softc *sc = com_cd.cd_devs[unit];
 	struct tty *tp = sc->sc_tty;
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_io_handle_t ioh = sc->sc_ioh;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
 	int error;
 
 	if (ISSET(sc->sc_hwflags, COM_HW_ABSENT|COM_HW_ABSENT_PENDING)) {
@@ -1068,29 +1108,29 @@ comioctl(dev, cmd, data, flag, p)
 	switch (cmd) {
 	case TIOCSBRK:
 		SET(sc->sc_lcr, LCR_SBREAK);
-		bus_io_write_1(bc, ioh, com_lcr, sc->sc_lcr);
+		bus_space_write_1(iot, ioh, com_lcr, sc->sc_lcr);
 		break;
 	case TIOCCBRK:
 		CLR(sc->sc_lcr, LCR_SBREAK);
-		bus_io_write_1(bc, ioh, com_lcr, sc->sc_lcr);
+		bus_space_write_1(iot, ioh, com_lcr, sc->sc_lcr);
 		break;
 	case TIOCSDTR:
 		SET(sc->sc_mcr, sc->sc_dtr);
-		bus_io_write_1(bc, ioh, com_mcr, sc->sc_mcr);
+		bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr);
 		break;
 	case TIOCCDTR:
 		CLR(sc->sc_mcr, sc->sc_dtr);
-		bus_io_write_1(bc, ioh, com_mcr, sc->sc_mcr);
+		bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr);
 		break;
 	case TIOCMSET:
 		CLR(sc->sc_mcr, MCR_DTR | MCR_RTS);
 	case TIOCMBIS:
 		SET(sc->sc_mcr, tiocm_xxx2mcr(*(int *)data));
-		bus_io_write_1(bc, ioh, com_mcr, sc->sc_mcr);
+		bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr);
 		break;
 	case TIOCMBIC:
 		CLR(sc->sc_mcr, tiocm_xxx2mcr(*(int *)data));
-		bus_io_write_1(bc, ioh, com_mcr, sc->sc_mcr);
+		bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr);
 		break;
 	case TIOCMGET: {
 		u_char m;
@@ -1110,7 +1150,7 @@ comioctl(dev, cmd, data, flag, p)
 			SET(bits, TIOCM_DSR);
 		if (ISSET(m, MSR_RI | MSR_TERI))
 			SET(bits, TIOCM_RI);
-		if (bus_io_read_1(bc, ioh, com_ier))
+		if (bus_space_read_1(iot, ioh, com_ier))
 			SET(bits, TIOCM_LE);
 		*(int *)data = bits;
 		break;
@@ -1165,8 +1205,8 @@ comparam(tp, t)
 	struct termios *t;
 {
 	struct com_softc *sc = com_cd.cd_devs[DEVUNIT(tp->t_dev)];
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_io_handle_t ioh = sc->sc_ioh;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
 	int ospeed = comspeed(t->c_ospeed);
 	u_char lcr;
 	tcflag_t oldcflag;
@@ -1213,7 +1253,7 @@ comparam(tp, t)
 
 	if (ospeed == 0) {
 		CLR(sc->sc_mcr, MCR_DTR);
-		bus_io_write_1(bc, ioh, com_mcr, sc->sc_mcr);
+		bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr);
 	}
 
 	/*
@@ -1246,34 +1286,34 @@ comparam(tp, t)
 				}
 			}
 
-			bus_io_write_1(bc, ioh, com_lcr, lcr | LCR_DLAB);
-			bus_io_write_1(bc, ioh, com_dlbl, ospeed);
-			bus_io_write_1(bc, ioh, com_dlbh, ospeed >> 8);
-			bus_io_write_1(bc, ioh, com_lcr, lcr);
+			bus_space_write_1(iot, ioh, com_lcr, lcr | LCR_DLAB);
+			bus_space_write_1(iot, ioh, com_dlbl, ospeed);
+			bus_space_write_1(iot, ioh, com_dlbh, ospeed >> 8);
+			bus_space_write_1(iot, ioh, com_lcr, lcr);
 			SET(sc->sc_mcr, MCR_DTR);
-			bus_io_write_1(bc, ioh, com_mcr, sc->sc_mcr);
+			bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr);
 		} else
-			bus_io_write_1(bc, ioh, com_lcr, lcr);
+			bus_space_write_1(iot, ioh, com_lcr, lcr);
 
 		if (!ISSET(sc->sc_hwflags, COM_HW_HAYESP) &&
 		    ISSET(sc->sc_hwflags, COM_HW_FIFO))
-			bus_io_write_1(bc, ioh, com_fifo,
+			bus_space_write_1(iot, ioh, com_fifo,
 			    FIFO_ENABLE |
 			    (t->c_ispeed <= 1200 ? FIFO_TRIGGER_1 : FIFO_TRIGGER_8));
 	} else
-		bus_io_write_1(bc, ioh, com_lcr, lcr);
+		bus_space_write_1(iot, ioh, com_lcr, lcr);
 
 	/* When not using CRTSCTS, RTS follows DTR. */
 	if (!ISSET(t->c_cflag, CRTSCTS)) {
 		if (ISSET(sc->sc_mcr, MCR_DTR)) {
 			if (!ISSET(sc->sc_mcr, MCR_RTS)) {
 				SET(sc->sc_mcr, MCR_RTS);
-				bus_io_write_1(bc, ioh, com_mcr, sc->sc_mcr);
+				bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr);
 			}
 		} else {
 			if (ISSET(sc->sc_mcr, MCR_RTS)) {
 				CLR(sc->sc_mcr, MCR_RTS);
-				bus_io_write_1(bc, ioh, com_mcr, sc->sc_mcr);
+				bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr);
 			}
 		}
 		sc->sc_dtr = MCR_DTR | MCR_RTS;
@@ -1295,7 +1335,7 @@ comparam(tp, t)
 	    ISSET(oldcflag, MDMBUF) != ISSET(tp->t_cflag, MDMBUF) &&
 	    (*linesw[tp->t_line].l_modem)(tp, 0) == 0) {
 		CLR(sc->sc_mcr, sc->sc_dtr);
-		bus_io_write_1(bc, ioh, com_mcr, sc->sc_mcr);
+		bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr);
 	}
 
 	/* Just to be sure... */
@@ -1321,8 +1361,8 @@ comstart(tp)
 	struct tty *tp;
 {
 	struct com_softc *sc = com_cd.cd_devs[DEVUNIT(tp->t_dev)];
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_io_handle_t ioh = sc->sc_ioh;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
 	int s;
 
 	s = spltty();
@@ -1356,14 +1396,14 @@ comstart(tp)
 
 	if (!ISSET(sc->sc_ier, IER_ETXRDY)) {
 		SET(sc->sc_ier, IER_ETXRDY);
-		bus_io_write_1(bc, ioh, com_ier, sc->sc_ier);
+		bus_space_write_1(iot, ioh, com_ier, sc->sc_ier);
 	}
 #ifdef COM_HAYESP
 	if (ISSET(sc->sc_hwflags, COM_HW_HAYESP)) {
 		u_char buffer[1024], *cp = buffer;
 		int n = q_to_b(&tp->t_outq, cp, sizeof buffer);
 		do
-			bus_io_write_1(bc, ioh, com_data, *cp++);
+			bus_space_write_1(iot, ioh, com_data, *cp++);
 		while (--n);
 	}
 	else
@@ -1372,17 +1412,17 @@ comstart(tp)
 		u_char buffer[16], *cp = buffer;
 		int n = q_to_b(&tp->t_outq, cp, sizeof buffer);
 		do {
-			bus_io_write_1(bc, ioh, com_data, *cp++);
+			bus_space_write_1(iot, ioh, com_data, *cp++);
 		} while (--n);
 	} else
-		bus_io_write_1(bc, ioh, com_data, getc(&tp->t_outq));
+		bus_space_write_1(iot, ioh, com_data, getc(&tp->t_outq));
 out:
 	splx(s);
 	return;
 stopped:
 	if (ISSET(sc->sc_ier, IER_ETXRDY)) {
 		CLR(sc->sc_ier, IER_ETXRDY);
-		bus_io_write_1(bc, ioh, com_ier, sc->sc_ier);
+		bus_space_write_1(iot, ioh, com_ier, sc->sc_ier);
 	}
 	splx(s);
 }
@@ -1484,7 +1524,7 @@ compoll(arg)
 		    !ISSET(sc->sc_mcr, MCR_RTS)) {
 			/* XXX */
 			SET(sc->sc_mcr, MCR_RTS);
-			bus_io_write_1(sc->sc_bc, sc->sc_ioh, com_mcr,
+			bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_mcr,
 			    sc->sc_mcr);
 		}
 
@@ -1512,8 +1552,8 @@ comintr(arg)
 	void *arg;
 {
 	struct com_softc *sc = arg;
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_io_handle_t ioh = sc->sc_ioh;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
 	struct tty *tp;
 	u_char lsr, data, msr, delta;
 #ifdef COM_DEBUG
@@ -1528,10 +1568,10 @@ comintr(arg)
 
 #ifdef COM_DEBUG
 	n = 0;
-	if (ISSET(iter[n].iir = bus_io_read_1(bc, ioh, com_iir), IIR_NOPEND))
+	if (ISSET(iter[n].iir = bus_space_read_1(iot, ioh, com_iir), IIR_NOPEND))
 		return (0);
 #else
-	if (ISSET(bus_io_read_1(bc, ioh, com_iir), IIR_NOPEND))
+	if (ISSET(bus_space_read_1(iot, ioh, com_iir), IIR_NOPEND))
 		return (0);
 #endif
 
@@ -1541,14 +1581,14 @@ comintr(arg)
 #ifdef COM_DEBUG
 		iter[n].lsr =
 #endif
-		lsr = bus_io_read_1(bc, ioh, com_lsr);
+		lsr = bus_space_read_1(iot, ioh, com_lsr);
 
 		if (ISSET(lsr, LSR_RXRDY)) {
 			register u_char *p = sc->sc_ibufp;
 
 			comevents = 1;
 			do {
-				data = bus_io_read_1(bc, ioh, com_data);
+				data = bus_space_read_1(iot, ioh, com_data);
 				if (ISSET(lsr, LSR_BI)) {
 #ifdef notdef
 					printf("break %02x %02x %02x %02x\n",
@@ -1575,7 +1615,7 @@ comintr(arg)
 					    ISSET(tp->t_cflag, CRTSCTS)) {
 						/* XXX */
 						CLR(sc->sc_mcr, MCR_RTS);
-						bus_io_write_1(bc, ioh, com_mcr,
+						bus_space_write_1(iot, ioh, com_mcr,
 						    sc->sc_mcr);
 					}
 				}
@@ -1587,7 +1627,7 @@ comintr(arg)
 					goto ohfudge;
 				iter[n].lsr =
 #endif
-				lsr = bus_io_read_1(bc, ioh, com_lsr);
+				lsr = bus_space_read_1(iot, ioh, com_lsr);
 			} while (ISSET(lsr, LSR_RXRDY));
 
 			sc->sc_ibufp = p;
@@ -1600,7 +1640,7 @@ comintr(arg)
 #ifdef COM_DEBUG
 		iter[n].msr =
 #endif
-		msr = bus_io_read_1(bc, ioh, com_msr);
+		msr = bus_space_read_1(iot, ioh, com_msr);
 
 		if (msr != sc->sc_msr) {
 			delta = msr ^ sc->sc_msr;
@@ -1609,7 +1649,7 @@ comintr(arg)
 			    !ISSET(sc->sc_swflags, COM_SW_SOFTCAR) &&
 			    (*linesw[tp->t_line].l_modem)(tp, ISSET(msr, MSR_DCD)) == 0) {
 				CLR(sc->sc_mcr, sc->sc_dtr);
-				bus_io_write_1(bc, ioh, com_mcr, sc->sc_mcr);
+				bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr);
 			}
 			if (ISSET(delta & msr, MSR_CTS) &&
 			    ISSET(tp->t_cflag, CRTSCTS)) {
@@ -1628,10 +1668,10 @@ comintr(arg)
 #ifdef COM_DEBUG
 		if (++n >= 32)
 			goto ohfudge;
-		if (ISSET(iter[n].iir = bus_io_read_1(bc, ioh, com_iir), IIR_NOPEND))
+		if (ISSET(iter[n].iir = bus_space_read_1(iot, ioh, com_iir), IIR_NOPEND))
 			return (1);
 #else
-		if (ISSET(bus_io_read_1(bc, ioh, com_iir), IIR_NOPEND))
+		if (ISSET(bus_space_read_1(iot, ioh, com_iir), IIR_NOPEND))
 			return (1);
 #endif
 	}
@@ -1661,16 +1701,24 @@ comcnprobe(cp)
 	struct consdev *cp;
 {
 	/* XXX NEEDS TO BE FIXED XXX */
-	bus_chipset_tag_t bc = 0;
-	bus_io_handle_t ioh;
+	bus_space_tag_t iot = 0;
+	bus_space_handle_t ioh;
 	int found;
+#if NCOM_PICA
+	/* XXX */
+#include <arc/arc/arctype.h>
+	extern int cputype;
+
+	if(cputype != ACER_PICA_61)
+		return;
+#endif
 
-	if (bus_io_map(bc, CONADDR, COM_NPORTS, &ioh)) {
+	if (bus_space_map(iot, CONADDR, COM_NPORTS, 0, &ioh)) {
 		cp->cn_pri = CN_DEAD;
 		return;
 	}
-	found = comprobe1(bc, ioh, CONADDR);
-	bus_io_unmap(bc, ioh, COM_NPORTS);
+	found = comprobe1(iot, ioh, CONADDR);
+	bus_space_unmap(iot, ioh, COM_NPORTS);
 	if (!found) {
 		cp->cn_pri = CN_DEAD;
 		return;
@@ -1697,33 +1745,33 @@ comcninit(cp)
 
 #if 0
 	XXX NEEDS TO BE FIXED XXX
-	comconsbc = ???;
+	comconsiot = ???;
 #endif
-	if (bus_io_map(comconsbc, CONADDR, COM_NPORTS, &comconsioh))
+	if (bus_space_map(comconsiot, CONADDR, COM_NPORTS, 0, &comconsioh))
 		panic("comcninit: mapping failed");
 
-	cominit(comconsbc, comconsioh, comdefaultrate);
+	cominit(comconsiot, comconsioh, comdefaultrate);
 	comconsaddr = CONADDR;
 	comconsinit = 0;
 }
 
 void
-cominit(bc, ioh, rate)
-	bus_chipset_tag_t bc;
-	bus_io_handle_t ioh;
+cominit(iot, ioh, rate)
+	bus_space_tag_t iot;
+	bus_space_handle_t ioh;
 	int rate;
 {
 	int s = splhigh();
 	u_char stat;
 
-	bus_io_write_1(bc, ioh, com_lcr, LCR_DLAB);
+	bus_space_write_1(iot, ioh, com_lcr, LCR_DLAB);
 	rate = comspeed(comdefaultrate);
-	bus_io_write_1(bc, ioh, com_dlbl, rate);
-	bus_io_write_1(bc, ioh, com_dlbh, rate >> 8);
-	bus_io_write_1(bc, ioh, com_lcr, LCR_8BITS);
-	bus_io_write_1(bc, ioh, com_ier, IER_ERXRDY | IER_ETXRDY);
-	bus_io_write_1(bc, ioh, com_fifo, FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | FIFO_TRIGGER_4);
-	stat = bus_io_read_1(bc, ioh, com_iir);
+	bus_space_write_1(iot, ioh, com_dlbl, rate);
+	bus_space_write_1(iot, ioh, com_dlbh, rate >> 8);
+	bus_space_write_1(iot, ioh, com_lcr, LCR_8BITS);
+	bus_space_write_1(iot, ioh, com_ier, IER_ERXRDY | IER_ETXRDY);
+	bus_space_write_1(iot, ioh, com_fifo, FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | FIFO_TRIGGER_4);
+	stat = bus_space_read_1(iot, ioh, com_iir);
 	splx(s);
 }
 
@@ -1732,14 +1780,14 @@ comcngetc(dev)
 	dev_t dev;
 {
 	int s = splhigh();
-	bus_chipset_tag_t bc = comconsbc;
-	bus_io_handle_t ioh = comconsioh;
+	bus_space_tag_t iot = comconsiot;
+	bus_space_handle_t ioh = comconsioh;
 	u_char stat, c;
 
-	while (!ISSET(stat = bus_io_read_1(bc, ioh, com_lsr), LSR_RXRDY))
+	while (!ISSET(stat = bus_space_read_1(iot, ioh, com_lsr), LSR_RXRDY))
 		;
-	c = bus_io_read_1(bc, ioh, com_data);
-	stat = bus_io_read_1(bc, ioh, com_iir);
+	c = bus_space_read_1(iot, ioh, com_data);
+	stat = bus_space_read_1(iot, ioh, com_iir);
 	splx(s);
 	return c;
 }
@@ -1753,8 +1801,8 @@ comcnputc(dev, c)
 	int c;
 {
 	int s = splhigh();
-	bus_chipset_tag_t bc = comconsbc;
-	bus_io_handle_t ioh = comconsioh;
+	bus_space_tag_t iot = comconsiot;
+	bus_space_handle_t ioh = comconsioh;
 	u_char stat;
 	register int timo;
 
@@ -1762,20 +1810,20 @@ comcnputc(dev, c)
 	if (dev != kgdb_dev)
 #endif
 	if (comconsinit == 0) {
-		cominit(bc, ioh, comdefaultrate);
+		cominit(iot, ioh, comdefaultrate);
 		comconsinit = 1;
 	}
 	/* wait for any pending transmission to finish */
 	timo = 50000;
-	while (!ISSET(stat = bus_io_read_1(bc, ioh, com_lsr), LSR_TXRDY) && --timo)
+	while (!ISSET(stat = bus_space_read_1(iot, ioh, com_lsr), LSR_TXRDY) && --timo)
 		;
-	bus_io_write_1(bc, ioh, com_data, c);
+	bus_space_write_1(iot, ioh, com_data, c);
 	/* wait for this transmission to complete */
 	timo = 1500000;
-	while (!ISSET(stat = bus_io_read_1(bc, ioh, com_lsr), LSR_TXRDY) && --timo)
+	while (!ISSET(stat = bus_space_read_1(iot, ioh, com_lsr), LSR_TXRDY) && --timo)
 		;
 	/* clear any interrupts generated by this transmission */
-	stat = bus_io_read_1(bc, ioh, com_iir);
+	stat = bus_space_read_1(iot, ioh, com_iir);
 	splx(s);
 }
 
diff --git a/sys/dev/isa/comvar.h b/sys/dev/isa/comvar.h
index ece4b98bb73..6895af5d813 100644
--- a/sys/dev/isa/comvar.h
+++ b/sys/dev/isa/comvar.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: comvar.h,v 1.4 1996/10/30 15:01:50 niklas Exp $	*/
+/*	$OpenBSD: comvar.h,v 1.5 1996/11/29 22:54:52 niklas Exp $	*/
 /*	$NetBSD: comvar.h,v 1.5 1996/05/05 19:50:47 christos Exp $	*/
 
 /*
@@ -34,18 +34,18 @@
 struct commulti_attach_args {
 	int		ca_slave;		/* slave number */
 
-	bus_chipset_tag_t ca_bc;
-	bus_io_handle_t ca_ioh;
+	bus_space_tag_t ca_iot;
+	bus_space_handle_t ca_ioh;
 	int		ca_iobase;
 	int		ca_noien;
 };
 
-int comprobe1 __P((bus_chipset_tag_t, bus_io_handle_t, int));
-void cominit __P((bus_chipset_tag_t, bus_io_handle_t, int));
+int comprobe1 __P((bus_space_tag_t, bus_space_handle_t, int));
+void cominit __P((bus_space_tag_t, bus_space_handle_t, int));
 int comintr __P((void *));
 
 extern int comconsaddr;
 extern int comconsattached;
-extern bus_chipset_tag_t comconsbc;
-extern bus_io_handle_t comconsioh;
+extern bus_space_tag_t comconsiot;
+extern bus_space_handle_t comconsioh;
 extern tcflag_t comconscflag;
diff --git a/sys/dev/isa/cy_isa.c b/sys/dev/isa/cy_isa.c
index d7b810b57ce..11c8a4abb65 100644
--- a/sys/dev/isa/cy_isa.c
+++ b/sys/dev/isa/cy_isa.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: cy_isa.c,v 1.2 1996/11/12 20:30:28 niklas Exp $	*/
+/*	$OpenBSD: cy_isa.c,v 1.3 1996/11/29 22:54:53 niklas Exp $	*/
 
 /*
  * cy.c
@@ -38,7 +38,7 @@
 #include <sys/device.h>
 #include <sys/malloc.h>
 #include <sys/systm.h>
-#include <machine/bus.old.h>
+#include <machine/bus.h>
 #include <dev/isa/isavar.h>
 #include <dev/isa/isareg.h>
 
@@ -46,8 +46,8 @@
 #include <dev/ic/cyreg.h>
 
 int cy_probe_isa __P((struct device *, void *, void *));
-int cy_probe_common __P((int card, bus_chipset_tag_t,
-			 bus_mem_handle_t, int bustype));
+int cy_probe_common __P((int card, bus_space_tag_t,
+			 bus_space_handle_t, int bustype));
 
 void cyattach __P((struct device *, struct device *, void *));
 
@@ -65,20 +65,20 @@ cy_probe_isa(parent, match, aux)
 {
   int card = ((struct device *)match)->dv_unit;
   struct isa_attach_args *ia = aux;
-  bus_chipset_tag_t bc;
-  bus_mem_handle_t memh;
+  bus_space_tag_t memt;
+  bus_space_handle_t memh;
 
   if(ia->ia_irq == IRQUNK) {
     printf("cy%d error: interrupt not defined\n", card);
     return 0;
   }
 
-  bc = ia->ia_bc;
-  if(bus_mem_map(bc, ia->ia_maddr, 0x2000, 0, &memh) != 0)
+  memt = ia->ia_memt;
+  if(bus_space_map(memt, ia->ia_maddr, 0x2000, 0, &memh) != 0)
     return 0;
 
-  if(cy_probe_common(card, bc, memh, CY_BUSTYPE_ISA) == 0) {
-    bus_mem_unmap(bc, memh, 0x2000);
+  if(cy_probe_common(card, memt, memh, CY_BUSTYPE_ISA) == 0) {
+    bus_space_unmap(memt, memh, 0x2000);
     return 0;
   }
 
diff --git a/sys/dev/isa/elink.c b/sys/dev/isa/elink.c
index 6f738fac5b8..2705ea7be4f 100644
--- a/sys/dev/isa/elink.c
+++ b/sys/dev/isa/elink.c
@@ -39,7 +39,7 @@
 #include <sys/malloc.h>
 #include <sys/queue.h>
 
-#include <machine/bus.old.h>
+#include <machine/bus.h>
 
 #include <dev/isa/elink.h>
 
@@ -64,9 +64,9 @@ static int elink_all_resets_initialized;
  * NOTE: the caller MUST provide an i/o handle for ELINK_ID_PORT!
  */
 void
-elink_reset(bc, ioh, bus)
-	bus_chipset_tag_t bc;
-	bus_io_handle_t ioh;
+elink_reset(iot, ioh, bus)
+	bus_space_tag_t iot;
+	bus_space_handle_t ioh;
 	int bus;
 {
 	struct elink_done_reset *er;
@@ -94,11 +94,11 @@ elink_reset(bc, ioh, bus)
 	LIST_INSERT_HEAD(&elink_all_resets, er, er_link);
 
 	/* Haven't reset the cards on this bus, yet. */
-	bus_io_write_1(bc, ioh, 0, ELINK_RESET);
+	bus_space_write_1(iot, ioh, 0, ELINK_RESET);
 
  out:
-	bus_io_write_1(bc, ioh, 0, 0x00);
-	bus_io_write_1(bc, ioh, 0, 0x00);
+	bus_space_write_1(iot, ioh, 0, 0x00);
+	bus_space_write_1(iot, ioh, 0, 0x00);
 }
 
 /*
@@ -108,9 +108,9 @@ elink_reset(bc, ioh, bus)
  * NOTE: the caller MUST provide an i/o handle for ELINK_ID_PORT!
  */
 void
-elink_idseq(bc, ioh, p)
-	bus_chipset_tag_t bc;
-	bus_io_handle_t ioh;
+elink_idseq(iot, ioh, p)
+	bus_space_tag_t iot;
+	bus_space_handle_t ioh;
 	register u_char p;
 {
 	register int i;
@@ -118,7 +118,7 @@ elink_idseq(bc, ioh, p)
 
 	c = 0xff;
 	for (i = 255; i; i--) {
-		bus_io_write_1(bc, ioh, 0, c);
+		bus_space_write_1(iot, ioh, 0, c);
 		if (c & 0x80) {
 			c <<= 1;
 			c ^= p;
diff --git a/sys/dev/isa/elink.h b/sys/dev/isa/elink.h
index e4934ef09d0..8284f39c38b 100644
--- a/sys/dev/isa/elink.h
+++ b/sys/dev/isa/elink.h
@@ -35,5 +35,5 @@
 #define	ELINK_507_POLY	0xe7
 #define	ELINK_509_POLY	0xcf
 
-void elink_reset __P((bus_chipset_tag_t, bus_io_handle_t, int));
-void elink_idseq __P((bus_chipset_tag_t, bus_io_handle_t, u_char p));
+void elink_reset __P((bus_space_tag_t, bus_space_handle_t, int));
+void elink_idseq __P((bus_space_tag_t, bus_space_handle_t, u_char p));
diff --git a/sys/dev/isa/fd.c b/sys/dev/isa/fd.c
index d5aee45735c..06b6c7256b1 100644
--- a/sys/dev/isa/fd.c
+++ b/sys/dev/isa/fd.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: fd.c,v 1.28 1996/11/12 20:30:31 niklas Exp $	*/
+/*	$OpenBSD: fd.c,v 1.29 1996/11/29 22:54:55 niklas Exp $	*/
 /*	$NetBSD: fd.c,v 1.90 1996/05/12 23:12:03 mycroft Exp $	*/
 
 /*-
@@ -64,7 +64,7 @@
 #include <sys/queue.h>
 
 #include <machine/cpu.h>
-#include <machine/bus.old.h>
+#include <machine/bus.h>
 #include <machine/conf.h>
 #include <machine/intr.h>
 #include <machine/ioctl_fd.h>
@@ -166,8 +166,8 @@ fdprobe(parent, match, aux)
 	struct cfdata *cf = match;
 	struct fdc_attach_args *fa = aux;
 	int drive = fa->fa_drive;
-	bus_chipset_tag_t bc = fdc->sc_bc;
-	bus_io_handle_t ioh = fdc->sc_ioh;
+	bus_space_tag_t iot = fdc->sc_iot;
+	bus_space_handle_t ioh = fdc->sc_ioh;
 	int n;
 
 	if (cf->cf_loc[0] != -1 && cf->cf_loc[0] != drive)
@@ -186,14 +186,14 @@ fdprobe(parent, match, aux)
 	fa->fa_flags = cf->cf_flags;
 
 	/* select drive and turn on motor */
-	bus_io_write_1(bc, ioh, fdout, drive | FDO_FRST | FDO_MOEN(drive));
+	bus_space_write_1(iot, ioh, fdout, drive | FDO_FRST | FDO_MOEN(drive));
 	/* wait for motor to spin up */
 	delay(250000);
-	out_fdc(bc, ioh, NE7CMD_RECAL);
-	out_fdc(bc, ioh, drive);
+	out_fdc(iot, ioh, NE7CMD_RECAL);
+	out_fdc(iot, ioh, drive);
 	/* wait for recalibrate */
 	delay(2000000);
-	out_fdc(bc, ioh, NE7CMD_SENSEI);
+	out_fdc(iot, ioh, NE7CMD_SENSEI);
 	n = fdcresult(fdc);
 #ifdef FD_DEBUG
 	{
@@ -207,7 +207,7 @@ fdprobe(parent, match, aux)
 	if (n != 2 || (fdc->sc_status[0] & 0xf8) != 0x20)
 		return 0;
 	/* turn off motor */
-	bus_io_write_1(bc, ioh, fdout, FDO_FRST);
+	bus_space_write_1(iot, ioh, fdout, FDO_FRST);
 
 	return 1;
 }
@@ -478,7 +478,7 @@ fd_set_motor(fdc, reset)
 		if ((fd = fdc->sc_link.fdlink.sc_fd[n])
 		    && (fd->sc_flags & FD_MOTOR))
 			status |= FDO_MOEN(n);
-	bus_io_write_1(fdc->sc_bc, fdc->sc_ioh, fdout, status);
+	bus_space_write_1(fdc->sc_iot, fdc->sc_ioh, fdout, status);
 }
 
 void
@@ -588,8 +588,8 @@ fdintr(fdc)
 #define	cyl	fdc->sc_status[1]
 	struct fd_softc *fd;
 	struct buf *bp;
-	bus_chipset_tag_t bc = fdc->sc_bc;
-	bus_io_handle_t ioh = fdc->sc_ioh;
+	bus_space_tag_t iot = fdc->sc_iot;
+	bus_space_handle_t ioh = fdc->sc_ioh;
 	int read, head, sec, i, nblks;
 	struct fd_type *type;
 	struct fd_formb *finfo = NULL;
@@ -651,13 +651,13 @@ loop:
 		if (fd->sc_cylin == bp->b_cylin)
 			goto doio;
 
-		out_fdc(bc, ioh, NE7CMD_SPECIFY);/* specify command */
-		out_fdc(bc, ioh, fd->sc_type->steprate);
-		out_fdc(bc, ioh, 6);		/* XXX head load time == 6ms */
+		out_fdc(iot, ioh, NE7CMD_SPECIFY);/* specify command */
+		out_fdc(iot, ioh, fd->sc_type->steprate);
+		out_fdc(iot, ioh, 6);		/* XXX head load time == 6ms */
 
-		out_fdc(bc, ioh, NE7CMD_SEEK);	/* seek function */
-		out_fdc(bc, ioh, fd->sc_drive);	/* drive number */
-		out_fdc(bc, ioh, bp->b_cylin * fd->sc_type->step);
+		out_fdc(iot, ioh, NE7CMD_SEEK);	/* seek function */
+		out_fdc(iot, ioh, fd->sc_drive);	/* drive number */
+		out_fdc(iot, ioh, bp->b_cylin * fd->sc_type->step);
 
 		fd->sc_cylin = -1;
 		fdc->sc_state = SEEKWAIT;
@@ -700,7 +700,7 @@ loop:
 		isa_dmastart(read, bp->b_data + fd->sc_skip, fd->sc_nbytes,
 		    fdc->sc_drq);
 #endif
-		bus_io_write_1(bc, ioh, fdctl, type->rate);
+		bus_space_write_1(iot, ioh, fdctl, type->rate);
 #ifdef FD_DEBUG
 		printf("fdintr: %s drive %d track %d head %d sec %d nblks %d\n",
 		    read ? "read" : "write", fd->sc_drive, fd->sc_cylin, head,
@@ -708,29 +708,29 @@ loop:
 #endif
 		if (finfo) {
                         /* formatting */
-			if (out_fdc(bc, ioh, NE7CMD_FORMAT) < 0) {
+			if (out_fdc(iot, ioh, NE7CMD_FORMAT) < 0) {
 			    fdc->sc_errors = 4;
 			    fdretry(fd);
 			    goto loop;
 			}
-                        out_fdc(bc, ioh, (head << 2) | fd->sc_drive);
-                        out_fdc(bc, ioh, finfo->fd_formb_secshift);
-                        out_fdc(bc, ioh, finfo->fd_formb_nsecs);
-                        out_fdc(bc, ioh, finfo->fd_formb_gaplen);
-                        out_fdc(bc, ioh, finfo->fd_formb_fillbyte);
+                        out_fdc(iot, ioh, (head << 2) | fd->sc_drive);
+                        out_fdc(iot, ioh, finfo->fd_formb_secshift);
+                        out_fdc(iot, ioh, finfo->fd_formb_nsecs);
+                        out_fdc(iot, ioh, finfo->fd_formb_gaplen);
+                        out_fdc(iot, ioh, finfo->fd_formb_fillbyte);
 		} else {
 			if (read)
-				out_fdc(bc, ioh, NE7CMD_READ);	/* READ */
+				out_fdc(iot, ioh, NE7CMD_READ);	/* READ */
 			else
-				out_fdc(bc, ioh, NE7CMD_WRITE);	/* WRITE */
-			out_fdc(bc, ioh, (head << 2) | fd->sc_drive);
-			out_fdc(bc, ioh, fd->sc_cylin);		/* track */
-			out_fdc(bc, ioh, head);
-			out_fdc(bc, ioh, sec + 1);		/* sector +1 */
-			out_fdc(bc, ioh, type->secsize);	/* sector size */
-			out_fdc(bc, ioh, type->sectrac);	/* sectors/track */
-			out_fdc(bc, ioh, type->gap1);		/* gap1 size */
-			out_fdc(bc, ioh, type->datalen);	/* data length */
+				out_fdc(iot, ioh, NE7CMD_WRITE);/* WRITE */
+			out_fdc(iot, ioh, (head << 2) | fd->sc_drive);
+			out_fdc(iot, ioh, fd->sc_cylin);	/* track */
+			out_fdc(iot, ioh, head);
+			out_fdc(iot, ioh, sec + 1);		/* sec +1 */
+			out_fdc(iot, ioh, type->secsize);	/* sec size */
+			out_fdc(iot, ioh, type->sectrac);	/* secs/track */
+			out_fdc(iot, ioh, type->gap1);		/* gap1 size */
+			out_fdc(iot, ioh, type->datalen);	/* data len */
 		}
 		fdc->sc_state = IOCOMPLETE;
 
@@ -751,7 +751,7 @@ loop:
 		disk_unbusy(&fd->sc_dk, 0);	/* no data on seek */
 
 		/* Make sure seek really happened. */
-		out_fdc(bc, ioh, NE7CMD_SENSEI);
+		out_fdc(iot, ioh, NE7CMD_SENSEI);
 		if (fdcresult(fdc) != 2 || (st0 & 0xf8) != 0x20 ||
 		    cyl != bp->b_cylin * fd->sc_type->step) {
 #ifdef FD_DEBUG
@@ -831,14 +831,14 @@ loop:
 		untimeout(fdtimeout, fd);
 		/* clear the controller output buffer */
 		for (i = 0; i < 4; i++) {
-			out_fdc(bc, ioh, NE7CMD_SENSEI);
+			out_fdc(iot, ioh, NE7CMD_SENSEI);
 			(void) fdcresult(fdc);
 		}
 
 		/* fall through */
 	case DORECAL:
-		out_fdc(bc, ioh, NE7CMD_RECAL);	/* recalibrate function */
-		out_fdc(bc, ioh, fd->sc_drive);
+		out_fdc(iot, ioh, NE7CMD_RECAL);	/* recal function */
+		out_fdc(iot, ioh, fd->sc_drive);
 		fdc->sc_state = RECALWAIT;
 		timeout(fdtimeout, fd, 5 * hz);
 		return 1;			/* will return later */
@@ -851,7 +851,7 @@ loop:
 		return 1;			/* will return later */
 
 	case RECALCOMPLETE:
-		out_fdc(bc, ioh, NE7CMD_SENSEI);
+		out_fdc(iot, ioh, NE7CMD_SENSEI);
 		if (fdcresult(fdc) != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) {
 #ifdef FD_DEBUG
 			fdcstatus(&fd->sc_dev, 2, "recalibrate failed");
diff --git a/sys/dev/isa/fdc.c b/sys/dev/isa/fdc.c
index a53d72e2c49..28a2e4ac1d6 100644
--- a/sys/dev/isa/fdc.c
+++ b/sys/dev/isa/fdc.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: fdc.c,v 1.7 1996/11/23 21:46:40 kstailey Exp $	*/
+/*	$OpenBSD: fdc.c,v 1.8 1996/11/29 22:54:55 niklas Exp $	*/
 /*	$NetBSD: fd.c,v 1.90 1996/05/12 23:12:03 mycroft Exp $	*/
 
 /*-
@@ -63,7 +63,7 @@
 #include <sys/queue.h>
 
 #include <machine/cpu.h>
-#include <machine/bus.old.h>
+#include <machine/bus.h>
 #include <machine/conf.h>
 #include <machine/intr.h>
 #include <machine/ioctl_fd.h>
@@ -105,41 +105,43 @@ fdcprobe(parent, match, aux)
 	void *match, *aux;
 {
 	register struct isa_attach_args *ia = aux;
-	bus_chipset_tag_t bc;
-	bus_io_handle_t ioh;
+	bus_space_tag_t iot;
+	bus_space_handle_t ioh;
 	int rv;
 
-	bc = ia->ia_bc;
+	iot = ia->ia_iot;
 	rv = 0;
 
+#ifdef NEWCONFIG
+	if (ia->ia_iobase == IOBASEUNK || ia->ia_drq == DRQUNK)
+		return 0;
+#endif
+
 	/* Map the i/o space. */
-	if (bus_io_map(bc, ia->ia_iobase, FDC_NPORT, &ioh))
+	if (bus_space_map(iot, ia->ia_iobase, FDC_NPORT, 0, &ioh))
 		return 0;
 
 	/* reset */
-	bus_io_write_1(bc, ioh, fdout, 0);
+	bus_space_write_1(iot, ioh, fdout, 0);
 	delay(100);
-	bus_io_write_1(bc, ioh, fdout, FDO_FRST);
+	bus_space_write_1(iot, ioh, fdout, FDO_FRST);
 
 	/* see if it can handle a command */
-	if (out_fdc(bc, ioh, NE7CMD_SPECIFY) < 0)
+	if (out_fdc(iot, ioh, NE7CMD_SPECIFY) < 0)
 		goto out;
-	out_fdc(bc, ioh, 0xdf);
-	out_fdc(bc, ioh, 2);
+	out_fdc(iot, ioh, 0xdf);
+	out_fdc(iot, ioh, 2);
 
 #ifdef NEWCONFIG
-	if (ia->ia_iobase == IOBASEUNK || ia->ia_drq == DRQUNK)
-		return 0;
-
 	if (ia->ia_irq == IRQUNK) {
 		ia->ia_irq = isa_discoverintr(fdcforceintr, aux);
 		if (ia->ia_irq == IRQNONE)
 			goto out;
 
 		/* reset it again */
-		bus_io_write_1(bc, ioh, fdout, 0);
+		bus_space_write_1(iot, ioh, fdout, 0);
 		delay(100);
-		bus_io_write_1(bc, ioh, fdout, FDO_FRST);
+		bus_space_write_1(iot, ioh, fdout, FDO_FRST);
 	}
 #endif
 
@@ -148,7 +150,7 @@ fdcprobe(parent, match, aux)
 	ia->ia_msize = 0;
 
  out:
-	bus_io_unmap(bc, ioh, FDC_NPORT);
+	bus_space_unmap(iot, ioh, FDC_NPORT);
 	return rv;
 }
 
@@ -166,9 +168,9 @@ fdcforceintr(aux)
 
 	/* the motor is off; this should generate an error with or
 	   without a disk drive present */
-	out_fdc(bc, ioh, NE7CMD_SEEK);
-	out_fdc(bc, ioh, 0);
-	out_fdc(bc, ioh, 0);
+	out_fdc(iot, ioh, NE7CMD_SEEK);
+	out_fdc(iot, ioh, 0);
+	out_fdc(iot, ioh, 0);
 }
 #endif
 
@@ -178,19 +180,19 @@ fdcattach(parent, self, aux)
 	void *aux;
 {
 	struct fdc_softc *fdc = (void *)self;
-	bus_chipset_tag_t bc;
-	bus_io_handle_t ioh;
+	bus_space_tag_t iot;
+	bus_space_handle_t ioh;
 	struct isa_attach_args *ia = aux;
 	struct fdc_attach_args fa;
 	int type;
 
-	bc = ia->ia_bc;
+	iot = ia->ia_iot;
 
 	/* Re-map the I/O space. */
-	if (bus_io_map(bc, ia->ia_iobase, FDC_NPORT, &ioh))
+	if (bus_space_map(iot, ia->ia_iobase, FDC_NPORT, 0, &ioh))
 		panic("fdcattach: couldn't map I/O ports");
 
-	fdc->sc_bc = bc;
+	fdc->sc_iot = iot;
 	fdc->sc_ioh = ioh;
 
 	fdc->sc_drq = ia->ia_drq;
@@ -255,13 +257,13 @@ int
 fdcresult(fdc)
 	struct fdc_softc *fdc;
 {
-	bus_chipset_tag_t bc = fdc->sc_bc;
-	bus_io_handle_t ioh = fdc->sc_ioh;
+	bus_space_tag_t iot = fdc->sc_iot;
+	bus_space_handle_t ioh = fdc->sc_ioh;
 	u_char i;
 	int j = 100000, n = 0;
 
 	for (; j; j--) {
-		i = bus_io_read_1(bc, ioh, fdsts) &
+		i = bus_space_read_1(iot, ioh, fdsts) &
 		    (NE7_DIO | NE7_RQM | NE7_CB);
 		if (i == NE7_RQM)
 			return n;
@@ -270,7 +272,7 @@ fdcresult(fdc)
 				log(LOG_ERR, "fdcresult: overrun\n");
 				return -1;
 			}
-			fdc->sc_status[n++] = bus_io_read_1(bc, ioh, fddata);
+			fdc->sc_status[n++] = bus_space_read_1(iot, ioh, fddata);
 		}
 	}
 	log(LOG_ERR, "fdcresult: timeout\n");
@@ -278,20 +280,20 @@ fdcresult(fdc)
 }
 
 int
-out_fdc(bc, ioh, x)
-	bus_chipset_tag_t bc;
-	bus_io_handle_t ioh;
+out_fdc(iot, ioh, x)
+	bus_space_tag_t iot;
+	bus_space_handle_t ioh;
 	u_char x;
 {
 	int i = 100000;
 
-	while ((bus_io_read_1(bc, ioh, fdsts) & NE7_DIO) && i-- > 0);
+	while ((bus_space_read_1(iot, ioh, fdsts) & NE7_DIO) && i-- > 0);
 	if (i <= 0)
 		return -1;
-	while ((bus_io_read_1(bc, ioh, fdsts) & NE7_RQM) == 0 && i-- > 0);
+	while ((bus_space_read_1(iot, ioh, fdsts) & NE7_RQM) == 0 && i-- > 0);
 	if (i <= 0)
 		return -1;
-	bus_io_write_1(bc, ioh, fddata, x);
+	bus_space_write_1(iot, ioh, fddata, x);
 	return 0;
 }
 
@@ -320,7 +322,7 @@ fdcstatus(dv, n, s)
 	struct fdc_softc *fdc = (void *)dv->dv_parent;
 
 	if (n == 0) {
-		out_fdc(fdc->sc_bc, fdc->sc_ioh, NE7CMD_SENSEI);
+		out_fdc(fdc->sc_iot, fdc->sc_ioh, NE7CMD_SENSEI);
 		(void) fdcresult(fdc);
 		n = 2;
 	}
diff --git a/sys/dev/isa/fdlink.h b/sys/dev/isa/fdlink.h
index 27e6d8d77a9..b04b2007c31 100644
--- a/sys/dev/isa/fdlink.h
+++ b/sys/dev/isa/fdlink.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: fdlink.h,v 1.2 1996/10/28 00:06:22 downsj Exp $	*/
+/*	$OpenBSD: fdlink.h,v 1.3 1996/11/29 22:54:56 niklas Exp $	*/
 
 /*-
  * Copyright (c) 1993, 1994, 1995 Charles Hannum.
@@ -90,8 +90,8 @@ struct fdc_softc {
 	struct isadev sc_id;
 	void *sc_ih;
 
-	bus_chipset_tag_t sc_bc;	/* ISA chipset identifier */
-	bus_io_handle_t   sc_ioh;	/* ISA io handle */
+	bus_space_tag_t sc_iot;		/* ISA chipset identifier */
+	bus_space_handle_t sc_ioh;	/* ISA io handle */
 
 	int sc_drq;
 
@@ -116,11 +116,11 @@ struct fdc_attach_args {
 };
 
 /* Functions from fdc.c. */
-int fdcresult __P((struct fdc_softc *fdc));
-int out_fdc __P((bus_chipset_tag_t bc, bus_io_handle_t ioh, u_char x));
-void fdcstart __P((struct fdc_softc *fdc));
-void fdcstatus __P((struct device *dv, int n, char *s));
-void fdcpseudointr __P((void *arg));
+int fdcresult __P((struct fdc_softc *));
+int out_fdc __P((bus_space_tag_t, bus_space_handle_t, u_char));
+void fdcstart __P((struct fdc_softc *));
+void fdcstatus __P((struct device *, int, char *));
+void fdcpseudointr __P((void *));
 
 /* Functions from fd.c. */
 struct fd_type *fd_nvtotype __P((char *, int, int));
diff --git a/sys/dev/isa/files.isa b/sys/dev/isa/files.isa
index 56b28effd36..50d38eb8293 100644
--- a/sys/dev/isa/files.isa
+++ b/sys/dev/isa/files.isa
@@ -1,4 +1,4 @@
-#	$OpenBSD: files.isa,v 1.27 1996/08/14 14:36:14 shawn Exp $
+#	$OpenBSD: files.isa,v 1.28 1996/11/29 22:54:57 niklas Exp $
 #	$NetBSD: files.isa,v 1.21 1996/05/16 03:45:55 mycroft Exp $
 #
 # Config.new file and device description for machine-independent ISA code.
@@ -60,7 +60,7 @@ device	com: tty
 attach	com at isa with com_isa
 attach	com at commulti with com_commulti
 attach	com at pcmcia with com_pcmcia
-file	dev/isa/com.c			com & (com_isa | com_commulti | com_pcmcia) needs-flag
+file	dev/isa/com.c			com & (com_isa | com_commulti | com_pcmcia | com_pica) needs-flag
 
 # Cyclades Cyclom multiport serial cards
 attach	cy at isa with cy_isa
@@ -69,7 +69,8 @@ file	dev/isa/cy_isa.c		cy_isa
 # PC parallel ports (XXX what chip?)
 device	lpt
 attach	lpt at isa with lpt_isa
-file	dev/isa/lpt.c			lpt needs-flag
+file	dev/isa/lpt.c			lpt & (lpt_isa | lpt_pica) needs-flag
+file	dev/isa/lpt_isa.c		lpt_isa needs-flag
 
 #
 # SCSI host adapters
@@ -96,9 +97,9 @@ attach	sea at isa
 file	dev/isa/seagate.c		sea
 
 # UltraStor UHA-[13]4f boards
-device	uha: scsi, isa_dma
-attach	uha at isa
-file	dev/isa/ultra14f.c		uha
+# device declaration in sys/conf/files
+attach	uha at isa with uha_isa: isa_dma
+file	dev/isa/uha_isa.c		uha_isa
 
 # Western Digital WD7000 and Future Domain TMC-7000 boards
 device	wds: scsi, isa_dma
diff --git a/sys/dev/isa/if_ed.c b/sys/dev/isa/if_ed.c
index 976993f5416..dd814df825d 100644
--- a/sys/dev/isa/if_ed.c
+++ b/sys/dev/isa/if_ed.c
@@ -1,5 +1,5 @@
-/*	$OpenBSD: if_ed.c,v 1.24 1996/11/12 20:30:34 niklas Exp $	*/
-/*	$NetBSD: if_ed.c,v 1.100 1996/05/12 23:52:19 mycroft Exp $	*/
+/*	$OpenBSD: if_ed.c,v 1.25 1996/11/29 22:54:58 niklas Exp $	*/
+/*	$NetBSD: if_ed.c,v 1.105 1996/10/21 22:40:45 thorpej Exp $	*/
 
 /*
  * Device driver for National Semiconductor DS8390/WD83C690 based ethernet
@@ -49,7 +49,7 @@
 #endif
 
 #include <machine/cpu.h>
-#include <machine/bus.old.h>
+#include <machine/bus.h>
 #include <machine/intr.h>
 
 #include <dev/isa/isareg.h>
@@ -62,10 +62,10 @@
  */
 struct ed_softc {
 	struct	device sc_dev;
-	void *sc_ih;
+	void	*sc_ih;
 
 	struct	arpcom sc_arpcom;	/* ethernet common */
-	void *sc_sh;			/* shutdown hook */
+	void	*sc_sh;			/* shutdown hook */
 
 	char	*type_str;	/* pointer to type string */
 	u_char	vendor;		/* interface vendor */
@@ -75,13 +75,15 @@ struct ed_softc {
 #define ED_NOTPRESENT 	0x0002	/* card not present; do not allow
 				   reconfiguration */
 
-	bus_chipset_tag_t sc_bc;  /* bus identifier */
-	bus_io_handle_t sc_ioh;   /* io handle */
-	bus_io_handle_t sc_delayioh; /* io handle for `delay port' */
-	bus_mem_handle_t sc_memh; /* bus memory handle */
+	bus_space_tag_t sc_iot; /* bus identifier */
+	bus_space_tag_t sc_memt;
+	bus_space_handle_t sc_ioh;   /* io handle */
+	bus_space_handle_t sc_delaybah; /* io handle for `delay port' */
+	bus_space_handle_t sc_memh; /* bus memory handle */
+	isa_chipset_tag_t sc_ic;
 
-	bus_io_size_t	asic_base;	/* offset of ASIC I/O port */
-	bus_io_size_t	nic_base;	/* offset of NIC (DS8390) I/O port */
+	bus_size_t	asic_base;	/* offset of ASIC I/O port */
+	bus_size_t	nic_base;	/* offset of NIC (DS8390) I/O port */
 
 /*
  * The following 'proto' variable is part of a work-around for 8013EBT asics
@@ -119,7 +121,7 @@ int edprobe __P((struct device *, void *, void *));
 void edattach __P((struct device *, struct device *, void *));
 int ed_find __P((struct ed_softc *, struct cfdata *,
     struct isa_attach_args *ia));
-int ed_probe_generic8390 __P((bus_chipset_tag_t, bus_io_handle_t, int));
+int ed_probe_generic8390 __P((bus_space_tag_t, bus_space_handle_t, int));
 int ed_find_WD80x3 __P((struct ed_softc *, struct cfdata *,
     struct isa_attach_args *ia));
 int ed_find_3Com __P((struct ed_softc *, struct cfdata *,
@@ -142,9 +144,9 @@ void ed_shared_readmem __P((struct ed_softc *, int, caddr_t, int));
 void ed_getmcaf __P((struct arpcom *, u_long *));
 void edread __P((struct ed_softc *, int, int));
 struct mbuf *edget __P((struct ed_softc *, int, int));
-static inline void ed_rint __P((struct ed_softc *));
-static inline void ed_xmit __P((struct ed_softc *));
-static inline int ed_ring_copy __P((struct ed_softc *, int, caddr_t,
+static __inline void ed_rint __P((struct ed_softc *));
+static __inline void ed_xmit __P((struct ed_softc *));
+static __inline int ed_ring_copy __P((struct ed_softc *, int, caddr_t,
 					u_short));
 
 void ed_pio_readmem __P((struct ed_softc *, u_short, caddr_t, u_short));
@@ -176,16 +178,14 @@ struct cfattach ed_pcmcia_ca = {
 	sizeof(struct ed_softc), ed_pcmcia_match, edattach, ed_pcmcia_detach
 };
 
-static int ed_pcmcia_isa_attach __P((struct device *, void *,
-				     void *, struct pcmcia_link *));
-
-static int edmod __P((struct pcmcia_link *, struct device *,
-		      struct pcmcia_conf *, struct cfdata *cf));
-
-static int ed_remove __P((struct pcmcia_link *, struct device *));
+int ed_pcmcia_isa_attach __P((struct device *, void *, void *,
+    struct pcmcia_link *));
+int edmod __P((struct pcmcia_link *, struct device *, struct pcmcia_conf *,
+    struct cfdata *cf));
+int ed_remove __P((struct pcmcia_link *, struct device *));
 
 /* additional setup needed for pcmcia devices */
-static int
+int
 ed_pcmcia_isa_attach(parent, match, aux, pc_link)
 	struct device *parent;
 	void *match;
@@ -230,13 +230,14 @@ ed_pcmcia_isa_attach(parent, match, aux, pc_link)
 		sc->spec_flags=pc_link->flags&PCMCIA_REATTACH?ED_REATTACH:0;
 		sc->type_str = dev->model;
 		sc->sc_arpcom.ac_if.if_snd.ifq_maxlen=ifqmaxlen;
+		sc->sc_ic = ia->ia_ic;
 		return 1;
 	} else
 	    return 0;
 }
 
 /* modify config entry */
-static int
+int
 edmod(pc_link, self, pc_cf, cf) 
 	struct pcmcia_link *pc_link;
 	struct device *self;
@@ -274,8 +275,7 @@ edmod(pc_link, self, pc_cf, cf)
 	return err;
 }
 
-
-static int
+int
 ed_remove(pc_link,self) 
 	struct pcmcia_link *pc_link;
 	struct device *self;
@@ -287,7 +287,7 @@ ed_remove(pc_link,self)
 	shutdownhook_disestablish(sc->sc_sh);
 	ifp->if_flags &= ~(IFF_RUNNING|IFF_UP);
 	sc->spec_flags |= ED_NOTPRESENT;
-	isa_intr_disestablish(sc->sc_bc, sc->sc_ih);
+	isa_intr_disestablish(sc->sc_ic, sc->sc_ih);
 	return PCMCIA_BUS_UNCONFIG(pc_link->adapter, pc_link);
 }
 
@@ -362,10 +362,10 @@ ed_pcmcia_detach(self)
 
 #endif
 
-#define	NIC_PUT(bc, ioh, nic, reg, val)	\
-	bus_io_write_1((bc), (ioh), ((nic) + (reg)), (val))
-#define	NIC_GET(bc, ioh, nic, reg)	\
-	bus_io_read_1((bc), (ioh), ((nic) + (reg)))
+#define	NIC_PUT(t, bah, nic, reg, val)	\
+	bus_space_write_1((t), (bah), ((nic) + (reg)), (val))
+#define	NIC_GET(t, bah, nic, reg)	\
+	bus_space_read_1((t), (bah), ((nic) + (reg)))
 
 /*
  * Determine if the device is present.
@@ -422,17 +422,17 @@ ed_find(sc, cf, ia)
  * Return 1 if 8390 was found, 0 if not.
  */
 int
-ed_probe_generic8390(bc, ioh, nicbase)
-	bus_chipset_tag_t bc;
-	bus_io_handle_t ioh;
+ed_probe_generic8390(t, bah, nicbase)
+	bus_space_tag_t t;
+	bus_space_handle_t bah;
 	int nicbase;
 {
 
-	if ((NIC_GET(bc, ioh, nicbase, ED_P0_CR) &
+	if ((NIC_GET(t, bah, nicbase, ED_P0_CR) &
 	     (ED_CR_RD2 | ED_CR_TXP | ED_CR_STA | ED_CR_STP)) !=
 	    (ED_CR_RD2 | ED_CR_STP))
 		return (0);
-	if ((NIC_GET(bc, ioh, nicbase, ED_P0_ISR) & ED_ISR_RST) != ED_ISR_RST)
+	if ((NIC_GET(t, bah, nicbase, ED_P0_ISR) & ED_ISR_RST) != ED_ISR_RST)
 		return (0);
 
 	return (1);
@@ -450,23 +450,25 @@ ed_find_WD80x3(sc, cf, ia)
 	struct cfdata *cf;
 	struct isa_attach_args *ia;
 {
-	bus_chipset_tag_t bc;
-	bus_io_handle_t ioh;
-	bus_io_handle_t delayioh = ia->ia_delayioh;
-	bus_mem_handle_t memh;
+	bus_space_tag_t iot;
+	bus_space_tag_t memt;
+	bus_space_handle_t ioh;
+	bus_space_handle_t delaybah = ia->ia_delaybah;
+	bus_space_handle_t memh;
 	u_int memsize;
 	u_char iptr, isa16bit, sum;
 	int i, rv, memfail, mapped_mem = 0;
 	int asicbase, nicbase;
 
-	bc = ia->ia_bc;
+	iot = ia->ia_iot;
+	memt = ia->ia_memt;
 	rv = 0;
 
 	/* Set initial values for width/size. */
 	memsize = 8192;
 	isa16bit = 0;
 
-	if (bus_io_map(bc, ia->ia_iobase, ED_WD_IO_PORTS, &ioh))
+	if (bus_space_map(iot, ia->ia_iobase, ED_WD_IO_PORTS, 0, &ioh))
 		return (0);
 
 	sc->asic_base = asicbase = 0;
@@ -474,7 +476,7 @@ ed_find_WD80x3(sc, cf, ia)
 	sc->is790 = 0;
 
 #ifdef TOSH_ETHER
-	bus_io_write_1(bc, ioh, asicbase + ED_WD_MSR, ED_WD_MSR_POW);
+	bus_space_write_1(iot, ioh, asicbase + ED_WD_MSR, ED_WD_MSR_POW);
 	delay(10000);
 #endif
 
@@ -485,7 +487,7 @@ ed_find_WD80x3(sc, cf, ia)
 	 * Danpex boards for one.
 	 */
 	for (sum = 0, i = 0; i < 8; ++i)
-		sum += bus_io_read_1(bc, ioh, asicbase + ED_WD_PROM + i);
+		sum += bus_space_read_1(iot, ioh, asicbase + ED_WD_PROM + i);
 
 	if (sum != ED_WD_ROM_CHECKSUM_TOTAL) {
 		/*
@@ -493,27 +495,27 @@ ed_find_WD80x3(sc, cf, ia)
 		 * clones.  In this case, the checksum byte (the eighth byte)
 		 * seems to always be zero.
 		 */
-		if (bus_io_read_1(bc, ioh, asicbase + ED_WD_CARD_ID) !=
+		if (bus_space_read_1(iot, ioh, asicbase + ED_WD_CARD_ID) !=
 		    ED_TYPE_WD8003E ||
-		    bus_io_read_1(bc, ioh, asicbase + ED_WD_PROM + 7) != 0)
+		    bus_space_read_1(iot, ioh, asicbase + ED_WD_PROM + 7) != 0)
 			goto out;
 	}
 
 	/* Reset card to force it into a known state. */
 #ifdef TOSH_ETHER
-	bus_io_write_1(bc, ioh, asicbase + ED_WD_MSR,
+	bus_space_write_1(iot, ioh, asicbase + ED_WD_MSR,
 	    ED_WD_MSR_RST | ED_WD_MSR_POW);
 #else
-	bus_io_write_1(bc, ioh, asicbase + ED_WD_MSR, ED_WD_MSR_RST);
+	bus_space_write_1(iot, ioh, asicbase + ED_WD_MSR, ED_WD_MSR_RST);
 #endif
 	delay(100);
-	bus_io_write_1(bc, ioh, asicbase + ED_WD_MSR,
-	    bus_io_read_1(bc, ioh, asicbase + ED_WD_MSR) & ~ED_WD_MSR_RST);
+	bus_space_write_1(iot, ioh, asicbase + ED_WD_MSR,
+	    bus_space_read_1(iot, ioh, asicbase + ED_WD_MSR) & ~ED_WD_MSR_RST);
 	/* Wait in the case this card is reading it's EEROM. */
 	delay(5000);
 
 	sc->vendor = ED_VENDOR_WD_SMC;
-	sc->type = bus_io_read_1(bc, ioh, asicbase + ED_WD_CARD_ID);
+	sc->type = bus_space_read_1(iot, ioh, asicbase + ED_WD_CARD_ID);
 
 	switch (sc->type) {
 	case ED_TYPE_WD8003S:
@@ -539,7 +541,7 @@ ed_find_WD80x3(sc, cf, ia)
 		isa16bit = 1;
 		break;
 	case ED_TYPE_WD8013EP:		/* also WD8003EP */
-		if (bus_io_read_1(bc, ioh, asicbase + ED_WD_ICR)
+		if (bus_space_read_1(iot, ioh, asicbase + ED_WD_ICR)
 		    & ED_WD_ICR_16BIT) {
 			isa16bit = 1;
 			memsize = 16384;
@@ -565,11 +567,11 @@ ed_find_WD80x3(sc, cf, ia)
 	case ED_TYPE_SMC8216C:
 	case ED_TYPE_SMC8216T:
 		sc->type_str = (sc->type == ED_TYPE_SMC8216C) ?
-				"SMC8216/SMC8216C" : "SMC8216T";
-		bus_io_write_1(bc, ioh, asicbase + ED_WD790_HWR,
-			bus_io_read_1(bc, ioh, asicbase + ED_WD790_HWR)
-			| ED_WD790_HWR_SWH);
-		switch (bus_io_read_1(bc, ioh, asicbase + ED_WD790_RAR) &
+		    "SMC8216/SMC8216C" : "SMC8216T";
+		bus_space_write_1(iot, ioh, asicbase + ED_WD790_HWR,
+		    bus_space_read_1(iot, ioh, asicbase + ED_WD790_HWR)
+		    | ED_WD790_HWR_SWH);
+		switch (bus_space_read_1(iot, ioh, asicbase + ED_WD790_RAR) &
 		    ED_WD790_RAR_SZ64) {
 		case ED_WD790_RAR_SZ64:
 			memsize = 65536;
@@ -587,9 +589,9 @@ ed_find_WD80x3(sc, cf, ia)
 			memsize = 8192;
 			break;
 		}
-		bus_io_write_1(bc, ioh, asicbase + ED_WD790_HWR,
-			bus_io_read_1(bc, ioh,
-			asicbase + ED_WD790_HWR) & ~ED_WD790_HWR_SWH);
+		bus_space_write_1(iot, ioh, asicbase + ED_WD790_HWR,
+		    bus_space_read_1(iot, ioh, asicbase + ED_WD790_HWR) &
+		    ~ED_WD790_HWR_SWH);
 
 		isa16bit = 1;
 		sc->is790 = 1;
@@ -618,8 +620,8 @@ ed_find_WD80x3(sc, cf, ia)
 #ifdef TOSH_ETHER
 	    (sc->type != ED_TYPE_TOSHIBA1) && (sc->type != ED_TYPE_TOSHIBA4) &&
 #endif
-	    ((bus_io_read_1(bc, ioh,
-	      asicbase + ED_WD_ICR) & ED_WD_ICR_16BIT) == 0)) {
+	    ((bus_space_read_1(iot, ioh, asicbase + ED_WD_ICR) &
+	    ED_WD_ICR_16BIT) == 0)) {
 		isa16bit = 0;
 		memsize = 8192;
 	}
@@ -629,7 +631,8 @@ ed_find_WD80x3(sc, cf, ia)
 	    sc->type, sc->type_str ?: "unknown", isa16bit, memsize,
 	    ia->ia_msize);
 	for (i = 0; i < 8; i++)
-		printf("%x -> %x\n", i, inb(asicbase + i));
+		printf("%x -> %x\n", i, bus_space_read_1(iot, ioh,
+		    asicbase + i));
 #endif
 	/* Allow the user to override the autoconfiguration. */
 	if (ia->ia_msize)
@@ -649,14 +652,17 @@ ed_find_WD80x3(sc, cf, ia)
 	 */
 	if (sc->is790) {
 		u_char x;
+
 		/* Assemble together the encoded interrupt number. */
-		bus_io_write_1(bc, ioh, ED_WD790_HWR,
-		    bus_io_read_1(bc, ioh, ED_WD790_HWR) | ED_WD790_HWR_SWH);
-		x = bus_io_read_1(bc, ioh, ED_WD790_GCR);
+		bus_space_write_1(iot, ioh, ED_WD790_HWR,
+		    bus_space_read_1(iot, ioh, ED_WD790_HWR) |
+		    ED_WD790_HWR_SWH);
+		x = bus_space_read_1(iot, ioh, ED_WD790_GCR);
 		iptr = ((x & ED_WD790_GCR_IR2) >> 4) |
 		    ((x & (ED_WD790_GCR_IR1|ED_WD790_GCR_IR0)) >> 2);
-		bus_io_write_1(bc, ioh, ED_WD790_HWR,
-		    bus_io_read_1(bc, ioh, ED_WD790_HWR) & ~ED_WD790_HWR_SWH);
+		bus_space_write_1(iot, ioh, ED_WD790_HWR,
+		    bus_space_read_1(iot, ioh, ED_WD790_HWR) &
+		    ~ED_WD790_HWR_SWH);
 		/*
 		 * Translate it using translation table, and check for
 		 * correctness.
@@ -671,12 +677,14 @@ ed_find_WD80x3(sc, cf, ia)
 		} else
 			ia->ia_irq = ed_wd790_irq[iptr];
 		/* Enable the interrupt. */
-		bus_io_write_1(bc, ioh, ED_WD790_ICR,
-		    bus_io_read_1(bc, ioh, ED_WD790_ICR) | ED_WD790_ICR_EIL);
+		bus_space_write_1(iot, ioh, ED_WD790_ICR,
+		    bus_space_read_1(iot, ioh, ED_WD790_ICR) |
+		    ED_WD790_ICR_EIL);
 	} else if (sc->type & ED_WD_SOFTCONFIG) {
 		/* Assemble together the encoded interrupt number. */
-		iptr = (bus_io_read_1(bc, ioh, ED_WD_ICR) & ED_WD_ICR_IR2) |
-		    ((bus_io_read_1(bc, ioh, ED_WD_IRR) &
+		iptr = (bus_space_read_1(iot, ioh, ED_WD_ICR) &
+		    ED_WD_ICR_IR2) |
+		    ((bus_space_read_1(iot, ioh, ED_WD_IRR) &
 		      (ED_WD_IRR_IR0 | ED_WD_IRR_IR1)) >> 5);
 		/*
 		 * Translate it using translation table, and check for
@@ -692,8 +700,8 @@ ed_find_WD80x3(sc, cf, ia)
 		} else
 			ia->ia_irq = ed_wd584_irq[iptr];
 		/* Enable the interrupt. */
-		bus_io_write_1(bc, ioh, ED_WD_IRR,
-		    bus_io_read_1(bc, ioh, ED_WD_IRR) | ED_WD_IRR_IEN);
+		bus_space_write_1(iot, ioh, ED_WD_IRR,
+		    bus_space_read_1(iot, ioh, ED_WD_IRR) | ED_WD_IRR_IEN);
 	} else {
 		if (ia->ia_irq == IRQUNK) {
 			printf("%s: %s does not have soft configuration\n",
@@ -707,7 +715,7 @@ ed_find_WD80x3(sc, cf, ia)
 	sc->isa16bit = isa16bit;
 	sc->mem_shared = 1;
 	ia->ia_msize = memsize;
-	if (bus_mem_map(bc, ia->ia_maddr, memsize, 0, &memh))
+	if (bus_space_map(memt, ia->ia_maddr, memsize, 0, &memh))
 		goto out;
 	mapped_mem = 1;
 	sc->mem_start = 0;	/* offset */
@@ -728,7 +736,7 @@ ed_find_WD80x3(sc, cf, ia)
 	/* Get station address from on-board ROM. */
 	for (i = 0; i < ETHER_ADDR_LEN; ++i)
 		sc->sc_arpcom.ac_enaddr[i] =
-		    bus_io_read_1(bc, ioh, asicbase + ED_WD_PROM + i);
+		    bus_space_read_1(iot, ioh, asicbase + ED_WD_PROM + i);
 
 	/*
 	 * Set upper address bits and 8/16 bit access to shared memory.
@@ -736,15 +744,13 @@ ed_find_WD80x3(sc, cf, ia)
 	if (isa16bit) {
 		if (sc->is790) {
 			sc->wd_laar_proto =
-			    bus_io_read_1(bc, ioh, asicbase + ED_WD_LAAR) &
+			    bus_space_read_1(iot, ioh, asicbase + ED_WD_LAAR) &
 			    ~ED_WD_LAAR_M16EN;
 		} else {
-			sc->wd_laar_proto =
-			    ED_WD_LAAR_L16EN |
-			    ((ia->ia_maddr >> 19) &
-			    ED_WD_LAAR_ADDRHI);
+			sc->wd_laar_proto = ED_WD_LAAR_L16EN |
+			    ((ia->ia_maddr >> 19) & ED_WD_LAAR_ADDRHI);
 		}
-		bus_io_write_1(bc, ioh, asicbase + ED_WD_LAAR,
+		bus_space_write_1(iot, ioh, asicbase + ED_WD_LAAR,
 		    sc->wd_laar_proto | ED_WD_LAAR_M16EN);
 	} else  {
 		if ((sc->type & ED_WD_SOFTCONFIG) ||
@@ -756,7 +762,7 @@ ed_find_WD80x3(sc, cf, ia)
 			sc->wd_laar_proto =
 			    ((ia->ia_maddr >> 19) &
 			    ED_WD_LAAR_ADDRHI);
-			bus_io_write_1(bc, ioh, asicbase + ED_WD_LAAR,
+			bus_space_write_1(iot, ioh, asicbase + ED_WD_LAAR,
 			    sc->wd_laar_proto);
 		}
 	}
@@ -766,9 +772,9 @@ ed_find_WD80x3(sc, cf, ia)
 	 */
 	if (!sc->is790) {
 #ifdef TOSH_ETHER
-		bus_io_write_1(bc, ioh, asicbase + ED_WD_MSR + 1,
+		bus_space_write_1(iot, ioh, asicbase + ED_WD_MSR + 1,
 		    ((ia->ia_maddr >> 8) & 0xe0) | 4);
-		bus_io_write_1(bc, ioh, asicbase + ED_WD_MSR + 2,
+		bus_space_write_1(iot, ioh, asicbase + ED_WD_MSR + 2,
 		    ((ia->ia_maddr >> 16) & 0x0f));
 		sc->wd_msr_proto = ED_WD_MSR_POW;
 #else
@@ -777,43 +783,43 @@ ed_find_WD80x3(sc, cf, ia)
 #endif
 		sc->cr_proto = ED_CR_RD2;
 	} else {
-		bus_io_write_1(bc, ioh, asicbase + 0x04,
-		    bus_io_read_1(bc, ioh, asicbase + 0x04) | 0x80);
-		bus_io_write_1(bc, ioh, asicbase + 0x0b,
+		bus_space_write_1(iot, ioh, asicbase + 0x04,
+		    bus_space_read_1(iot, ioh, asicbase + 0x04) | 0x80);
+		bus_space_write_1(iot, ioh, asicbase + 0x0b,
 		    ((ia->ia_maddr >> 13) & 0x0f) |
 		    ((ia->ia_maddr >> 11) & 0x40) |
-		    (bus_io_read_1(bc, ioh, asicbase + 0x0b) & 0xb0));
-		bus_io_write_1(bc, ioh, asicbase + 0x04,
-		    bus_io_read_1(bc, ioh, asicbase + 0x04) & ~0x80);
+		    (bus_space_read_1(iot, ioh, asicbase + 0x0b) & 0xb0));
+		bus_space_write_1(iot, ioh, asicbase + 0x04,
+		    bus_space_read_1(iot, ioh, asicbase + 0x04) & ~0x80);
 		sc->wd_msr_proto = 0x00;
 		sc->cr_proto = 0;
 	}
-	bus_io_write_1(bc, ioh, asicbase + ED_WD_MSR,
+	bus_space_write_1(iot, ioh, asicbase + ED_WD_MSR,
 	    sc->wd_msr_proto | ED_WD_MSR_MENB);
 
-	(void) bus_io_read_1(bc, delayioh, 0);
-	(void) bus_io_read_1(bc, delayioh, 0);
+	(void) bus_space_read_1(iot, delaybah, 0);
+	(void) bus_space_read_1(iot, delaybah, 0);
 
 	/* Now zero memory and verify that it is clear. */
 	if (isa16bit) {
 		for (i = 0; i < memsize; i += 2)
-			bus_mem_write_2(bc, memh, sc->mem_start + i, 0);
+			bus_space_write_2(memt, memh, sc->mem_start + i, 0);
 	} else {
 		for (i = 0; i < memsize; ++i)
-			bus_mem_write_1(bc, memh, sc->mem_start + i, 0);
+			bus_space_write_1(memt, memh, sc->mem_start + i, 0);
 	}
 
 	memfail = 0;
 	if (isa16bit) {
 		for (i = 0; i < memsize; i += 2) {
-			if (bus_mem_read_2(bc, memh, sc->mem_start + i)) {
+			if (bus_space_read_2(memt, memh, sc->mem_start + i)) {
 				memfail = 1;
 				break;
 			}
 		}
 	} else {
 		for (i = 0; i < memsize; ++i) {
-			if (bus_mem_read_1(bc, memh, sc->mem_start + i)) {
+			if (bus_space_read_1(memt, memh, sc->mem_start + i)) {
 				memfail = 1;
 				break;
 			}
@@ -827,13 +833,13 @@ ed_find_WD80x3(sc, cf, ia)
 		    (ia->ia_maddr + sc->mem_start + i));
 
 		/* Disable 16 bit access to shared memory. */
-		bus_io_write_1(bc, ioh, asicbase + ED_WD_MSR,
+		bus_space_write_1(iot, ioh, asicbase + ED_WD_MSR,
 		    sc->wd_msr_proto);
 		if (isa16bit)
-			bus_io_write_1(bc, ioh, asicbase + ED_WD_LAAR,
+			bus_space_write_1(iot, ioh, asicbase + ED_WD_LAAR,
 			    sc->wd_laar_proto);
-		(void) bus_io_read_1(bc, delayioh, 0);
-		(void) bus_io_read_1(bc, delayioh, 0);
+		(void) bus_space_read_1(iot, delaybah, 0);
+		(void) bus_space_read_1(iot, delaybah, 0);
 		goto out;
 	}
 
@@ -845,12 +851,12 @@ ed_find_WD80x3(sc, cf, ia)
 	 * and 2) so that other 8 bit devices with shared memory can be
 	 * used in this 128k region, too.
 	 */
-	bus_io_write_1(bc, ioh, asicbase + ED_WD_MSR, sc->wd_msr_proto);
+	bus_space_write_1(iot, ioh, asicbase + ED_WD_MSR, sc->wd_msr_proto);
 	if (isa16bit)
-		bus_io_write_1(bc, ioh, asicbase + ED_WD_LAAR,
+		bus_space_write_1(iot, ioh, asicbase + ED_WD_LAAR,
 		    sc->wd_laar_proto);
-	(void) bus_io_read_1(bc, delayioh, 0);
-	(void) bus_io_read_1(bc, delayioh, 0);
+	(void) bus_space_read_1(iot, delaybah, 0);
+	(void) bus_space_read_1(iot, delaybah, 0);
 
 	ia->ia_iosize = ED_WD_IO_PORTS;
 	rv = 1;
@@ -861,20 +867,24 @@ ed_find_WD80x3(sc, cf, ia)
 	 * XXX Need to squish "indirect" first.
 	 */
 	if (rv == 0) {
-		bus_io_unmap(bc, ioh, ED_WD_IO_PORTS);
+		bus_space_unmap(iot, ioh, ED_WD_IO_PORTS);
 		if (mapped_mem)
-			bus_mem_unmap(bc, memh, memsize);
+			bus_space_unmap(memt, memh, memsize);
 	} else {
 		/* XXX this is all "indirect" brokenness */
-		sc->sc_bc = bc;
+		sc->sc_iot = iot;
+		sc->sc_memt = memt;
 		sc->sc_ioh = ioh;
 		sc->sc_memh = memh;
 	}
 	return (rv);
 }
 
-int ed_3com_iobase[] = {0x2e0, 0x2a0, 0x280, 0x250, 0x350, 0x330, 0x310, 0x300};
-int ed_3com_maddr[] = {MADDRUNK, MADDRUNK, MADDRUNK, MADDRUNK, 0xc8000, 0xcc000, 0xd8000, 0xdc000};
+int ed_3com_iobase[] =
+    {0x2e0, 0x2a0, 0x280, 0x250, 0x350, 0x330, 0x310, 0x300};
+int ed_3com_maddr[] = {
+    MADDRUNK, MADDRUNK, MADDRUNK, MADDRUNK, 0xc8000, 0xcc000, 0xd8000, 0xdc000
+};
 #if 0
 int ed_3com_irq[] = {IRQUNK, IRQUNK, IRQUNK, IRQUNK, 9, 3, 4, 5};
 #endif
@@ -888,9 +898,10 @@ ed_find_3Com(sc, cf, ia)
 	struct cfdata *cf;
 	struct isa_attach_args *ia;
 {
-	bus_chipset_tag_t bc;
-	bus_io_handle_t ioh;
-	bus_mem_handle_t memh;
+	bus_space_tag_t iot;
+	bus_space_tag_t memt;
+	bus_space_handle_t ioh;
+	bus_space_handle_t memh;
 	int i;
 	u_int memsize, memfail;
 	u_char isa16bit, x;
@@ -902,9 +913,10 @@ ed_find_3Com(sc, cf, ia)
 	 */
 	memsize = 8192;
 
-	bc = ia->ia_bc;
+	iot = ia->ia_iot;
+	memt = ia->ia_memt;
 
-	if (bus_io_map(bc, ia->ia_iobase, ED_WD_IO_PORTS, &ioh))
+	if (bus_space_map(iot, ia->ia_iobase, ED_3COM_IO_PORTS, 0, &ioh))
 		return (0);
 
 	sc->asic_base = asicbase = ED_3COM_ASIC_OFFSET;
@@ -918,7 +930,7 @@ ed_find_3Com(sc, cf, ia)
 	 * board is there; after all, we are already talking it at that
 	 * address.
 	 */
-	x = bus_io_read_1(bc, ioh, asicbase + ED_3COM_BCFR);
+	x = bus_space_read_1(iot, ioh, asicbase + ED_3COM_BCFR);
 	if (x == 0 || (x & (x - 1)) != 0)
 		goto err;
 	ptr = ffs(x) - 1;
@@ -932,9 +944,14 @@ ed_find_3Com(sc, cf, ia)
 	} else
 		ia->ia_iobase = ed_3com_iobase[ptr];	/* XXX --thorpej */
 
-	x = bus_io_read_1(bc, ioh, asicbase + ED_3COM_PCFR);
-	if (x == 0 || (x & (x - 1)) != 0)
+	x = bus_space_read_1(iot, ioh, asicbase + ED_3COM_PCFR);
+	if (x == 0 || (x & (x - 1)) != 0) {
+		printf("%s: The 3c503 is not currently supported with memory "
+		       "mapping disabled.\n%s: Reconfigure the card to "
+		       "enable memory mapping.\n",
+		       sc->sc_dev.dv_xname, sc->sc_dev.dv_xname);
 		goto err;
+	}
 	ptr = ffs(x) - 1;
 	if (ia->ia_maddr != MADDRUNK) {
 		if (ia->ia_maddr != ed_3com_maddr[ptr]) {
@@ -947,7 +964,7 @@ ed_find_3Com(sc, cf, ia)
 		ia->ia_maddr = ed_3com_maddr[ptr];
 
 #if 0
-	x = bus_io_read_1(bc, ioh, asicbase + ED_3COM_IDCFR) &
+	x = bus_space_read_1(iot, ioh, asicbase + ED_3COM_IDCFR) &
 	    ED_3COM_IDCFR_IRQ;
 	if (x == 0 || (x & (x - 1)) != 0)
 		goto out;
@@ -968,7 +985,7 @@ ed_find_3Com(sc, cf, ia)
 	 * sequence because it'll lock up if the cable isn't connected if we
 	 * don't.
 	 */
-	bus_io_write_1(bc, ioh, asicbase + ED_3COM_CR,
+	bus_space_write_1(iot, ioh, asicbase + ED_3COM_CR,
 	    ED_3COM_CR_RST | ED_3COM_CR_XSEL);
 
 	/* Wait for a while, then un-reset it. */
@@ -979,7 +996,7 @@ ed_find_3Com(sc, cf, ia)
 	 * reset - it's important to set it again after the following outb
 	 * (this is done when we map the PROM below).
 	 */
-	bus_io_write_1(bc, ioh, asicbase + ED_3COM_CR, ED_3COM_CR_XSEL);
+	bus_space_write_1(iot, ioh, asicbase + ED_3COM_CR, ED_3COM_CR_XSEL);
 
 	/* Wait a bit for the NIC to recover from the reset. */
 	delay(5000);
@@ -995,46 +1012,46 @@ ed_find_3Com(sc, cf, ia)
 	 * First, map ethernet address PROM over the top of where the NIC
 	 * registers normally appear.
 	 */
-	bus_io_write_1(bc, ioh, asicbase + ED_3COM_CR,
+	bus_space_write_1(iot, ioh, asicbase + ED_3COM_CR,
 	    ED_3COM_CR_EALO | ED_3COM_CR_XSEL);
 
 	for (i = 0; i < ETHER_ADDR_LEN; ++i)
-		sc->sc_arpcom.ac_enaddr[i] = NIC_GET(bc, ioh, nicbase, i);
+		sc->sc_arpcom.ac_enaddr[i] = NIC_GET(iot, ioh, nicbase, i);
 
 	/*
 	 * Unmap PROM - select NIC registers.  The proper setting of the
 	 * tranceiver is set in edinit so that the attach code is given a
 	 * chance to set the default based on a compile-time config option.
 	 */
-	bus_io_write_1(bc, ioh, asicbase + ED_3COM_CR, ED_3COM_CR_XSEL);
+	bus_space_write_1(iot, ioh, asicbase + ED_3COM_CR, ED_3COM_CR_XSEL);
 
 	/* Determine if this is an 8bit or 16bit board. */
 
 	/* Select page 0 registers. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_CR,
+	NIC_PUT(iot, ioh, nicbase, ED_P0_CR,
 	    ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STP);
 
 	/*
 	 * Attempt to clear WTS bit.  If it doesn't clear, then this is a
 	 * 16-bit board.
 	 */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_DCR, 0);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_DCR, 0);
 
 	/* Select page 2 registers. */
-	NIC_PUT(bc, ioh, nicbase,
+	NIC_PUT(iot, ioh, nicbase,
 	    ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_2 | ED_CR_STP);
 
 	/* The 3c503 forces the WTS bit to a one if this is a 16bit board. */
-	if (NIC_GET(bc, ioh, nicbase, ED_P2_DCR) & ED_DCR_WTS)
+	if (NIC_GET(iot, ioh, nicbase, ED_P2_DCR) & ED_DCR_WTS)
 		isa16bit = 1;
 	else
 		isa16bit = 0;
 
 	/* Select page 0 registers. */
-	NIC_PUT(bc, ioh, nicbase, ED_P2_CR,
+	NIC_PUT(iot, ioh, nicbase, ED_P2_CR,
 	    ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STP);
 
-	if (bus_mem_map(bc, ia->ia_maddr, memsize, 0, &memh))
+	if (bus_space_map(memt, ia->ia_maddr, memsize, 0, &memh))
 		goto err;
 	sc->mem_start = 0;		/* offset */
 	sc->mem_size = memsize;
@@ -1077,25 +1094,25 @@ ed_find_3Com(sc, cf, ia)
 	 * Initialize GA page start/stop registers.  Probably only needed if
 	 * doing DMA, but what the Hell.
 	 */
-	bus_io_write_1(bc, ioh, asicbase + ED_3COM_PSTR, sc->rec_page_start);
-	bus_io_write_1(bc, ioh, asicbase + ED_3COM_PSPR, sc->rec_page_stop);
+	bus_space_write_1(iot, ioh, asicbase + ED_3COM_PSTR, sc->rec_page_start);
+	bus_space_write_1(iot, ioh, asicbase + ED_3COM_PSPR, sc->rec_page_stop);
 
 	/* Set IRQ.  3c503 only allows a choice of irq 3-5 or 9. */
 	switch (ia->ia_irq) {
 	case 9:
-		bus_io_write_1(bc, ioh, asicbase + ED_3COM_IDCFR,
+		bus_space_write_1(iot, ioh, asicbase + ED_3COM_IDCFR,
 		    ED_3COM_IDCFR_IRQ2);
 		break;
 	case 3:
-		bus_io_write_1(bc, ioh, asicbase + ED_3COM_IDCFR,
+		bus_space_write_1(iot, ioh, asicbase + ED_3COM_IDCFR,
 		    ED_3COM_IDCFR_IRQ3);
 		break;
 	case 4:
-		bus_io_write_1(bc, ioh, asicbase + ED_3COM_IDCFR,
+		bus_space_write_1(iot, ioh, asicbase + ED_3COM_IDCFR,
 		    ED_3COM_IDCFR_IRQ4);
 		break;
 	case 5:
-		bus_io_write_1(bc, ioh, asicbase + ED_3COM_IDCFR,
+		bus_space_write_1(iot, ioh, asicbase + ED_3COM_IDCFR,
 		    ED_3COM_IDCFR_IRQ5);
 		break;
 	default:
@@ -1108,7 +1125,7 @@ ed_find_3Com(sc, cf, ia)
 	 * Initialize GA configuration register.  Set bank and enable shared
 	 * mem.
 	 */
-	bus_io_write_1(bc, ioh, asicbase + ED_3COM_GACFR,
+	bus_space_write_1(iot, ioh, asicbase + ED_3COM_GACFR,
 	    ED_3COM_GACFR_RSEL | ED_3COM_GACFR_MBS0);
 
 	/*
@@ -1117,30 +1134,30 @@ ed_find_3Com(sc, cf, ia)
 	 * shared memory is disabled. We set them to 0xffff0...allegedly the
 	 * reset vector.
 	 */
-	bus_io_write_1(bc, ioh, asicbase + ED_3COM_VPTR2, 0xff);
-	bus_io_write_1(bc, ioh, asicbase + ED_3COM_VPTR1, 0xff);
-	bus_io_write_1(bc, ioh, asicbase + ED_3COM_VPTR0, 0x00);
+	bus_space_write_1(iot, ioh, asicbase + ED_3COM_VPTR2, 0xff);
+	bus_space_write_1(iot, ioh, asicbase + ED_3COM_VPTR1, 0xff);
+	bus_space_write_1(iot, ioh, asicbase + ED_3COM_VPTR0, 0x00);
 
 	/* Now zero memory and verify that it is clear. */
 	if (isa16bit) {
 		for (i = 0; i < memsize; i += 2)
-			bus_mem_write_2(bc, memh, sc->mem_start + i, 0);
+			bus_space_write_2(memt, memh, sc->mem_start + i, 0);
 	} else {
 		for (i = 0; i < memsize; ++i)
-			bus_mem_write_1(bc, memh, sc->mem_start + i, 0);
+			bus_space_write_1(memt, memh, sc->mem_start + i, 0);
 	}
 
 	memfail = 0;
 	if (isa16bit) {
 		for (i = 0; i < memsize; i += 2) {
-			if (bus_mem_read_2(bc, memh, sc->mem_start + i)) {
+			if (bus_space_read_2(memt, memh, sc->mem_start + i)) {
 				memfail = 1;
 				break;
 			}
 		}
 	} else {
 		for (i = 0; i < memsize; ++i) {
-			if (bus_mem_read_1(bc, memh, sc->mem_start + i)) {
+			if (bus_space_read_1(memt, memh, sc->mem_start + i)) {
 				memfail = 1;
 				break;
 			}
@@ -1162,15 +1179,16 @@ ed_find_3Com(sc, cf, ia)
 	 * XXX Sould always unmap, but we can't yet.
 	 * XXX Need to squish "indirect" first.
 	 */
-	sc->sc_bc = bc;
+	sc->sc_iot = iot;
+	sc->sc_memt = memt;
 	sc->sc_ioh = ioh;
 	sc->sc_memh = memh;
 	return 1;
 
  out:
-	bus_mem_unmap(bc, memh, memsize);
+	bus_space_unmap(memt, memh, memsize);
  err:
-	bus_io_unmap(bc, ioh, ED_3COM_IO_PORTS);
+	bus_space_unmap(iot, ioh, ED_3COM_IO_PORTS);
 	return 0;
 }
 
@@ -1183,17 +1201,17 @@ ed_find_Novell(sc, cf, ia)
 	struct cfdata *cf;
 	struct isa_attach_args *ia;
 {
-	bus_chipset_tag_t bc;
-	bus_io_handle_t ioh;
+	bus_space_tag_t iot;
+	bus_space_handle_t ioh;
 	u_int memsize, n;
 	u_char romdata[16], tmp;
 	static u_char test_pattern[32] = "THIS is A memory TEST pattern";
 	u_char test_buffer[32];
 	int asicbase, nicbase;
 
-	bc = ia->ia_bc;
+	iot = ia->ia_iot;
 
-	if (bus_io_map(bc, ia->ia_iobase, ED_NOVELL_IO_PORTS, &ioh))
+	if (bus_space_map(iot, ia->ia_iobase, ED_NOVELL_IO_PORTS, 0, &ioh))
 		return (0);
 
 	sc->asic_base = asicbase = ED_NOVELL_ASIC_OFFSET;
@@ -1203,10 +1221,10 @@ ed_find_Novell(sc, cf, ia)
 
 	/* Reset the board. */
 #ifdef GWETHER
-	bus_io_write_1(bc, ioh, asicbase + ED_NOVELL_RESET, 0);
+	bus_space_write_1(iot, ioh, asicbase + ED_NOVELL_RESET, 0);
 	delay(200);
 #endif /* GWETHER */
-	tmp = bus_io_read_1(bc, ioh, asicbase + ED_NOVELL_RESET);
+	tmp = bus_space_read_1(iot, ioh, asicbase + ED_NOVELL_RESET);
 
 	/*
 	 * I don't know if this is necessary; probably cruft leftover from
@@ -1216,7 +1234,7 @@ ed_find_Novell(sc, cf, ia)
 	 * complete documentation on what the 'right' thing to do is...so we do
 	 * the invasive thing for now.  Yuck.]
 	 */
-	bus_io_write_1(bc, ioh, asicbase + ED_NOVELL_RESET, tmp);
+	bus_space_write_1(iot, ioh, asicbase + ED_NOVELL_RESET, tmp);
 	delay(5000);
 
 	/*
@@ -1225,13 +1243,13 @@ ed_find_Novell(sc, cf, ia)
 	 * XXX - this makes the probe invasive! ...Done against my better
 	 * judgement.  -DLG
 	 */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_CR,
+	NIC_PUT(iot, ioh, nicbase, ED_P0_CR,
 	    ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STP);
 
 	delay(5000);
 
 	/* Make sure that we really have an 8390 based board. */
-	if (!ed_probe_generic8390(bc, ioh, nicbase))
+	if (!ed_probe_generic8390(iot, ioh, nicbase))
 		goto out;
 
 	sc->vendor = ED_VENDOR_NOVELL;
@@ -1248,20 +1266,20 @@ ed_find_Novell(sc, cf, ia)
 	 * This prevents packets from being stored in the NIC memory when the
 	 * readmem routine turns on the start bit in the CR.
 	 */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_RCR, ED_RCR_MON);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_RCR, ED_RCR_MON);
 
 	/* Temporarily initialize DCR for byte operations. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS);
 
-	NIC_PUT(bc, ioh, nicbase, ED_P0_PSTART, 8192 >> ED_PAGE_SHIFT);
-	NIC_PUT(bc, ioh, nicbase, ED_P0_PSTOP, 16384 >> ED_PAGE_SHIFT);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_PSTART, 8192 >> ED_PAGE_SHIFT);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_PSTOP, 16384 >> ED_PAGE_SHIFT);
 
 	sc->isa16bit = 0;
 
 	/*
 	 * XXX indirect brokenness, used by ed_pio{read,write}mem()
 	 */
-	sc->sc_bc = bc;
+	sc->sc_iot = iot;
 	sc->sc_ioh = ioh;
 
 	/*
@@ -1275,10 +1293,10 @@ ed_find_Novell(sc, cf, ia)
 	if (bcmp(test_pattern, test_buffer, sizeof(test_pattern))) {
 		/* not an NE1000 - try NE2000 */
 
-		NIC_PUT(bc, ioh, nicbase, ED_P0_DCR,
+		NIC_PUT(iot, ioh, nicbase, ED_P0_DCR,
 		    ED_DCR_WTS | ED_DCR_FT1 | ED_DCR_LS);
-		NIC_PUT(bc, ioh, nicbase, ED_P0_PSTART, 16384 >> ED_PAGE_SHIFT);
-		NIC_PUT(bc, ioh, nicbase, ED_P0_PSTOP, 32768 >> ED_PAGE_SHIFT);
+		NIC_PUT(iot, ioh, nicbase, ED_P0_PSTART, 16384 >> ED_PAGE_SHIFT);
+		NIC_PUT(iot, ioh, nicbase, ED_P0_PSTOP, 32768 >> ED_PAGE_SHIFT);
 
 		sc->isa16bit = 1;
 
@@ -1403,7 +1421,7 @@ ed_find_Novell(sc, cf, ia)
 #endif /* GWETHER */
 
 	/* Clear any pending interrupts that might have occurred above. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_ISR, 0xff);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_ISR, 0xff);
 
 	ia->ia_iosize = ED_NOVELL_IO_PORTS;
 
@@ -1411,12 +1429,12 @@ ed_find_Novell(sc, cf, ia)
 	 * XXX Sould always unmap, but we can't yet.
 	 * XXX Need to squish "indirect" first.
 	 */
-	sc->sc_bc = bc;
+	sc->sc_iot = iot;
 	sc->sc_ioh = ioh;
 	/* sc_memh is not used by this driver */
 	return 1;
  out:
-	bus_io_unmap(bc, ioh, ED_NOVELL_IO_PORTS);
+	bus_space_unmap(iot, ioh, ED_NOVELL_IO_PORTS);
 
 	return 0;
 }
@@ -1429,8 +1447,8 @@ edattach(parent, self, aux)
 	struct device *parent, *self;
 	void *aux;
 {
-	bus_chipset_tag_t bc;
-	bus_io_handle_t ioh;
+	bus_space_tag_t iot;
+	bus_space_handle_t ioh;
 	struct ed_softc *sc = (void *)self;
 	struct isa_attach_args *ia = aux;
 	struct cfdata *cf = sc->sc_dev.dv_cfdata;
@@ -1441,11 +1459,11 @@ edattach(parent, self, aux)
 	 * XXX Should re-map io and mem, but can't
 	 * XXX until we squish "indirect" brokenness.
 	 */
-	bc = sc->sc_bc;			/* XXX */
+	iot = sc->sc_iot;		/* XXX */
 	ioh = sc->sc_ioh;		/* XXX */
 
 	asicbase = sc->asic_base;
-	sc->sc_delayioh = ia->ia_delayioh;
+	sc->sc_delaybah = ia->ia_delaybah;
 
 	/* Set interface to stopped condition (reset). */
 	edstop(sc);
@@ -1471,7 +1489,7 @@ edattach(parent, self, aux)
 	case ED_VENDOR_WD_SMC:
 		if ((sc->type & ED_WD_SOFTCONFIG) == 0)
 			break;
-		if ((bus_io_read_1(bc, ioh, asicbase + ED_WD_IRR) &
+		if ((bus_space_read_1(iot, ioh, asicbase + ED_WD_IRR) &
 		    ED_WD_IRR_OUT2) == 0)
 			ifp->if_flags |= IFF_LINK0;
 		break;
@@ -1542,13 +1560,13 @@ void
 edstop(sc)
 	struct ed_softc *sc;
 {
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_io_handle_t ioh = sc->sc_ioh;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
 	int nicbase = sc->nic_base;
 	int n = 5000;
 
 	/* Stop everything on the interface, and select page 0 registers. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_CR,
+	NIC_PUT(iot, ioh, nicbase, ED_P0_CR,
 	    sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STP);
 
 	/*
@@ -1556,7 +1574,7 @@ edstop(sc)
 	 * 'n' (about 5ms).  It shouldn't even take 5us on modern DS8390's, but
 	 * just in case it's an old one.
 	 */
-	while (((NIC_GET(bc, ioh, nicbase,
+	while (((NIC_GET(iot, ioh, nicbase,
 	    ED_P0_ISR) & ED_ISR_RST) == 0) && --n);
 }
 
@@ -1583,8 +1601,8 @@ void
 edinit(sc)
 	struct ed_softc *sc;
 {
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_io_handle_t ioh = sc->sc_ioh;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
 	struct ifnet *ifp = &sc->sc_arpcom.ac_if;
 	int nicbase = sc->nic_base, asicbase = sc->asic_base;
 	int i;
@@ -1604,7 +1622,7 @@ edinit(sc)
 	sc->txb_next_tx = 0;
 
 	/* Set interface for page 0, remote DMA complete, stopped. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_CR,
+	NIC_PUT(iot, ioh, nicbase, ED_P0_CR,
 	    sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STP);
 
 	if (sc->isa16bit) {
@@ -1612,37 +1630,37 @@ edinit(sc)
 		 * Set FIFO threshold to 8, No auto-init Remote DMA, byte
 		 * order=80x86, word-wide DMA xfers,
 		 */
-		NIC_PUT(bc, ioh, nicbase, ED_P0_DCR,
+		NIC_PUT(iot, ioh, nicbase, ED_P0_DCR,
 		    ED_DCR_FT1 | ED_DCR_WTS | ED_DCR_LS);
 	} else {
 		/* Same as above, but byte-wide DMA xfers. */
-		NIC_PUT(bc, ioh, nicbase, ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS);
+		NIC_PUT(iot, ioh, nicbase, ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS);
 	}
 
 	/* Clear remote byte count registers. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_RBCR0, 0);
-	NIC_PUT(bc, ioh, nicbase, ED_P0_RBCR1, 0);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_RBCR0, 0);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_RBCR1, 0);
 
 	/* Tell RCR to do nothing for now. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_RCR, ED_RCR_MON);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_RCR, ED_RCR_MON);
 
 	/* Place NIC in internal loopback mode. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_TCR, ED_TCR_LB0);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_TCR, ED_TCR_LB0);
 
 	/* Set lower bits of byte addressable framing to 0. */
 	if (sc->is790)
-		NIC_PUT(bc, ioh, nicbase, 0x09, 0);
+		NIC_PUT(iot, ioh, nicbase, 0x09, 0);
 
 	/* Initialize receive buffer ring. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_BNRY, sc->rec_page_start);
-	NIC_PUT(bc, ioh, nicbase, ED_P0_PSTART, sc->rec_page_start);
-	NIC_PUT(bc, ioh, nicbase, ED_P0_PSTOP, sc->rec_page_stop);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_BNRY, sc->rec_page_start);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_PSTART, sc->rec_page_start);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_PSTOP, sc->rec_page_stop);
 
 	/*
 	 * Clear all interrupts.  A '1' in each bit position clears the
 	 * corresponding flag.
 	 */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_ISR, 0xff);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_ISR, 0xff);
 
 	/*
 	 * Enable the following interrupts: receive/transmit complete,
@@ -1650,33 +1668,33 @@ edinit(sc)
 	 *
 	 * Counter overflow and Remote DMA complete are *not* enabled.
 	 */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_IMR,
+	NIC_PUT(iot, ioh, nicbase, ED_P0_IMR,
 	    ED_IMR_PRXE | ED_IMR_PTXE | ED_IMR_RXEE | ED_IMR_TXEE |
 	    ED_IMR_OVWE);
 
 	/* Program command register for page 1. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_CR,
+	NIC_PUT(iot, ioh, nicbase, ED_P0_CR,
 	    sc->cr_proto | ED_CR_PAGE_1 | ED_CR_STP);
 
 	/* Copy out our station address. */
 	for (i = 0; i < ETHER_ADDR_LEN; ++i)
-		NIC_PUT(bc, ioh, nicbase, ED_P1_PAR0 + i,
+		NIC_PUT(iot, ioh, nicbase, ED_P1_PAR0 + i,
 		    sc->sc_arpcom.ac_enaddr[i]);
 
 	/* Set multicast filter on chip. */
 	ed_getmcaf(&sc->sc_arpcom, mcaf);
 	for (i = 0; i < 8; i++)
-		NIC_PUT(bc, ioh, nicbase, ED_P1_MAR0 + i, ((u_char *)mcaf)[i]);
+		NIC_PUT(iot, ioh, nicbase, ED_P1_MAR0 + i, ((u_char *)mcaf)[i]);
 
 	/*
 	 * Set current page pointer to one page after the boundary pointer, as
 	 * recommended in the National manual.
 	 */
 	sc->next_packet = sc->rec_page_start + 1;
-	NIC_PUT(bc, ioh, nicbase, ED_P1_CURR, sc->next_packet);
+	NIC_PUT(iot, ioh, nicbase, ED_P1_CURR, sc->next_packet);
 
 	/* Program command register for page 0. */
-	NIC_PUT(bc, ioh, nicbase, ED_P1_CR,
+	NIC_PUT(iot, ioh, nicbase, ED_P1_CR,
 	    sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STP);
 
 	i = ED_RCR_AB | ED_RCR_AM;
@@ -1687,10 +1705,10 @@ edinit(sc)
 		 */
 		i |= ED_RCR_PRO | ED_RCR_AR | ED_RCR_SEP;
 	}
-	NIC_PUT(bc, ioh, nicbase, ED_P0_RCR, i);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_RCR, i);
 
 	/* Take interface out of loopback. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_TCR, 0);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_TCR, 0);
 
 	/*
 	 * If this is a 3Com board, the tranceiver must be software enabled
@@ -1700,25 +1718,25 @@ edinit(sc)
 		u_char x;
 	case ED_VENDOR_3COM:
 		if (ifp->if_flags & IFF_LINK0)
-			bus_io_write_1(bc, ioh, asicbase + ED_3COM_CR, 0);
+			bus_space_write_1(iot, ioh, asicbase + ED_3COM_CR, 0);
 		else
-			bus_io_write_1(bc, ioh, asicbase + ED_3COM_CR,
+			bus_space_write_1(iot, ioh, asicbase + ED_3COM_CR,
 			    ED_3COM_CR_XSEL);
 		break;
 	case ED_VENDOR_WD_SMC:
 		if ((sc->type & ED_WD_SOFTCONFIG) == 0)
 			break;
-		x = bus_io_read_1(bc, ioh, asicbase + ED_WD_IRR);
+		x = bus_space_read_1(iot, ioh, asicbase + ED_WD_IRR);
 		if (ifp->if_flags & IFF_LINK0)
 			x &= ~ED_WD_IRR_OUT2;
 		else
 			x |= ED_WD_IRR_OUT2;
-		bus_io_write_1(bc, ioh, asicbase + ED_WD_IRR, x);
+		bus_space_write_1(iot, ioh, asicbase + ED_WD_IRR, x);
 		break;
 	}
 
 	/* Fire up the interface. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_CR,
+	NIC_PUT(iot, ioh, nicbase, ED_P0_CR,
 	    sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA);
 
 	/* Set 'running' flag, and clear output active flag. */
@@ -1732,12 +1750,12 @@ edinit(sc)
 /*
  * This routine actually starts the transmission on the interface.
  */
-static inline void
+static __inline void
 ed_xmit(sc)
 	struct ed_softc *sc;
 {
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_io_handle_t ioh = sc->sc_ioh;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
 	struct ifnet *ifp = &sc->sc_arpcom.ac_if;
 	int nicbase = sc->nic_base;
 	u_short len;
@@ -1745,19 +1763,19 @@ ed_xmit(sc)
 	len = sc->txb_len[sc->txb_next_tx];
 
 	/* Set NIC for page 0 register access. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_CR,
+	NIC_PUT(iot, ioh, nicbase, ED_P0_CR,
 	    sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA);
 
 	/* Set TX buffer start page. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_TPSR, sc->tx_page_start +
+	NIC_PUT(iot, ioh, nicbase, ED_P0_TPSR, sc->tx_page_start +
 	    sc->txb_next_tx * ED_TXBUF_SIZE);
 
 	/* Set TX length. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_TBCR0, len);
-	NIC_PUT(bc, ioh, nicbase, ED_P0_TBCR1, len >> 8);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_TBCR0, len);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_TBCR1, len >> 8);
 
 	/* Set page 0, remote DMA complete, transmit packet, and *start*. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_CR,
+	NIC_PUT(iot, ioh, nicbase, ED_P0_CR,
 	    sc->cr_proto | ED_CR_PAGE_0 | ED_CR_TXP | ED_CR_STA);
 
 	/* Point to next transmit buffer slot and wrap if necessary. */
@@ -1783,8 +1801,8 @@ edstart(ifp)
 	struct ifnet *ifp;
 {
 	struct ed_softc *sc = ifp->if_softc;
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_io_handle_t ioh = sc->sc_ioh;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
 	struct mbuf *m0, *m;
 	int buffer;
 	int asicbase = sc->asic_base;
@@ -1829,7 +1847,7 @@ outloop:
 		 */
 		case ED_VENDOR_3COM:
 			if (sc->isa16bit)
-				bus_io_write_1(bc, ioh,
+				bus_space_write_1(iot, ioh,
 				    asicbase + ED_3COM_GACFR,
 				    ED_3COM_GACFR_RSEL);
 			break;
@@ -1839,12 +1857,12 @@ outloop:
 		 */
 		case ED_VENDOR_WD_SMC:
 			if (sc->isa16bit)
-				bus_io_write_1(bc, ioh, asicbase + ED_WD_LAAR,
+				bus_space_write_1(iot, ioh, asicbase + ED_WD_LAAR,
 				    sc->wd_laar_proto | ED_WD_LAAR_M16EN);
-			bus_io_write_1(bc, ioh, asicbase + ED_WD_MSR,
+			bus_space_write_1(iot, ioh, asicbase + ED_WD_MSR,
 			    sc->wd_msr_proto | ED_WD_MSR_MENB);
-			(void) bus_io_read_1(bc, sc->sc_delayioh, 0);
-			(void) bus_io_read_1(bc, sc->sc_delayioh, 0);
+			(void) bus_space_read_1(iot, sc->sc_delaybah, 0);
+			(void) bus_space_read_1(iot, sc->sc_delaybah, 0);
 			break;
 		}
 
@@ -1859,18 +1877,18 @@ outloop:
 		switch (sc->vendor) {
 		case ED_VENDOR_3COM:
 			if (sc->isa16bit)
-				bus_io_write_1(bc, ioh,
+				bus_space_write_1(iot, ioh,
 				    asicbase + ED_3COM_GACFR,
 				    ED_3COM_GACFR_RSEL | ED_3COM_GACFR_MBS0);
 			break;
 		case ED_VENDOR_WD_SMC:
-			bus_io_write_1(bc, ioh, asicbase + ED_WD_MSR,
+			bus_space_write_1(iot, ioh, asicbase + ED_WD_MSR,
 			    sc->wd_msr_proto);
 			if (sc->isa16bit)
-				bus_io_write_1(bc, ioh, asicbase + ED_WD_LAAR,
+				bus_space_write_1(iot, ioh, asicbase + ED_WD_LAAR,
 				    sc->wd_laar_proto);
-			(void) bus_io_read_1(bc, sc->sc_delayioh, 0);
-			(void) bus_io_read_1(bc, sc->sc_delayioh, 0);
+			(void) bus_space_read_1(iot, sc->sc_delaybah, 0);
+			(void) bus_space_read_1(iot, sc->sc_delaybah, 0);
 			break;
 		}
 	} else
@@ -1895,12 +1913,12 @@ outloop:
 /*
  * Ethernet interface receiver interrupt.
  */
-static inline void
+static __inline void
 ed_rint(sc)
 	struct ed_softc *sc;
 {
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_io_handle_t ioh = sc->sc_ioh;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
 	int nicbase = sc->nic_base;
 	u_int8_t boundary, current;
 	u_int16_t len;
@@ -1913,7 +1931,7 @@ ed_rint(sc)
 
 loop:
 	/* Set NIC to page 1 registers to get 'current' pointer. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_CR,
+	NIC_PUT(iot, ioh, nicbase, ED_P0_CR,
 	    sc->cr_proto | ED_CR_PAGE_1 | ED_CR_STA);
 
 	/*
@@ -1924,12 +1942,12 @@ loop:
 	 * until the logical beginning equals the logical end (or in other
 	 * words, until the ring-buffer is empty).
 	 */
-	current = NIC_GET(bc, ioh, nicbase, ED_P1_CURR);
+	current = NIC_GET(iot, ioh, nicbase, ED_P1_CURR);
 	if (sc->next_packet == current)
 		return;
 
 	/* Set NIC to page 0 registers to update boundary register. */
-	NIC_PUT(bc, ioh, nicbase, ED_P1_CR,
+	NIC_PUT(iot, ioh, nicbase, ED_P1_CR,
 	    sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA);
 
 	do {
@@ -2014,7 +2032,7 @@ loop:
 		boundary = sc->next_packet - 1;
 		if (boundary < sc->rec_page_start)
 			boundary = sc->rec_page_stop - 1;
-		NIC_PUT(bc, ioh, nicbase, ED_P0_BNRY, boundary);
+		NIC_PUT(iot, ioh, nicbase, ED_P0_BNRY, boundary);
 	} while (sc->next_packet != current);
 
 	goto loop;
@@ -2026,17 +2044,17 @@ edintr(arg)
 	void *arg;
 {
 	struct ed_softc *sc = arg;
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_io_handle_t ioh = sc->sc_ioh;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
 	struct ifnet *ifp = &sc->sc_arpcom.ac_if;
 	int nicbase = sc->nic_base, asicbase = sc->asic_base;
 	u_char isr;
 
 	/* Set NIC to page 0 registers. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_CR,
+	NIC_PUT(iot, ioh, nicbase, ED_P0_CR,
 	    sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA);
 
-	isr = NIC_GET(bc, ioh, nicbase, ED_P0_ISR);
+	isr = NIC_GET(iot, ioh, nicbase, ED_P0_ISR);
 	if (!isr)
 		return (0);
 
@@ -2047,14 +2065,14 @@ edintr(arg)
 		 * '1' to each bit position that was set.
 		 * (Writing a '1' *clears* the bit.)
 		 */
-		NIC_PUT(bc, ioh, nicbase, ED_P0_ISR, isr);
+		NIC_PUT(iot, ioh, nicbase, ED_P0_ISR, isr);
 
 		/*
 		 * Handle transmitter interrupts.  Handle these first because
 		 * the receiver will reset the board under some conditions.
 		 */
 		if (isr & (ED_ISR_PTX | ED_ISR_TXE)) {
-			u_char collisions = NIC_GET(bc, ioh, nicbase,
+			u_char collisions = NIC_GET(iot, ioh, nicbase,
 			    ED_P0_NCR) & 0x0f;
 
 			/*
@@ -2066,12 +2084,12 @@ edintr(arg)
 			 * course, with UDP we're screwed, but this is expected
 			 * when a network is heavily loaded.
 			 */
-			(void) NIC_GET(bc, ioh, nicbase, ED_P0_TSR);
+			(void) NIC_GET(iot, ioh, nicbase, ED_P0_TSR);
 			if (isr & ED_ISR_TXE) {
 				/*
 				 * Excessive collisions (16).
 				 */
-				if ((NIC_GET(bc, ioh, nicbase, ED_P0_TSR) &
+				if ((NIC_GET(iot, ioh, nicbase, ED_P0_TSR) &
 				    ED_TSR_ABT) && (collisions == 0)) {
 					/*
 					 * When collisions total 16, the P0_NCR
@@ -2164,34 +2182,34 @@ edintr(arg)
 				 */
 				if (sc->vendor == ED_VENDOR_WD_SMC) {
 					if (sc->isa16bit)
-						bus_io_write_1(bc, ioh,
+						bus_space_write_1(iot, ioh,
 						    asicbase + ED_WD_LAAR,
 						    sc->wd_laar_proto |
 						    ED_WD_LAAR_M16EN);
-					bus_io_write_1(bc, ioh,
+					bus_space_write_1(iot, ioh,
 					    asicbase + ED_WD_MSR,
 					    sc->wd_msr_proto | ED_WD_MSR_MENB);
-					(void) bus_io_read_1(bc,
-					    sc->sc_delayioh, 0);
-					(void) bus_io_read_1(bc,
-					    sc->sc_delayioh, 0);
+					(void) bus_space_read_1(iot,
+					    sc->sc_delaybah, 0);
+					(void) bus_space_read_1(iot,
+					    sc->sc_delaybah, 0);
 				}
 
 				ed_rint(sc);
 
 				/* Disable 16-bit access. */
 				if (sc->vendor == ED_VENDOR_WD_SMC) {
-					bus_io_write_1(bc, ioh,
+					bus_space_write_1(iot, ioh,
 					    asicbase + ED_WD_MSR,
 					    sc->wd_msr_proto);
 					if (sc->isa16bit)
-						bus_io_write_1(bc, ioh,
+						bus_space_write_1(iot, ioh,
 						    asicbase + ED_WD_LAAR,
 						    sc->wd_laar_proto);
-					(void) bus_io_read_1(bc,
-					    sc->sc_delayioh, 0);
-					(void) bus_io_read_1(bc,
-					    sc->sc_delayioh, 0);
+					(void) bus_space_read_1(iot,
+					    sc->sc_delaybah, 0);
+					(void) bus_space_read_1(iot,
+					    sc->sc_delaybah, 0);
 				}
 			}
 		}
@@ -2209,7 +2227,7 @@ edintr(arg)
 		 * set in the transmit routine, is *okay* - it is 'edge'
 		 * triggered from low to high).
 		 */
-		NIC_PUT(bc, ioh, nicbase, ED_P0_CR,
+		NIC_PUT(iot, ioh, nicbase, ED_P0_CR,
 		    sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA);
 
 		/*
@@ -2218,12 +2236,12 @@ edintr(arg)
 		 * otherwise - resulting in an infinite loop.
 		 */
 		if (isr & ED_ISR_CNT) {
-			(void) NIC_GET(bc, ioh, nicbase, ED_P0_CNTR0);
-			(void) NIC_GET(bc, ioh, nicbase, ED_P0_CNTR1);
-			(void) NIC_GET(bc, ioh, nicbase, ED_P0_CNTR2);
+			(void) NIC_GET(iot, ioh, nicbase, ED_P0_CNTR0);
+			(void) NIC_GET(iot, ioh, nicbase, ED_P0_CNTR1);
+			(void) NIC_GET(iot, ioh, nicbase, ED_P0_CNTR2);
 		}
 
-		isr = NIC_GET(bc, ioh, nicbase, ED_P0_ISR);
+		isr = NIC_GET(iot, ioh, nicbase, ED_P0_ISR);
 		if (!isr)
 			return (1);
 	}
@@ -2397,12 +2415,12 @@ ed_pio_readmem(sc, src, dst, amount)
 	caddr_t dst;
 	u_short amount;
 {
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_io_handle_t ioh = sc->sc_ioh;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
 	int nicbase = sc->nic_base;
 
 	/* Select page 0 registers. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_CR,
+	NIC_PUT(iot, ioh, nicbase, ED_P0_CR,
 	    ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
 
 	/* Round up to a word. */
@@ -2410,22 +2428,22 @@ ed_pio_readmem(sc, src, dst, amount)
 		++amount;
 
 	/* Set up DMA byte count. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_RBCR0, amount);
-	NIC_PUT(bc, ioh, nicbase, ED_P0_RBCR1, amount >> 8);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_RBCR0, amount);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_RBCR1, amount >> 8);
 
 	/* Set up source address in NIC mem. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_RSAR0, src);
-	NIC_PUT(bc, ioh, nicbase, ED_P0_RSAR1, src >> 8);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_RSAR0, src);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_RSAR1, src >> 8);
 
-	NIC_PUT(bc, ioh, nicbase, ED_P0_CR,
+	NIC_PUT(iot, ioh, nicbase, ED_P0_CR,
 	    ED_CR_RD0 | ED_CR_PAGE_0 | ED_CR_STA);
 
 	if (sc->isa16bit)
-		bus_io_read_raw_multi_2(bc, ioh,
+		bus_space_read_raw_multi_2(iot, ioh,
 		    sc->asic_base + ED_NOVELL_DATA, dst, amount);
 	else
-		bus_io_read_multi_1(bc, ioh, sc->asic_base + ED_NOVELL_DATA,
-		    dst, amount);
+		bus_space_read_multi_1(iot, ioh,
+		    sc->asic_base + ED_NOVELL_DATA, dst, amount);
 }
 
 /*
@@ -2439,36 +2457,36 @@ ed_pio_writemem(sc, src, dst, len)
 	u_short dst;
 	u_short len;
 {
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_io_handle_t ioh = sc->sc_ioh;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
 	int nicbase = sc->nic_base;
 	int maxwait = 100; /* about 120us */
 
 	/* Select page 0 registers. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_CR,
+	NIC_PUT(iot, ioh, nicbase, ED_P0_CR,
 	    ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
 
 	/* Reset remote DMA complete flag. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_ISR, ED_ISR_RDC);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_ISR, ED_ISR_RDC);
 
 	/* Set up DMA byte count. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_RBCR0, len);
-	NIC_PUT(bc, ioh, nicbase, ED_P0_RBCR1, len >> 8);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_RBCR0, len);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_RBCR1, len >> 8);
 
 	/* Set up destination address in NIC mem. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_RSAR0, dst);
-	NIC_PUT(bc, ioh, nicbase, ED_P0_RSAR1, dst >> 8);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_RSAR0, dst);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_RSAR1, dst >> 8);
 
 	/* Set remote DMA write. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_CR,
+	NIC_PUT(iot, ioh, nicbase, ED_P0_CR,
 	    ED_CR_RD1 | ED_CR_PAGE_0 | ED_CR_STA);
 
 	if (sc->isa16bit)
-		bus_io_write_raw_multi_2(bc, ioh,
+		bus_space_write_raw_multi_2(iot, ioh,
 		    sc->asic_base + ED_NOVELL_DATA, src, len);
 	else
-		bus_io_write_multi_1(bc, ioh, sc->asic_base + ED_NOVELL_DATA,
-		    src, len);
+		bus_space_write_multi_1(iot, ioh,
+		    sc->asic_base + ED_NOVELL_DATA, src, len);
 
 	/*
 	 * Wait for remote DMA complete.  This is necessary because on the
@@ -2477,7 +2495,7 @@ ed_pio_writemem(sc, src, dst, len)
 	 * waiting causes really bad things to happen - like the NIC
 	 * irrecoverably jamming the ISA bus.
 	 */
-	while (((NIC_GET(bc, ioh, nicbase, ED_P0_ISR) & ED_ISR_RDC) !=
+	while (((NIC_GET(iot, ioh, nicbase, ED_P0_ISR) & ED_ISR_RDC) !=
 	    ED_ISR_RDC) && --maxwait);
 }
 
@@ -2491,8 +2509,8 @@ ed_pio_write_mbufs(sc, m, dst)
 	struct mbuf *m;
 	u_short dst;
 {
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_io_handle_t ioh = sc->sc_ioh;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
 	int nicbase = sc->nic_base, asicbase = sc->asic_base;
 	u_short len;
 	int maxwait = 100; /* about 120us */
@@ -2500,22 +2518,22 @@ ed_pio_write_mbufs(sc, m, dst)
 	len = m->m_pkthdr.len;
 
 	/* Select page 0 registers. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_CR,
+	NIC_PUT(iot, ioh, nicbase, ED_P0_CR,
 	    ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
 
 	/* Reset remote DMA complete flag. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_ISR, ED_ISR_RDC);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_ISR, ED_ISR_RDC);
 
 	/* Set up DMA byte count. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_RBCR0, len);
-	NIC_PUT(bc, ioh, nicbase, ED_P0_RBCR1, len >> 8);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_RBCR0, len);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_RBCR1, len >> 8);
 
 	/* Set up destination address in NIC mem. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_RSAR0, dst);
-	NIC_PUT(bc, ioh, nicbase, ED_P0_RSAR1, dst >> 8);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_RSAR0, dst);
+	NIC_PUT(iot, ioh, nicbase, ED_P0_RSAR1, dst >> 8);
 
 	/* Set remote DMA write. */
-	NIC_PUT(bc, ioh, nicbase, ED_P0_CR,
+	NIC_PUT(iot, ioh, nicbase, ED_P0_CR,
 	    ED_CR_RD1 | ED_CR_PAGE_0 | ED_CR_STA);
 
 	/*
@@ -2528,7 +2546,7 @@ ed_pio_write_mbufs(sc, m, dst)
 		/* NE1000s are easy. */
 		for (; m != 0; m = m->m_next) {
 			if (m->m_len) {
-				bus_io_write_multi_1(bc, ioh,
+				bus_space_write_multi_1(iot, ioh,
 				    asicbase + ED_NOVELL_DATA,
 				    mtod(m, u_char *), m->m_len);
 			}
@@ -2547,7 +2565,7 @@ ed_pio_write_mbufs(sc, m, dst)
 			/* Finish the last word. */
 			if (wantbyte) {
 				savebyte[1] = *data;
-				bus_io_write_raw_multi_2(bc, ioh,
+				bus_space_write_raw_multi_2(iot, ioh,
 				    asicbase + ED_NOVELL_DATA, savebyte, 2);
 				data++;
 				len--;
@@ -2555,7 +2573,7 @@ ed_pio_write_mbufs(sc, m, dst)
 			}
 			/* Output contiguous words. */
 			if (len > 1) {
-				bus_io_write_raw_multi_2(bc, ioh,
+				bus_space_write_raw_multi_2(iot, ioh,
 				    asicbase + ED_NOVELL_DATA, data, len & ~1);
 			}
 			/* Save last byte, if necessary. */
@@ -2568,7 +2586,7 @@ ed_pio_write_mbufs(sc, m, dst)
 
 		if (wantbyte) {
 			savebyte[1] = 0;
-			bus_io_write_raw_multi_2(bc, ioh,
+			bus_space_write_raw_multi_2(iot, ioh,
 			    asicbase + ED_NOVELL_DATA, savebyte, 2);
 		}
 	}
@@ -2580,7 +2598,7 @@ ed_pio_write_mbufs(sc, m, dst)
 	 * waiting causes really bad things to happen - like the NIC
 	 * irrecoverably jamming the ISA bus.
 	 */
-	while (((NIC_GET(bc, ioh, nicbase, ED_P0_ISR) & ED_ISR_RDC) !=
+	while (((NIC_GET(iot, ioh, nicbase, ED_P0_ISR) & ED_ISR_RDC) !=
 	    ED_ISR_RDC) && --maxwait);
 
 	if (!maxwait) {
@@ -2597,7 +2615,7 @@ ed_pio_write_mbufs(sc, m, dst)
  * Given a source and destination address, copy 'amount' of a packet from the
  * ring buffer into a linear destination buffer.  Takes into account ring-wrap.
  */
-static inline int
+static __inline int
 ed_ring_copy(sc, src, dst, amount)
 	struct ed_softc *sc;
 	int src;
@@ -2760,8 +2778,8 @@ ed_shared_writemem(sc, from, card, len)
 	caddr_t from;
 	int card, len;
 {
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_mem_handle_t memh = sc->sc_memh;
+	bus_space_tag_t memt = sc->sc_memt;
+	bus_space_handle_t memh = sc->sc_memh;
 	u_int16_t word;
 
 	/*
@@ -2777,27 +2795,28 @@ ed_shared_writemem(sc, from, card, len)
 		 * keep accesses 16-bit wide.
 		 */
 		if (len > 0 && (card & 1)) {
-			word = bus_mem_read_2(bc, memh, card & ~1);
+			word = bus_space_read_2(memt, memh, card & ~1);
 			word = (word & 0xff) | (*from << 8);
-			bus_mem_write_2(bc, memh, card & ~1, word);
+			bus_space_write_2(memt, memh, card & ~1, word);
 			from++;
 			card++;
 			len--;
 		}
+		/* XXX I think maybe a bus_space_write_raw_region is needed. */
 		while (len > 1) {
 			word = (u_int8_t)from[0] | (u_int8_t)from[1] << 8;
-			bus_mem_write_2(bc, memh, card, word);
+			bus_space_write_2(memt, memh, card, word);
 			from += 2;
 			card += 2;
 			len -= 2;
 		}
 		if (len == 1) {
 			word = *from;
-			bus_mem_write_2(bc, memh, card, word);
+			bus_space_write_2(memt, memh, card, word);
 		}
 	} else {
 		while (len--)
-			bus_mem_write_1(bc, memh, card++, *from++);
+			bus_space_write_1(memt, memh, card++, *from++);
 	}
 }
 
@@ -2807,25 +2826,26 @@ ed_shared_readmem(sc, card, to, len)
 	caddr_t to;
 	int card, len;
 {
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_mem_handle_t memh = sc->sc_memh;
+	bus_space_tag_t memt = sc->sc_memt;
+	bus_space_handle_t memh = sc->sc_memh;
 	u_int16_t word;
 
 	/*
 	 * See comment above re. 16-bit cards.
 	 */
 	if (sc->isa16bit) {
+		/* XXX I think maybe a bus_space_read_raw_region is needed.  */
 		while (len > 1) {
-			word = bus_mem_read_2(bc, memh, card);
+			word = bus_space_read_2(memt, memh, card);
 			*to++ = word & 0xff;
 			*to++ = word >> 8 & 0xff;
 			card += 2;
 			len -= 2;
 		}
 		if (len == 1)
-			*to = bus_mem_read_2(bc, memh, card) & 0xff;
+			*to = bus_space_read_2(memt, memh, card) & 0xff;
 	} else {
 		while (len--)
-			*to++ = bus_mem_read_1(bc, memh, card++);
+			*to++ = bus_space_read_1(memt, memh, card++);
 	}
 }
diff --git a/sys/dev/isa/if_ep_isa.c b/sys/dev/isa/if_ep_isa.c
index 839166a370e..5f9d68496f2 100644
--- a/sys/dev/isa/if_ep_isa.c
+++ b/sys/dev/isa/if_ep_isa.c
@@ -67,7 +67,7 @@
 #endif
 
 #include <machine/cpu.h>
-#include <machine/bus.old.h>
+#include <machine/bus.h>
 #include <machine/intr.h>
 
 #include <dev/ic/elink3var.h>
@@ -137,8 +137,8 @@ ep_isa_probe(parent, match, aux)
 	void *match, *aux;
 {
 	struct isa_attach_args *ia = aux;
-	bus_chipset_tag_t bc = ia->ia_bc;
-	bus_io_handle_t ioh;
+	bus_space_tag_t iot = ia->ia_iot;
+	bus_space_handle_t ioh;
 	int slot, iobase, irq, i;
 	u_int16_t vendor, model;
 	struct ep_isa_done_probe *er;
@@ -171,24 +171,24 @@ ep_isa_probe(parent, match, aux)
 	/*
 	 * Map the Etherlink ID port for the probe sequence.
 	 */
-	if (bus_io_map(bc, ELINK_ID_PORT, 1, &ioh)) {
+	if (bus_space_map(iot, ELINK_ID_PORT, 1, 0, &ioh)) {
 		printf("ep_isa_probe: can't map Etherlink ID port\n");
 		return 0;
 	}
 
 	for (slot = 0; slot < MAXEPCARDS; slot++) {
-		elink_reset(bc, ioh, parent->dv_unit);
-		elink_idseq(bc, ioh, ELINK_509_POLY);
+		elink_reset(iot, ioh, parent->dv_unit);
+		elink_idseq(iot, ioh, ELINK_509_POLY);
 
 		/* Untag all the adapters so they will talk to us. */
 		if (slot == 0)
-			bus_io_write_1(bc, ioh, 0, TAG_ADAPTER + 0);
+			bus_space_write_1(iot, ioh, 0, TAG_ADAPTER + 0);
 
-		vendor = htons(epreadeeprom(bc, ioh, EEPROM_MFG_ID));
+		vendor = htons(epreadeeprom(iot, ioh, EEPROM_MFG_ID));
 		if (vendor != MFG_ID)
 			continue;
 
-		model = htons(epreadeeprom(bc, ioh, EEPROM_PROD_ID));
+		model = htons(epreadeeprom(iot, ioh, EEPROM_PROD_ID));
 		if ((model & 0xfff0) != PROD_ID) {
 #ifndef trusted
 			printf(
@@ -197,15 +197,15 @@ ep_isa_probe(parent, match, aux)
 			continue;
 			}
 
-		iobase = epreadeeprom(bc, ioh, EEPROM_ADDR_CFG);
+		iobase = epreadeeprom(iot, ioh, EEPROM_ADDR_CFG);
 		iobase = (iobase & 0x1f) * 0x10 + 0x200;
 
-		irq = epreadeeprom(bc, ioh, EEPROM_RESOURCE_CFG);
+		irq = epreadeeprom(iot, ioh, EEPROM_RESOURCE_CFG);
 		irq >>= 12;
 		epaddcard(bus, iobase, irq);
 
 		/* so card will not respond to contention again */
-		bus_io_write_1(bc, ioh, 0, TAG_ADAPTER + 1);
+		bus_space_write_1(iot, ioh, 0, TAG_ADAPTER + 1);
 
 		/*
 		 * XXX: this should probably not be done here
@@ -213,11 +213,11 @@ ep_isa_probe(parent, match, aux)
 		 * the board. Perhaps it should be done after
 		 * we have checked for irq/drq collisions?
 		 */
-		bus_io_write_1(bc, ioh, 0, ACTIVATE_ADAPTER_TO_CONFIG);
+		bus_space_write_1(iot, ioh, 0, ACTIVATE_ADAPTER_TO_CONFIG);
 	}
 	/* XXX should we sort by ethernet address? */
 
-	bus_io_unmap(bc, ioh, 1);
+	bus_space_unmap(iot, ioh, 1);
 
  bus_probed:
 
@@ -252,20 +252,20 @@ ep_isa_attach(parent, self, aux)
 {
 	struct ep_softc *sc = (void *)self;
 	struct isa_attach_args *ia = aux;
-	bus_chipset_tag_t bc = ia->ia_bc;
-	bus_io_handle_t ioh;
+	bus_space_tag_t iot = ia->ia_iot;
+	bus_space_handle_t ioh;
 	u_short conn = 0;
 
 	/* Map i/o space. */
-	if (bus_io_map(bc, ia->ia_iobase, ia->ia_iosize, &ioh))
+	if (bus_space_map(iot, ia->ia_iobase, ia->ia_iosize, 0, &ioh))
 		panic("ep_isa_attach: can't map i/o space");
 
-	sc->sc_bc = bc;
+	sc->sc_iot = iot;
 	sc->sc_ioh = ioh;
 	sc->bustype = EP_BUS_ISA;
 
 	GO_WINDOW(0);
-	conn = bus_io_read_2(bc, ioh, EP_W0_CONFIG_CTRL);
+	conn = bus_space_read_2(iot, ioh, EP_W0_CONFIG_CTRL);
 
 	printf(": <3Com 3C509 Ethernet> ");
 
diff --git a/sys/dev/isa/if_ie.c b/sys/dev/isa/if_ie.c
index bb965d84db9..e04ee3c31f3 100644
--- a/sys/dev/isa/if_ie.c
+++ b/sys/dev/isa/if_ie.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: if_ie.c,v 1.15 1996/11/12 20:30:37 niklas Exp $	*/
+/*	$OpenBSD: if_ie.c,v 1.16 1996/11/29 22:55:00 niklas Exp $	*/
 /*	$NetBSD: if_ie.c,v 1.51 1996/05/12 23:52:48 mycroft Exp $	*/
 
 /*-
@@ -142,7 +142,7 @@ iomem, and to make 16-pointers, we subtract sc_maddr and and with 0xffff.
 
 #include <machine/cpu.h>
 #include <machine/pio.h>		/* XXX convert this driver! */
-#include <machine/bus.old.h>
+#include <machine/bus.h>
 #include <machine/intr.h>
 
 #include <dev/isa/isareg.h>
@@ -464,8 +464,8 @@ el_probe(sc, ia)
 	struct ie_softc *sc;
 	struct isa_attach_args *ia;
 {
-	bus_chipset_tag_t bc = ia->ia_bc;
-	bus_io_handle_t ioh;
+	bus_space_tag_t iot = ia->ia_iot;
+	bus_space_handle_t ioh;
 	u_char c;
 	int i, rval = 0;
 	u_char signature[] = "*3COM*";
@@ -479,7 +479,7 @@ el_probe(sc, ia)
 	/*
 	 * Map the Etherlink ID port for the probe sequence.
 	 */
-	if (bus_io_map(bc, ELINK_ID_PORT, 1, &ioh)) {
+	if (bus_space_map(iot, ELINK_ID_PORT, 1, 0, &ioh)) {
 		printf("3c507 probe: can't map Etherlink ID port\n");
 		return 0;
 	}
@@ -488,9 +488,9 @@ el_probe(sc, ia)
 	 * Reset and put card in CONFIG state without changing address.
 	 * XXX Indirect brokenness here!
 	 */
-	elink_reset(bc, ioh, sc->sc_dev.dv_parent->dv_unit);
-	elink_idseq(bc, ioh, ELINK_507_POLY);
-	elink_idseq(bc, ioh, ELINK_507_POLY);
+	elink_reset(iot, ioh, sc->sc_dev.dv_parent->dv_unit);
+	elink_idseq(iot, ioh, ELINK_507_POLY);
+	elink_idseq(iot, ioh, ELINK_507_POLY);
 	outb(ELINK_ID_PORT, 0xff);
 
 	/* Check for 3COM signature before proceeding. */
@@ -508,7 +508,7 @@ el_probe(sc, ia)
 
 	/* Go to RUN state. */
 	outb(ELINK_ID_PORT, 0x00);
-	elink_idseq(bc, ioh, ELINK_507_POLY);
+	elink_idseq(iot, ioh, ELINK_507_POLY);
 	outb(ELINK_ID_PORT, 0x00);
 
 	/* Set bank 2 for version info and read BCD version byte. */
@@ -572,7 +572,7 @@ el_probe(sc, ia)
 	rval = 1;
 
  out:
-	bus_io_unmap(bc, ioh, 1);
+	bus_space_unmap(iot, ioh, 1);
 	return rval;
 }
 
diff --git a/sys/dev/isa/if_levar.h b/sys/dev/isa/if_levar.h
index 57c8c3f4ffa..17bee1b131f 100644
--- a/sys/dev/isa/if_levar.h
+++ b/sys/dev/isa/if_levar.h
@@ -47,7 +47,7 @@ struct le_softc {
 	struct	am7990_softc sc_am7990;	/* glue to MI code */
 
 	void	*sc_ih;
-	bus_io_handle_t sc_ioh;
+	bus_space_handle_t sc_ioh;
 	int	sc_card;
 	int	sc_rap, sc_rdp;		/* offsets to LANCE registers */
 };
diff --git a/sys/dev/isa/isa.c b/sys/dev/isa/isa.c
index 9401e9f064d..f30489260e6 100644
--- a/sys/dev/isa/isa.c
+++ b/sys/dev/isa/isa.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: isa.c,v 1.19 1996/11/23 21:46:41 kstailey Exp $	*/
+/*	$OpenBSD: isa.c,v 1.20 1996/11/29 22:55:01 niklas Exp $	*/
 /*	$NetBSD: isa.c,v 1.85 1996/05/14 00:31:04 thorpej Exp $	*/
 
 /*-
@@ -86,14 +86,15 @@ isaattach(parent, self, aux)
 	isa_attach_hook(parent, self, iba);
 	printf("\n");
 
-	sc->sc_bc = iba->iba_bc;
+	sc->sc_iot = iba->iba_iot;
+	sc->sc_memt = iba->iba_memt;
 	sc->sc_ic = iba->iba_ic;
 
 	/*
 	 * Map port 0x84, which causes a 1.25us delay when read.
 	 * We do this now, since several drivers need it.
 	 */
-	if (bus_io_map(sc->sc_bc, 0x84, 1, &sc->sc_delayioh))
+	if (bus_space_map(sc->sc_iot, 0x84, 1, 0, &sc->sc_delaybah))
 		panic("isaattach: can't map `delay port'");	/* XXX */
 
 	TAILQ_INIT(&sc->sc_subdevs);
@@ -145,7 +146,8 @@ isascan(parent, match)
 	irq_map = find_emap("irq");
 	drq_map = find_emap("drq");
 
-	ia.ia_bc = sc->sc_bc;
+	ia.ia_iot = sc->sc_iot;
+	ia.ia_memt = sc->sc_memt;
 	ia.ia_ic = sc->sc_ic;
 	ia.ia_iobase = cf->cf_loc[0];
 	ia.ia_iosize = 0x666;
@@ -153,7 +155,7 @@ isascan(parent, match)
 	ia.ia_msize = cf->cf_loc[3];
 	ia.ia_irq = cf->cf_loc[4] == 2 ? 9 : cf->cf_loc[4];
 	ia.ia_drq = cf->cf_loc[5];
-	ia.ia_delayioh = sc->sc_delayioh;
+	ia.ia_delaybah = sc->sc_delaybah;
 
 	if (cf->cf_fstate == FSTATE_STAR) {
 		struct isa_attach_args ia2 = ia;
diff --git a/sys/dev/isa/isadma.c b/sys/dev/isa/isadma.c
index 9eb0b6f030c..a16240d126c 100644
--- a/sys/dev/isa/isadma.c
+++ b/sys/dev/isa/isadma.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: isadma.c,v 1.9 1996/11/23 21:46:41 kstailey Exp $	*/
+/*	$OpenBSD: isadma.c,v 1.10 1996/11/29 22:55:01 niklas Exp $	*/
 /*	$NetBSD: isadma.c,v 1.19 1996/04/29 20:03:26 christos Exp $	*/
 
 #include <sys/param.h>
@@ -12,6 +12,7 @@
 
 #include <vm/vm.h>
 
+#include <machine/bus.h>
 #include <machine/pio.h>
 
 #include <dev/isa/isareg.h>
@@ -27,13 +28,14 @@ struct dma_info {
 	struct isadma_seg phys[1];
 };
 
+static struct isadma_softc *isadma_sc;	/*XXX ugly */
 static struct dma_info dma_info[8];
 static u_int8_t dma_finished;
 
 /* high byte of address is stored in this port for i-th dma channel */
 static int dmapageport[2][4] = {
-	{0x87, 0x83, 0x81, 0x82},
-	{0x8f, 0x8b, 0x89, 0x8a}
+	{0x7, 0x3, 0x1, 0x2},
+	{0xf, 0xb, 0x9, 0xa}
 };
 
 static u_int8_t dmamode[4] = {
@@ -47,6 +49,14 @@ int isadmamatch __P((struct device *, void *, void *));
 void isadmaattach __P((struct device *, struct device *, void *));
 int isadmaprint __P((void *, const char *));
 
+struct isadma_softc {
+	struct device sc_dev;
+	bus_space_tag_t sc_iot;
+	bus_space_handle_t sc_ioh1;
+	bus_space_handle_t sc_ioh2;
+	bus_space_handle_t sc_iohpg;
+};
+
 struct cfattach isadma_ca = {
 	sizeof(struct device), isadmamatch, isadmaattach
 };
@@ -72,7 +82,23 @@ isadmaattach(parent, self, aux)
 	struct device *parent, *self;
 	void *aux;
 {
+	struct isadma_softc *sc = (void *)self;
+	struct isa_attach_args *ia = aux;
+	bus_space_tag_t iot;
+	bus_space_handle_t ioh;
+
 	printf("\n");
+	iot = sc->sc_iot = ia->ia_iot;
+	if (bus_space_map(iot, IO_DMA1, DMA_NREGS(1), 0, &ioh))
+	    	panic("isadmaattach: couldn't map I/O ports at IO_DMA1");
+	sc->sc_ioh1 = ioh;
+	if (bus_space_map(iot, IO_DMA2, DMA_NREGS(2), 0, &ioh))
+		panic("isadmaattach: couldn't map I/O ports at IO_DMA2");
+	sc->sc_ioh2 = ioh;
+	if (bus_space_map(iot, IO_DMAPG, 16 /* XXX */, 0, &ioh))
+		panic("isadmaattach: couldn't map I/O ports at IO_DMAPG");
+	sc->sc_iohpg = ioh;
+	isadma_sc = sc;
 }
 
 /*
@@ -83,6 +109,10 @@ void
 isadma_cascade(chan)
 	int chan;
 {
+	struct isadma_softc *sc = isadma_sc;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh;
+	int dma_unit;
 
 #ifdef ISADMA_DEBUG
 	if (chan < 0 || chan > 7)
@@ -91,14 +121,16 @@ isadma_cascade(chan)
 
 	/* set dma channel mode, and set dma channel mode */
 	if ((chan & 4) == 0) {
-		outb(DMA1_MODE, chan | DMA37MD_CASCADE);
-		outb(DMA1_SMSK, chan);
+		ioh = sc->sc_ioh1;
+		dma_unit = 1;
 	} else {
+		ioh = sc->sc_ioh2;
 		chan &= 3;
-
-		outb(DMA2_MODE, chan | DMA37MD_CASCADE);
-		outb(DMA2_SMSK, chan);
+		dma_unit = 2;
 	}
+	bus_space_write_1(iot, ioh, DMA_MODE(dma_unit),
+	    chan | DMA37MD_CASCADE);
+	bus_space_write_1(iot, ioh, DMA_SMSK(dma_unit), chan);
 }
 
 /*
@@ -112,9 +144,13 @@ isadma_start(addr, nbytes, chan, flags)
 	int chan;
 	int flags;
 {
+	struct isadma_softc *sc = isadma_sc;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh;
 	struct dma_info *di;
 	int waport;
 	int mflags;
+	int dma_unit;
 
 #ifdef ISADMA_DEBUG
 	if (chan < 0 || chan > 7 ||
@@ -153,52 +189,46 @@ isadma_start(addr, nbytes, chan, flags)
 		 * Program one of DMA channels 0..3.  These are
 		 * byte mode channels.
 		 */
-		/* set dma channel mode, and reset address ff */
-		outb(DMA1_MODE, chan | dmamode[flags]);
-		outb(DMA1_FFC, 0);
-
-		/* send start address */
-		waport = DMA1_CHN(chan);
-		outb(dmapageport[0][chan], di->phys[0].addr>>16);
-		outb(waport, di->phys[0].addr);
-		outb(waport, di->phys[0].addr>>8);
-
-		/* send count */
-		outb(waport + 1, --nbytes);
-		outb(waport + 1, nbytes>>8);
-
-		/* unmask channel */
-		outb(DMA1_SMSK, chan | DMA37SM_CLEAR);
+		ioh = sc->sc_ioh1;
+		dma_unit = 1;
 	} else {
 		/*
 		 * Program one of DMA channels 4..7.  These are
 		 * word mode channels.
 		 */
-		/* set dma channel mode, and reset address ff */
-		outb(DMA2_MODE, (chan & 3) | dmamode[flags]);
-		outb(DMA2_FFC, 0);
-
-		/* send start address */
-		waport = DMA2_CHN(chan & 3);
-		outb(dmapageport[1][chan], di->phys[0].addr>>16);
-		outb(waport, di->phys[0].addr>>1);
-		outb(waport, di->phys[0].addr>>9);
-
-		/* send count */
+		ioh = sc->sc_ioh2;
+		dma_unit = 2;
+		chan &= 3;
 		nbytes >>= 1;
-		outb(waport + 2, --nbytes);
-		outb(waport + 2, nbytes>>8);
-
-		/* unmask channel */
-		outb(DMA2_SMSK, (chan & 3) | DMA37SM_CLEAR);
 	}
+       	/* set dma channel mode, and reset address ff */
+	bus_space_write_1(iot, ioh, DMA_MODE(dma_unit), chan | dmamode[flags]);
+	bus_space_write_1(iot, ioh, DMA_FFC(dma_unit), 0);
+
+	/* send start address */
+	waport = DMA_CHN(dma_unit, chan);
+	bus_space_write_1(iot, sc->sc_iohpg,
+	    dmapageport[dma_unit - 1][chan], di->phys[0].addr>>16);
+	bus_space_write_1(iot, ioh, waport, di->phys[0].addr);
+	bus_space_write_1(iot, ioh, waport, di->phys[0].addr>>8);
+
+	/* send count */
+	bus_space_write_1(iot, ioh, waport + dma_unit, --nbytes & 0xff);
+	bus_space_write_1(iot, ioh, waport + dma_unit, nbytes >> 8);
+
+	/* unmask channel */
+	bus_space_write_1(iot, ioh, DMA_SMSK(dma_unit), chan | DMA37SM_CLEAR);
 }
 
 void
 isadma_abort(chan)
 	int chan;
 {
+	struct isadma_softc *sc = isadma_sc;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh;
 	struct dma_info *di;
+	int dma_unit;
 
 #ifdef ISADMA_DEBUG
 	if (chan < 0 || chan > 7)
@@ -212,11 +242,15 @@ isadma_abort(chan)
 	}
 
 	/* mask channel */
-	if ((chan & 4) == 0)
-		outb(DMA1_SMSK, DMA37SM_SET | chan);
-	else
-		outb(DMA2_SMSK, DMA37SM_SET | (chan & 3));
-
+	if ((chan & 4) == 0) {
+		ioh = sc->sc_ioh1;
+		dma_unit = 1;
+	} else {
+		ioh = sc->sc_ioh2;
+		chan &= 3;
+		dma_unit = 2;
+	}
+	bus_space_write_1(iot, ioh, DMA_SMSK(dma_unit), DMA37SM_SET | chan);
 	isadma_unmap(di->addr, di->nbytes, 1, di->phys);
 	di->active = 0;
 }
@@ -225,6 +259,10 @@ int
 isadma_finished(chan)
 	int chan;
 {
+	struct isadma_softc *sc = isadma_sc;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh;
+	int dma_unit;
 
 #ifdef ISADMA_DEBUG
 	if (chan < 0 || chan > 7)
@@ -232,11 +270,15 @@ isadma_finished(chan)
 #endif
 
 	/* check that the terminal count was reached */
-	if ((chan & 4) == 0)
-		dma_finished |= inb(DMA1_SR) & 0x0f;
-	else
-		dma_finished |= (inb(DMA2_SR) & 0x0f) << 4;
-
+	if ((chan & 4) == 0) {
+		ioh = sc->sc_ioh1;
+		dma_unit = 1;
+	} else {
+		ioh = sc->sc_ioh2;
+		chan &= 3;
+		dma_unit = 2;
+	}
+	dma_finished |= bus_space_read_1(iot, ioh, DMA_SR(dma_unit)) & 0x0f;
 	return ((dma_finished & (1 << chan)) != 0);
 }
 
@@ -244,6 +286,10 @@ void
 isadma_done(chan)
 	int chan;
 {
+	struct isadma_softc *sc = isadma_sc;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh;
+	int dma_unit;
 	struct dma_info *di;
 	u_char tc;
 
@@ -259,19 +305,23 @@ isadma_done(chan)
 	}
 
 	/* check that the terminal count was reached */
-	if ((chan & 4) == 0)
-		tc = inb(DMA1_SR) & (1 << chan);
-	else
-		tc = inb(DMA2_SR) & (1 << (chan & 3));
+	if ((chan & 4) == 0) {
+		ioh = sc->sc_ioh1;
+		dma_unit = 1;
+	} else {
+		ioh = sc->sc_ioh2;
+		chan &= 3;
+		dma_unit = 2;
+	}
+	tc = bus_space_read_1(iot, ioh, DMA_SR(dma_unit)) & (1 << chan);
+
 	if (tc == 0)
 		/* XXX probably should panic or something */
-		log(LOG_ERR, "dma channel %d not finished\n", chan);
+		log(LOG_ERR, "dma channel %d not finished\n",
+		    dma_unit == 1 ? chan : (chan | 4));
 
 	/* mask channel */
-	if ((chan & 4) == 0)
-		outb(DMA1_SMSK, DMA37SM_SET | chan);
-	else
-		outb(DMA2_SMSK, DMA37SM_SET | (chan & 3));
+	bus_space_write_1(iot, ioh, DMA_SMSK(dma_unit), DMA37SM_SET | chan);
 
 	/* XXX Will this do what we want with DMAMODE_LOOP?  */
 	if (di->flags & DMAMODE_READ)
diff --git a/sys/dev/isa/isadmareg.h b/sys/dev/isa/isadmareg.h
index 47744042425..a534b64671d 100644
--- a/sys/dev/isa/isadmareg.h
+++ b/sys/dev/isa/isadmareg.h
@@ -1,21 +1,15 @@
+/*	$OpenBSD: isadmareg.h,v 1.2 1996/11/29 22:55:02 niklas Exp $	*/
 /*	$NetBSD: isadmareg.h,v 1.4 1995/06/28 04:31:48 cgd Exp $	*/
 
 #include <dev/ic/i8237reg.h>
 
 /*
- * Register definitions for DMA controller 1 (channels 0..3):
+ * Register definitions for the DMA controllers
  */
-#define	DMA1_CHN(c)	(IO_DMA1 + 1*(2*(c)))	/* addr reg for channel c */
-#define	DMA1_SR		(IO_DMA1 + 1*8)		/* status register */
-#define	DMA1_SMSK	(IO_DMA1 + 1*10)	/* single mask register */
-#define	DMA1_MODE	(IO_DMA1 + 1*11)	/* mode register */
-#define	DMA1_FFC	(IO_DMA1 + 1*12)	/* clear first/last FF */
+#define	DMA_CHN(u, c)	((u) * (2 * (c)))	/* addr reg for channel c */
+#define	DMA_SR(u)	((u) * 8)		/* status register */
+#define	DMA_SMSK(u)	((u) * 10)		/* single mask register */
+#define	DMA_MODE(u)	((u) * 11)		/* mode register */
+#define	DMA_FFC(u)	((u) * 12)		/* clear first/last FF */
 
-/*
- * Register definitions for DMA controller 2 (channels 4..7):
- */
-#define	DMA2_CHN(c)	(IO_DMA2 + 2*(2*(c)))	/* addr reg for channel c */
-#define	DMA2_SR		(IO_DMA2 + 2*8)		/* status register */
-#define	DMA2_SMSK	(IO_DMA2 + 2*10)	/* single mask register */
-#define	DMA2_MODE	(IO_DMA2 + 2*11)	/* mode register */
-#define	DMA2_FFC	(IO_DMA2 + 2*12)	/* clear first/last FF */
+#define DMA_NREGS(u)	((u) * 13)		/* XXX true? */	
diff --git a/sys/dev/isa/isadmavar.h b/sys/dev/isa/isadmavar.h
index 3e00c8e7cb6..20334013d6e 100644
--- a/sys/dev/isa/isadmavar.h
+++ b/sys/dev/isa/isadmavar.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: isadmavar.h,v 1.4 1996/04/22 20:03:05 hannken Exp $	*/
+/*	$OpenBSD: isadmavar.h,v 1.5 1996/11/29 22:55:02 niklas Exp $	*/
 /*	$NetBSD: isadmavar.h,v 1.4 1996/03/01 04:08:46 mycroft Exp $	*/
 
 #define	DMAMODE_WRITE	0
diff --git a/sys/dev/isa/isapnp.c b/sys/dev/isa/isapnp.c
index e7d43f8aa72..7b845341f32 100644
--- a/sys/dev/isa/isapnp.c
+++ b/sys/dev/isa/isapnp.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: isapnp.c,v 1.8 1996/11/23 21:46:42 kstailey Exp $	*/
+/*	$OpenBSD: isapnp.c,v 1.9 1996/11/29 22:55:03 niklas Exp $	*/
 
 /*
  * Copyright (c) 1996, Shawn Hsiao <shawn@alpha.secc.fju.edu.tw>
@@ -62,15 +62,15 @@
 #include <sys/malloc.h>
 #include <sys/queue.h>
 #include <sys/extent.h>
-#include <machine/bus.old.h>
+#include <machine/bus.h>
 
 #include <dev/isa/isavar.h>
 
 #include "isapnpreg.h"
 #include "isapnpvar.h"
 
-#define SEND(d, r)	{ bus_io_write_1(sc->bc, sc->addrh, 0, d); \
-                          bus_io_write_1(sc->bc, sc->wdh,   0, r); }
+#define SEND(d, r)	{ bus_space_write_1(sc->iot, sc->addrh, 0, d); \
+                          bus_space_write_1(sc->iot, sc->wdh,   0, r); }
 
 int isapnpmatch __P((struct device *, void *, void *));
 void isapnpattach __P((struct device *, struct device *, void *));
@@ -81,10 +81,10 @@ struct isapnp_softc {
 	struct device sc_dev;
 	struct device *parent;
 
-	bus_chipset_tag_t bc;
-	bus_io_handle_t addrh;
-	bus_io_handle_t wdh;
-	bus_io_handle_t rdh;
+	bus_space_tag_t iot;
+	bus_space_handle_t addrh;
+	bus_space_handle_t wdh;
+	bus_space_handle_t rdh;
 	int rd_offset;
 
 	int rd_port;
@@ -154,7 +154,7 @@ isapnpattach(parent, self, aux)
 	 */
 	isc->pnpsc = sc;
 
-	sc->bc = ia->ia_bc;
+	sc->iot = ia->ia_iot;
 	sc->parent = parent;
 	TAILQ_INIT(&sc->q_card);
 
@@ -163,9 +163,9 @@ isapnpattach(parent, self, aux)
 	 * from ADDRESS port,
 	 * and valid READ_DATA ports are from 0x203 to 0x3ff.
 	 */
-	if (bus_io_map(sc->bc, ADDRESS, 1, &(sc->addrh)) ||
-	    bus_io_map(sc->bc, ADDRESS+0x0800, 1, &(sc->wdh))   ||
-	    bus_io_map(sc->bc, 0x0200, 0x200, &(sc->rdh)))
+	if (bus_space_map(sc->iot, ADDRESS, 1, 0, &(sc->addrh)) ||
+	    bus_space_map(sc->iot, ADDRESS+0x0800, 1, 0, &(sc->wdh)) ||
+	    bus_space_map(sc->iot, 0x0200, 0x200, 0, &(sc->rdh)))
 		panic("isapnpattach: io mapping failed");
 
 	/* Try various READ_DATA ports from 0x203-0x3ff */
@@ -200,7 +200,7 @@ postisapnpattach(parent, self, aux)
 			struct isa_attach_args ia;
 
 			bzero(&ia, sizeof(ia));
-			ia.ia_bc = iba->iba_bc;
+			ia.ia_iot = iba->iba_iot;
 			ia.ia_ic = iba->iba_ic;
 			ia.id = dev->id;
 			ia.comp_id = dev->comp_id;
@@ -492,20 +492,20 @@ static void
 send_Initiation_LFSR(sc)
 	struct isapnp_softc *sc;
 {
-	bus_chipset_tag_t bc = sc->bc;
-	bus_io_handle_t addrh = sc->addrh;
+	bus_space_tag_t iot = sc->iot;
+	bus_space_handle_t addrh = sc->addrh;
 	int cur, i;
 
 	/* Reset the LSFR */
-	bus_io_write_1(bc, addrh, 0, 0);
-	bus_io_write_1(bc, addrh, 0, 0);
+	bus_space_write_1(iot, addrh, 0, 0);
+	bus_space_write_1(iot, addrh, 0, 0);
 
 	cur = 0x6a;
-	bus_io_write_1(bc, addrh, 0, cur);
+	bus_space_write_1(iot, addrh, 0, cur);
 
 	for (i = 1; i < 32; i++) {
 		cur = (cur >> 1) | (((cur ^ (cur >> 1)) << 7) & 0xff);
-		bus_io_write_1(bc, addrh, 0, cur);
+		bus_space_write_1(iot, addrh, 0, cur);
 	}
 }
 
@@ -517,8 +517,8 @@ get_serial(sc, data)
 	struct isapnp_softc *sc;
 	unsigned char *data;
 {
-	bus_chipset_tag_t bc = sc->bc;
-	bus_io_handle_t rdh = sc->rdh;
+	bus_space_tag_t iot = sc->iot;
+	bus_space_handle_t rdh = sc->rdh;
 
 	int i, bit, valid = 0, sum = 0x6a;
 
@@ -527,11 +527,12 @@ get_serial(sc, data)
 	sc->rd_offset = ((sc->rd_port - 0x80) << 2) | 0x3;
 
 	for (i = 0; i < 72; i++) {
-		bit = bus_io_read_1(bc, rdh, sc->rd_offset) == 0x55;
+		bit = bus_space_read_1(iot, rdh, sc->rd_offset) == 0x55;
 		delay(250);	/* Delay 250 usec */
 
 		/* Can't Short Circuit the next evaluation, so 'and' is last */
-		bit = (bus_io_read_1(bc, rdh, sc->rd_offset) == 0xaa) && bit;
+		bit = (bus_space_read_1(iot, rdh, sc->rd_offset) == 0xaa) &&
+		    bit;
 		delay(250);	/* Delay 250 usec */
 
 		valid = valid || bit;
@@ -557,9 +558,9 @@ get_resource_info(sc, buffer, len)
 	int i, j;
 
 	for (i = 0; i < len; i++) {
-		bus_io_write_1(sc->bc, sc->addrh, 0, STATUS);
+		bus_space_write_1(sc->iot, sc->addrh, 0, STATUS);
 		for (j = 0; j < 100; j++) {
-			if ((bus_io_read_1(sc->bc, sc->rdh, sc->rd_offset))
+			if ((bus_space_read_1(sc->iot, sc->rdh, sc->rd_offset))
 			    & 0x1)
 				break;
 			delay(1);
@@ -569,8 +570,8 @@ get_resource_info(sc, buffer, len)
 			       sc->sc_dev.dv_xname);
 			return 0;
 		}
-		bus_io_write_1(sc->bc, sc->addrh, 0, RESOURCE_DATA);
-		buffer[i] = bus_io_read_1(sc->bc, sc->rdh, sc->rd_offset);
+		bus_space_write_1(sc->iot, sc->addrh, 0, RESOURCE_DATA);
+		buffer[i] = bus_space_read_1(sc->iot, sc->rdh, sc->rd_offset);
 	}
 	return 1;
 }
@@ -843,7 +844,7 @@ isolation_protocol(sc)
 		/* Wake up cards without a CSN */
 		SEND(WAKE, 0);
 		SEND(SET_RD_DATA, sc->rd_port);
-		bus_io_write_1(sc->bc, sc->addrh, 0, SERIAL_ISOLATION);
+		bus_space_write_1(sc->iot, sc->addrh, 0, SERIAL_ISOLATION);
 		delay(1000);	/* Delay 1 msec */
 
 		if (get_serial(sc, data)) {
@@ -1003,7 +1004,7 @@ find_free_io(sc, desc, min_addr, max_addr, size, alignment, range_check)
 	int desc, min_addr, max_addr, size, alignment, range_check;
 {
 	int addr, i, success = 0;
-	bus_io_handle_t data;
+	bus_space_handle_t data;
 	struct emap *io_map;
 
 	if (range_check) {
@@ -1012,17 +1013,18 @@ find_free_io(sc, desc, min_addr, max_addr, size, alignment, range_check)
 			SEND(IO_CONFIG_BASE + desc * 2, addr >> 8);
 			SEND(IO_CONFIG_BASE + desc * 2 + 1, addr & 0xff);
 			SEND(IO_RANGE_CHECK, 0x2);
-			bus_io_map(sc->bc, addr, size, &data);
+			bus_space_map(sc->iot, addr, size, 0, &data);
 			i = 0;
 			for (i = 0; i < size; i++) {
-				if (bus_io_read_1(sc->bc, data, i) != 0xAA) {
-					bus_io_unmap(sc->bc, data, size);
+				if (bus_space_read_1(sc->iot, data, i) !=
+				    0xAA) {
+					bus_space_unmap(sc->iot, data, size);
 					break;
 				}
 			}
 			if (i == size) {
 				success = 1;
-				bus_io_unmap(sc->bc, data, size);
+				bus_space_unmap(sc->iot, data, size);
 				break;
 			}
 		}
diff --git a/sys/dev/isa/isavar.h b/sys/dev/isa/isavar.h
index 1a79d7e9f84..2701736b4c9 100644
--- a/sys/dev/isa/isavar.h
+++ b/sys/dev/isa/isavar.h
@@ -1,5 +1,5 @@
-/*	$OpenBSD: isavar.h,v 1.19 1996/11/23 21:46:43 kstailey Exp $	*/
-/*	$NetBSD: isavar.h,v 1.23 1996/05/08 23:32:31 thorpej Exp $	*/
+/*	$OpenBSD: isavar.h,v 1.20 1996/11/29 22:55:04 niklas Exp $	*/
+/*	$NetBSD: isavar.h,v 1.24 1996/10/21 22:41:11 thorpej Exp $	*/
 
 /*
  * Copyright (c) 1995 Chris G. Demetriou
@@ -45,7 +45,7 @@
  */
 
 #include <sys/queue.h>
-#include <machine/bus.old.h>
+#include <machine/bus.h>
 
 /* 
  * Structures and definitions needed by the machine-dependent header.
@@ -75,8 +75,9 @@ ERROR: COMPILING FOR UNSUPPORTED MACHINE, OR MORE THAN ONE.
  * ISA bus attach arguments
  */
 struct isabus_attach_args {
-	char	*iba_busname;			/* XXX should be common */
-	bus_chipset_tag_t iba_bc;		/* XXX should be common */
+	char	*iba_busname;		/* XXX should be common */
+	bus_space_tag_t iba_iot;	/* isa i/o space tag */
+	bus_space_tag_t iba_memt;	/* isa mem space tag */
 	isa_chipset_tag_t iba_ic;
 };
 
@@ -84,7 +85,9 @@ struct isabus_attach_args {
  * ISA driver attach arguments
  */
 struct isa_attach_args {
-	bus_chipset_tag_t ia_bc;
+	bus_space_tag_t ia_iot;		/* isa i/o space tag */
+	bus_space_tag_t ia_memt;	/* isa mem space tag */
+
 	isa_chipset_tag_t ia_ic;
 
 	int	ia_iobase;		/* base i/o address */
@@ -95,7 +98,7 @@ struct isa_attach_args {
 	u_int	ia_msize;		/* size of i/o memory */
 	void	*ia_aux;		/* driver specific */
 
-	bus_io_handle_t ia_delayioh;	/* i/o handle for `delay port' */
+	bus_space_handle_t ia_delaybah;	/* i/o handle for `delay port' */
 
 	/* XXX need fixes, some are duplicated */
 	/* begin isapnp section */
@@ -139,16 +142,18 @@ struct isa_softc {
 	TAILQ_HEAD(, isadev)
 		sc_subdevs;		/* list of all children */
 
-	bus_chipset_tag_t sc_bc;
+	bus_space_tag_t sc_iot;		/* isa io space tag */
+	bus_space_tag_t sc_memt;	/* isa mem space tag */
+
 	isa_chipset_tag_t sc_ic;
 
 	/*
 	 * This i/o handle is used to map port 0x84, which is
-	 * read to provide a 1.25us delay.  This i/o handle
+	 * read to provide a 1.25us delay.  This access handle
 	 * is mapped in isaattach(), and exported to drivers
 	 * via isa_attach_args.
 	 */
-	bus_io_handle_t   sc_delayioh;
+	bus_space_handle_t   sc_delaybah;
 
 	/*
 	 * This points to the isapnp_softc structure that holds
diff --git a/sys/dev/isa/lpt.c b/sys/dev/isa/lpt.c
index 1989ab94f2f..de0bda2d16b 100644
--- a/sys/dev/isa/lpt.c
+++ b/sys/dev/isa/lpt.c
@@ -1,5 +1,5 @@
-/*	$OpenBSD: lpt.c,v 1.19 1996/11/12 20:30:41 niklas Exp $ */
-/*	$NetBSD: lpt.c,v 1.39 1996/05/12 23:53:06 mycroft Exp $	*/
+/*	$OpenBSD: lpt.c,v 1.20 1996/11/29 22:55:04 niklas Exp $ */
+/*	$NetBSD: lpt.c,v 1.42 1996/10/21 22:41:14 thorpej Exp $	*/
 
 /*
  * Copyright (c) 1993, 1994 Charles Hannum.
@@ -66,12 +66,14 @@
 #include <sys/conf.h>
 #include <sys/syslog.h>
 
-#include <machine/bus.old.h>
+#include <machine/bus.h>
 #include <machine/intr.h>
 
 #include <dev/isa/isavar.h>
 #include <dev/isa/lptreg.h>
 
+#include "lpt.h"
+
 #define	TIMEOUT		hz*16	/* wait up to 16 seconds for a ready */
 #define	STEP		hz/4
 
@@ -94,8 +96,8 @@ struct lpt_softc {
 	u_char *sc_cp;
 	int sc_spinmax;
 	int sc_iobase;
-	bus_chipset_tag_t sc_bc;
-	bus_io_handle_t sc_ioh;
+	bus_space_tag_t sc_iot;
+	bus_space_handle_t sc_ioh;
 	int sc_irq;
 	u_char sc_state;
 #define	LPT_OPEN	0x01	/* device is open */
@@ -114,11 +116,13 @@ cdev_decl(lpt);
 
 int lptintr __P((void *));
 
-int lptprobe __P((struct device *, void *, void *));
-void lptattach __P((struct device *, struct device *, void *));
+#if NLPT_ISA
+int lpt_isa_probe __P((struct device *, void *, void *));
+void lpt_isa_attach __P((struct device *, struct device *, void *));
 struct cfattach lpt_isa_ca = {
-	sizeof(struct lpt_softc), lptprobe, lptattach
+	sizeof(struct lpt_softc), lpt_isa_probe, lpt_isa_attach
 };
+#endif
 
 struct cfdriver lpt_cd = {
 	NULL, "lpt", DV_TTY
@@ -129,36 +133,36 @@ struct cfdriver lpt_cd = {
 
 #define	LPS_INVERT	(LPS_SELECT|LPS_NERR|LPS_NBSY|LPS_NACK)
 #define	LPS_MASK	(LPS_SELECT|LPS_NERR|LPS_NBSY|LPS_NACK|LPS_NOPAPER)
-#define	NOT_READY()	((bus_io_read_1(bc, ioh, lpt_status) ^ LPS_INVERT) & LPS_MASK)
-#define	NOT_READY_ERR()	not_ready(bus_io_read_1(bc, ioh, lpt_status), sc)
+#define	NOT_READY()	((bus_space_read_1(iot, ioh, lpt_status) ^ LPS_INVERT) & LPS_MASK)
+#define	NOT_READY_ERR()	not_ready(bus_space_read_1(iot, ioh, lpt_status), sc)
 static int not_ready __P((u_char, struct lpt_softc *));
 
 static void lptwakeup __P((void *arg));
 static int pushbytes __P((struct lpt_softc *));
 
-int	lpt_port_test __P((bus_chipset_tag_t, bus_io_handle_t, bus_io_addr_t,
-	    bus_io_size_t, u_char, u_char));
+int	lpt_port_test __P((bus_space_tag_t, bus_space_handle_t, bus_addr_t,
+	    bus_size_t, u_char, u_char));
 
 /*
  * Internal routine to lptprobe to do port tests of one byte value.
  */
 int
-lpt_port_test(bc, ioh, base, off, data, mask)
-	bus_chipset_tag_t bc;
-	bus_io_handle_t ioh;
-	bus_io_addr_t base;
-	bus_io_size_t off;
+lpt_port_test(iot, ioh, base, off, data, mask)
+	bus_space_tag_t iot;
+	bus_space_handle_t ioh;
+	bus_addr_t base;
+	bus_size_t off;
 	u_char data, mask;
 {
 	int timeout;
 	u_char temp;
 
 	data &= mask;
-	bus_io_write_1(bc, ioh, off, data);
+	bus_space_write_1(iot, ioh, off, data);
 	timeout = 1000;
 	do {
 		delay(10);
-		temp = bus_io_read_1(bc, ioh, off) & mask;
+		temp = bus_space_read_1(iot, ioh, off) & mask;
 	} while (temp != data && --timeout);
 	LPRINTF(("lpt: port=0x%x out=0x%x in=0x%x timeout=%d\n", base + off,
 	    data, temp, timeout));
@@ -186,55 +190,60 @@ lpt_port_test(bc, ioh, base, off, data, mask)
  *
  *	3) Set the data and control ports to a value of 0
  */
+#if NLPT_ISA
 int
-lptprobe(parent, match, aux)
+lpt_isa_probe(parent, match, aux)
 	struct device *parent;
 	void *match, *aux;
 {
 	struct isa_attach_args *ia = aux;
-	bus_chipset_tag_t bc;
-	bus_io_handle_t ioh;
+	bus_space_tag_t iot;
+	bus_space_handle_t ioh;
 	u_long base;
 	u_char mask, data;
 	int i, rv;
 
 #ifdef DEBUG
-#define	ABORT	do {printf("lptprobe: mask %x data %x failed\n", mask, data); \
-		    goto out;} while (0)
+#define	ABORT								     \
+	do {								     \
+		printf("lpt_isa_probe: mask %x data %x failed\n", mask,	     \
+		    data);						     \
+		goto out;						     \
+	} while (0)
 #else
 #define	ABORT	goto out
 #endif
 
-	bc = ia->ia_bc;
+	iot = ia->ia_iot;
 	base = ia->ia_iobase;
-	if (bus_io_map(bc, base, LPT_NPORTS, &ioh))
+	if (bus_space_map(iot, base, LPT_NPORTS, 0, &ioh))
 		return 0;
 
 	rv = 0;
 	mask = 0xff;
 
 	data = 0x55;				/* Alternating zeros */
-	if (!lpt_port_test(bc, ioh, base, lpt_data, data, mask))
+	if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask))
 		ABORT;
 
 	data = 0xaa;				/* Alternating ones */
-	if (!lpt_port_test(bc, ioh, base, lpt_data, data, mask))
+	if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask))
 		ABORT;
 
 	for (i = 0; i < CHAR_BIT; i++) {	/* Walking zero */
 		data = ~(1 << i);
-		if (!lpt_port_test(bc, ioh, base, lpt_data, data, mask))
+		if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask))
 			ABORT;
 	}
 
 	for (i = 0; i < CHAR_BIT; i++) {	/* Walking one */
 		data = (1 << i);
-		if (!lpt_port_test(bc, ioh, base, lpt_data, data, mask))
+		if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask))
 			ABORT;
 	}
 
-	bus_io_write_1(bc, ioh, lpt_data, 0);
-	bus_io_write_1(bc, ioh, lpt_control, 0);
+	bus_space_write_1(iot, ioh, lpt_data, 0);
+	bus_space_write_1(iot, ioh, lpt_control, 0);
 
 	ia->ia_iosize = LPT_NPORTS;
 	ia->ia_msize = 0;
@@ -242,19 +251,21 @@ lptprobe(parent, match, aux)
 	rv = 1;
 
 out:
-	bus_io_unmap(bc, ioh, LPT_NPORTS);
+	bus_space_unmap(iot, ioh, LPT_NPORTS);
 	return rv;
 }
+#endif
 
+#if NLPT_ISA
 void
-lptattach(parent, self, aux)
+lpt_isa_attach(parent, self, aux)
 	struct device *parent, *self;
 	void *aux;
 {
 	struct lpt_softc *sc = (void *)self;
 	struct isa_attach_args *ia = aux;
-	bus_chipset_tag_t bc;
-	bus_io_handle_t ioh;
+	bus_space_tag_t iot;
+	bus_space_handle_t ioh;
 
 	if (ia->ia_irq != IRQUNK)
 		printf("\n");
@@ -265,17 +276,18 @@ lptattach(parent, self, aux)
 	sc->sc_irq = ia->ia_irq;
 	sc->sc_state = 0;
 
-	bc = sc->sc_bc = ia->ia_bc;
-	if (bus_io_map(bc, sc->sc_iobase, LPT_NPORTS, &ioh))
-		panic("lptattach: couldn't map I/O ports");
+	iot = sc->sc_iot = ia->ia_iot;
+	if (bus_space_map(iot, sc->sc_iobase, LPT_NPORTS, 0, &ioh))
+		panic("lpt_isa_attach: couldn't map I/O ports");
 	sc->sc_ioh = ioh;
 
-	bus_io_write_1(bc, ioh, lpt_control, LPC_NINIT);
+	bus_space_write_1(iot, ioh, lpt_control, LPC_NINIT);
 
 	if (ia->ia_irq != IRQUNK)
 		sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE,
 		    IPL_TTY, lptintr, sc, sc->sc_dev.dv_xname);
 }
+#endif
 
 /*
  * Reset the printer, then wait until it's selected and not busy.
@@ -290,8 +302,8 @@ lptopen(dev, flag, mode, p)
 	int unit = LPTUNIT(dev);
 	u_char flags = LPTFLAGS(dev);
 	struct lpt_softc *sc;
-	bus_chipset_tag_t bc;
-	bus_io_handle_t ioh;
+	bus_space_tag_t iot;
+	bus_space_handle_t ioh;
 	u_char control;
 	int error;
 	int spin;
@@ -317,17 +329,17 @@ lptopen(dev, flag, mode, p)
 	sc->sc_state = LPT_INIT;
 	sc->sc_flags = flags;
 	LPRINTF(("%s: open: flags=0x%x\n", sc->sc_dev.dv_xname, flags));
-	bc = sc->sc_bc;
+	iot = sc->sc_iot;
 	ioh = sc->sc_ioh;
 
 	if ((flags & LPT_NOPRIME) == 0) {
 		/* assert INIT for 100 usec to start up printer */
-		bus_io_write_1(bc, ioh, lpt_control, LPC_SELECT);
+		bus_space_write_1(iot, ioh, lpt_control, LPC_SELECT);
 		delay(100);
 	}
 
 	control = LPC_SELECT | LPC_NINIT;
-	bus_io_write_1(bc, ioh, lpt_control, control);
+	bus_space_write_1(iot, ioh, lpt_control, control);
 
 	/* wait till ready (printer running diagnostics) */
 	for (spin = 0; NOT_READY_ERR(); spin += STEP) {
@@ -349,7 +361,7 @@ lptopen(dev, flag, mode, p)
 	if (flags & LPT_AUTOLF)
 		control |= LPC_AUTOLF;
 	sc->sc_control = control;
-	bus_io_write_1(bc, ioh, lpt_control, control);
+	bus_space_write_1(iot, ioh, lpt_control, control);
 
 	sc->sc_inbuf = geteblk(LPT_BSIZE);
 	sc->sc_count = 0;
@@ -409,8 +421,8 @@ lptclose(dev, flag, mode, p)
 {
 	int unit = LPTUNIT(dev);
 	struct lpt_softc *sc = lpt_cd.cd_devs[unit];
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_io_handle_t ioh = sc->sc_ioh;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
 
 	if (sc->sc_count)
 		(void) pushbytes(sc);
@@ -418,9 +430,9 @@ lptclose(dev, flag, mode, p)
 	if ((sc->sc_flags & LPT_NOINTR) == 0)
 		untimeout(lptwakeup, sc);
 
-	bus_io_write_1(bc, ioh, lpt_control, LPC_NINIT);
+	bus_space_write_1(iot, ioh, lpt_control, LPC_NINIT);
 	sc->sc_state = 0;
-	bus_io_write_1(bc, ioh, lpt_control, LPC_NINIT);
+	bus_space_write_1(iot, ioh, lpt_control, LPC_NINIT);
 	brelse(sc->sc_inbuf);
 
 	LPRINTF(("%s: closed\n", sc->sc_dev.dv_xname));
@@ -431,8 +443,8 @@ int
 pushbytes(sc)
 	struct lpt_softc *sc;
 {
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_io_handle_t ioh = sc->sc_ioh;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
 	int error;
 
 	if (sc->sc_flags & LPT_NOINTR) {
@@ -460,10 +472,10 @@ pushbytes(sc)
 				break;
 			}
 
-			bus_io_write_1(bc, ioh, lpt_data, *sc->sc_cp++);
-			bus_io_write_1(bc, ioh, lpt_control, control | LPC_STROBE);
+			bus_space_write_1(iot, ioh, lpt_data, *sc->sc_cp++);
+			bus_space_write_1(iot, ioh, lpt_control, control | LPC_STROBE);
 			sc->sc_count--;
-			bus_io_write_1(bc, ioh, lpt_control, control);
+			bus_space_write_1(iot, ioh, lpt_control, control);
 
 			/* adapt busy-wait algorithm */
 			if (spin*2 + 16 < sc->sc_spinmax)
@@ -530,8 +542,8 @@ lptintr(arg)
 	void *arg;
 {
 	struct lpt_softc *sc = arg;
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_io_handle_t ioh = sc->sc_ioh;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
 
 	if (((sc->sc_state & LPT_OPEN) == 0 && sc->sc_count == 0) || (sc->sc_flags & LPT_NOINTR))
 		return 0;
@@ -543,11 +555,11 @@ lptintr(arg)
 	if (sc->sc_count) {
 		u_char control = sc->sc_control;
 		/* send char */
-		bus_io_write_1(bc, ioh, lpt_data, *sc->sc_cp++);
+		bus_space_write_1(iot, ioh, lpt_data, *sc->sc_cp++);
 		delay (50);
-		bus_io_write_1(bc, ioh, lpt_control, control | LPC_STROBE);
+		bus_space_write_1(iot, ioh, lpt_control, control | LPC_STROBE);
 		sc->sc_count--;
-		bus_io_write_1(bc, ioh, lpt_control, control);
+		bus_space_write_1(iot, ioh, lpt_control, control);
 		sc->sc_state |= LPT_OBUSY;
 	} else
 		sc->sc_state &= ~LPT_OBUSY;
diff --git a/sys/dev/isa/opti.h b/sys/dev/isa/opti.h
index 6bd5d9d1625..6f84fea1305 100644
--- a/sys/dev/isa/opti.h
+++ b/sys/dev/isa/opti.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: opti.h,v 1.3 1996/05/03 12:01:05 mickey Exp $	*/
+/*	$OpenBSD: opti.h,v 1.4 1996/11/29 22:55:05 niklas Exp $	*/
 
 /*
  * Copyright (c) 1996 Michael Shalayeff
diff --git a/sys/dev/isa/pcmcia_isa.c b/sys/dev/isa/pcmcia_isa.c
index 34b7cabb122..746cd52bcf2 100644
--- a/sys/dev/isa/pcmcia_isa.c
+++ b/sys/dev/isa/pcmcia_isa.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: pcmcia_isa.c,v 1.8 1996/11/23 21:46:44 kstailey Exp $	*/
+/*	$OpenBSD: pcmcia_isa.c,v 1.9 1996/11/29 22:55:05 niklas Exp $	*/
 /*
  * Copyright (c) 1995,1996 John T. Kohl.  All rights reserved.
  * Copyright (c) 1994 Stefan Grefen.  All rights reserved.
@@ -39,6 +39,8 @@
 #include <sys/device.h>
 #include <vm/vm.h>
 
+#include <machine/bus.h>
+
 #include <dev/pcmcia/pcmciavar.h>
 #include <dev/pcmcia/pcmciareg.h>
 
@@ -84,25 +86,25 @@ pcmcia_isa_init(parent, cf, aux, pca, flag)
 	int             flag;
 {
 	struct pcmciabus_attach_args *pa = aux;
-	bus_mem_handle_t memh;
+	bus_space_handle_t memh;
 
 #ifdef PCMCIA_ISA_DEBUG
 	if (parent != NULL)
 		printf("PARENT %s\n", parent->dv_xname);
 #endif
 	if (flag == 0) {		/* match */
-		if (bus_mem_map(pa->pba_bc, pa->pba_maddr, pa->pba_msize, 0,
-				&memh))
+		if (bus_space_map(pa->pba_memt, pa->pba_maddr, pa->pba_msize,
+		    0, &memh))
 			return 0;
 		pca->scratch_memsiz = pa->pba_msize;
 		pca->scratch_memh = memh;
-		pca->pa_bc = pa->pba_bc;
+		pca->pa_memt = pa->pba_memt;
 #ifdef PCMCIA_ISA_DEBUG
 		printf("pbaaddr %p maddr %x msize %x\n",
-		       pa, pa->pba_maddr, pa->pba_msize);
-		printf("PCA %p mem %p size %d chip %x memh %x\n",
-		       pca, pca->scratch_mem, pca->scratch_memsiz,
-		       pca->pa_bc, pca->scratch_memh);
+		    pa, pa->pba_maddr, pa->pba_msize);
+		printf("PCA %p mem %p size %d memt %x memh %x\n",
+		    pca, pca->scratch_mem, pca->scratch_memsiz,
+		    pca->pa_memt, pca->scratch_memh);
 #endif
 	}
 	return 1;
@@ -147,7 +149,8 @@ pcmcia_isa_probe(parent, match, aux, pc_link)
 	ia.ia_msize = cf->cf_loc[3];
 	ia.ia_irq = cf->cf_loc[4] == 2 ? 9 : cf->cf_loc[4] ;
 	ia.ia_drq = cf->cf_loc[5];
-	ia.ia_bc = pc_link->bus->sc_bc;
+	ia.ia_iot = pc_link->bus->sc_iot;
+	ia.ia_memt = pc_link->bus->sc_memt;
 
 #ifdef PCMCIA_ISA_DEBUG
 	printf("pcmcia probe %x %x %p\n", ia.ia_iobase, ia.ia_irq,
@@ -309,10 +312,11 @@ pcmcia_isa_unconfig(pc_link)
 		struct softc {
 			struct device   sc_dev;
 			void *sc_ih;
-			bus_chipset_tag_t sc_bc;
+			bus_space_tag_t sc_iot;
+			bus_space_tag_t sc_memt;
 		} *sc = pc_link->devp;
 		if (sc)
-			isa_intr_disestablish(sc->sc_bc, sc->sc_ih);
+			isa_intr_disestablish(sc->sc_ic, sc->sc_ih);
 	}
 #endif
 	return 0;
diff --git a/sys/dev/isa/pcmcia_pcic.c b/sys/dev/isa/pcmcia_pcic.c
index 1170e16795d..41e95247539 100644
--- a/sys/dev/isa/pcmcia_pcic.c
+++ b/sys/dev/isa/pcmcia_pcic.c
@@ -1,4 +1,4 @@
-/*	$Id: pcmcia_pcic.c,v 1.9 1996/11/23 21:46:44 kstailey Exp $	*/
+/*	$Id: pcmcia_pcic.c,v 1.10 1996/11/29 22:55:06 niklas Exp $	*/
 /*
  *  Copyright (c) 1995, 1996 John T. Kohl
  *  All rights reserved.
@@ -50,7 +50,7 @@
 #include <sys/proc.h>
 #include <sys/user.h>
 
-#include <machine/pio.h>
+#include <machine/bus.h>
 
 #include <dev/isa/isavar.h>
 #include <dev/ic/i82365reg.h>
@@ -103,26 +103,26 @@ struct slot {
 
 struct pcic_softc {
 	struct device sc_dev;
-	bus_chipset_tag_t sc_bc;
+	bus_space_tag_t sc_iot;
+	bus_space_tag_t sc_memt;
 	struct pcmcia_adapter sc_adapter;
 	void *sc_ih;
 
 	int	sc_polltimo;
 	int	sc_pcic_irq;
-	bus_io_handle_t sc_ioh;
-	bus_mem_handle_t sc_memh;
+	bus_space_handle_t sc_ioh;
+	bus_space_handle_t sc_memh;
 	u_short pcic_base;	/* base port for each board */
 	u_char	chip_inf;
 	struct slot slot[4];		/* treat up to 4 as on the same pcic */
 };
 #define pcic_parent(sc) ((struct pcicmaster_softc *)(sc)->sc_dev.dv_parent)
 
-static int      pcic_map_io __P((struct pcmcia_link *, u_int, u_int, int));
-static int      pcic_map_mem __P((struct pcmcia_link *, bus_chipset_tag_t,
-				  bus_mem_handle_t,
+int	pcic_map_io __P((struct pcmcia_link *, u_int, u_int, int));
+int	pcic_map_mem __P((struct pcmcia_link *, bus_space_tag_t, caddr_t,
 				  u_int, u_int, int));
-static int      pcic_map_intr __P((struct pcmcia_link *, int, int));
-static int      pcic_service __P((struct pcmcia_link *, int, void *, int));
+int	pcic_map_intr __P((struct pcmcia_link *, int, int));
+int	pcic_service __P((struct pcmcia_link *, int, void *, int));
 
 static struct pcmcia_funcs pcic_funcs = {
 	pcic_map_io,
@@ -138,6 +138,8 @@ int pcic_print __P((void *, const char *));
 int pcicmaster_probe __P((struct device *, void *, void *));
 void pcicmaster_attach __P((struct device  *, struct device *, void *));
 int pcicmaster_print __P((void *, const char *));
+int pcic_intr __P((void *));
+
 
 extern struct pcmciabus_link pcmcia_isa_link;
 
@@ -151,8 +153,10 @@ struct cfdriver pcic_cd = {
 
 struct pcicmaster_softc {
 	struct device sc_dev;
-	bus_chipset_tag_t sc_bc;
-	bus_io_handle_t sc_ioh;
+	isa_chipset_tag_t sc_ic;
+	bus_space_tag_t sc_iot;
+	bus_space_tag_t sc_memt;
+	bus_space_handle_t sc_ioh;
 	struct pcic_softc *sc_ctlrs[2];
 	char sc_slavestate[2];
 #define SLAVE_NOTPRESENT	0
@@ -170,8 +174,10 @@ struct cfdriver pcicmaster_cd = {
 
 struct pcic_attach_args {
 	int	pia_ctlr;		/* pcic ctlr number */
-	bus_chipset_tag_t pia_bc;	/* bus chipset tag */
-	bus_io_handle_t	pia_ioh;	/* base i/o address */
+	isa_chipset_tag_t pia_ic;	/* isa chipset tag */
+	bus_space_tag_t pia_iot;	/* bus chipset tag */
+	bus_space_tag_t pia_memt;	/* bus chipset tag */
+	bus_space_handle_t pia_ioh;	/* base i/o address */
 	int	pia_iosize;		/* span of ports used */
 	int	pia_irq;		/* interrupt request */
 	int	pia_drq;		/* DMA request */
@@ -179,9 +185,9 @@ struct pcic_attach_args {
 	u_int	pia_msize;		/* size of i/o memory */
 };
 
-static u_char pcic_rd __P((struct slot *, int));
-static void pcic_wr __P((struct slot *, int, int));
-
+static __inline u_char pcic_rd __P((struct slot *, int));
+static __inline void pcic_wr __P((struct slot *, int, int));
+static __inline int pcic_wait __P((struct slot *, int));
 
 static __inline u_char
 pcic_rd(slot, reg)
@@ -189,13 +195,13 @@ pcic_rd(slot, reg)
 	int             reg;
 {
 	u_char          res;
-	bus_chipset_tag_t bc = slot->chip->sc_bc;
-	bus_io_handle_t ioh =  slot->chip->sc_ioh;
+	bus_space_tag_t iot = slot->chip->sc_iot;
+	bus_space_handle_t ioh = slot->chip->sc_ioh;
 	if (PDEBUG(PCDRW))
 		printf("pcic_rd(%x [%x %x]) = ", reg, slot->reg_off, ioh);
-	bus_io_write_1(bc, ioh, 0, slot->reg_off + reg);
+	bus_space_write_1(iot, ioh, 0, slot->reg_off + reg);
 	delay(1);
-	res = bus_io_read_1(bc, ioh, 1);
+	res = bus_space_read_1(iot, ioh, 1);
 	if (PDEBUG(PCDRW))
 		printf("%x\n", res);
 	return res;
@@ -206,23 +212,21 @@ pcic_wr(slot, reg, val)
 	struct slot    *slot;
 	int             reg, val;
 {
-	bus_chipset_tag_t bc = slot->chip->sc_bc;
-	bus_io_handle_t ioh =  slot->chip->sc_ioh;
-	bus_io_write_1(bc, ioh, 0, slot->reg_off + reg);
+	bus_space_tag_t iot = slot->chip->sc_iot;
+	bus_space_handle_t ioh =  slot->chip->sc_ioh;
+	bus_space_write_1(iot, ioh, 0, slot->reg_off + reg);
 	delay(1);
-	bus_io_write_1(bc, ioh, 1, val);
+	bus_space_write_1(iot, ioh, 1, val);
 	if (PDEBUG(PCDRW)) {
 		int res;
 		delay(1);
-		bus_io_write_1(bc, ioh, 0, slot->reg_off + reg);
+		bus_space_write_1(iot, ioh, 0, slot->reg_off + reg);
 		delay(1);
-		res = bus_io_read_1(bc, ioh, 1);
+		res = bus_space_read_1(iot, ioh, 1);
 		printf("pcic_wr(%x %x) = %x\n", reg, val, res);
 	}
 }
 
-static __inline int pcic_wait __P((struct slot *, int));
-
 static __inline int
 pcic_wait(slot, i)
 	struct slot *slot;
@@ -242,7 +246,7 @@ pcic_probe(parent, self, aux)
 	struct pcic_softc *pcic = self;
 	struct pcicmaster_softc *pcicm = (struct pcicmaster_softc *) parent;
 	struct pcic_attach_args *pia = aux;
-	bus_mem_handle_t memh;
+	bus_space_handle_t memh;
 	u_int           chip_inf = 0, ochip_inf = 0;
 	int first = 1;
 	int             i, j, maxslot;
@@ -273,7 +277,7 @@ pcic_probe(parent, self, aux)
 	 * For other controllers, we only take up to 2 slots.
 	 */
 	pcic->sc_ioh = pia->pia_ioh;
-	pcic->sc_bc = pia->pia_bc;
+	pcic->sc_iot = pia->pia_iot;
 	pcic->sc_adapter.nslots = 0;
 	maxslot = 2;
 	for (i = j = 0; i < maxslot; i++) {
@@ -335,14 +339,11 @@ pcic_probe(parent, self, aux)
 		printf("pcic_probe failed\n");
 		delay(2000000);
 	}
-	bus_mem_unmap(pia->pia_bc, memh, pia->pia_msize);
+	bus_space_unmap(pia->pia_memt, memh, pia->pia_msize);
 	return 0;
 }
 
 int
-pcic_intr __P((void *));
-
-int
 pcic_print(aux, name)
 	void *aux;
 	const char *name;
@@ -424,15 +425,15 @@ pcic_attach(parent, self, aux)
 	    pcic->sc_polltimo = hz/2;
 	    timeout((void (*)(void *))pcic_intr, pcic, pcic->sc_polltimo);
 	} else {
-	    pcic->sc_ih = isa_intr_establish(pia->pia_bc,
-					     pia->pia_irq, IST_EDGE,
-					     IPL_PCMCIA, pcic_intr, pcic, pcic->sc_dev.dv_xname);
+	    pcic->sc_ih = isa_intr_establish(pia->pia_ic, pia->pia_irq,
+		IST_EDGE, IPL_PCMCIA, pcic_intr, pcic, pcic->sc_dev.dv_xname);
 	    pcic->sc_polltimo = 0;
 	}
 	/*
 	 * Probe the pcmciabus at this controller.
 	 */
-	pba.pba_bc = pia->pia_bc;
+	pba.pba_iot = pia->pia_iot;
+	pba.pba_memt = pia->pia_memt;
 	pba.pba_maddr = pia->pia_maddr;
 	pba.pba_msize = pia->pia_msize;
 	pba.pba_aux = &pcic->sc_adapter;
@@ -445,7 +446,7 @@ pcic_attach(parent, self, aux)
 
 int
 pcic_intr(arg)
-void *arg;
+	void *arg;
 {
 	struct pcic_softc *pcic = arg;
 	u_char statchg, intgen;
@@ -500,7 +501,7 @@ void *arg;
 	return 1;
 }
 
-static int
+int
 pcic_map_io(link, start, len, flags)
 	struct pcmcia_link *link;
 	u_int           start, len;
@@ -622,18 +623,17 @@ pcic_map_io(link, start, len, flags)
 	}
 }
 
-static int
-pcic_map_mem(link, bc, ioh, start, len, flags)
+int
+pcic_map_mem(link, memt, haddr, start, len, flags)
 	struct pcmcia_link *link;
-	bus_chipset_tag_t bc;
-	bus_mem_handle_t ioh;
+	bus_space_tag_t memt;
+	caddr_t		haddr;
 	u_int           start, len;
 	int		flags;
 {
 	vm_offset_t     physaddr;
 	struct pcic_softc *sc = link->adapter->adapter_softc;
 	struct slot    *slot;
-	caddr_t haddr = ioh;		/* XXX */
 	if (link->slot >= sc->sc_adapter.nslots)
 		return ENXIO;
 
@@ -755,7 +755,7 @@ pcic_map_mem(link, bc, ioh, start, len, flags)
 	}
 }
 
-static int
+int
 pcic_map_intr(link, irq, flags)
 	struct pcmcia_link *link;
 	int             irq, flags;
@@ -787,7 +787,7 @@ pcic_map_intr(link, irq, flags)
 }
 
 
-static int
+int
 pcic_service(link, opcode, arg, flags)
 	struct pcmcia_link *link;
 	int             opcode;
@@ -939,20 +939,20 @@ pcicmaster_probe(parent, self, aux)
 	struct pcicmaster_softc *pcicm = self;
 	struct isa_attach_args *ia = aux;
 	struct cfdata *cf = pcicm->sc_dev.dv_cfdata;
-	bus_chipset_tag_t bc;
-	bus_io_handle_t ioh;
+	bus_space_tag_t iot;
+	bus_space_handle_t ioh;
 
 	u_int           chip_inf = 0;
 	int             i, j;
-	int rval = 0;
+	int		rval = 0;
 	struct pcic_softc pcic;		/* faked up for probing only */
 
 	if (PDEBUG(PCDCONF)) {
 		printf("pcicmaster_probe\n");
 		delay(2000000);
 	}
-	bc = ia->ia_bc;
-	if (bus_io_map(bc, ia->ia_iobase, PCIC_NPORTS, &ioh))
+	iot = ia->ia_iot;
+	if (bus_space_map(iot, ia->ia_iobase, PCIC_NPORTS, 0, &ioh))
 		return (0);
 	/*
 	 * Probe the slots for each of the possible child controllers,
@@ -999,10 +999,12 @@ pcicmaster_probe(parent, self, aux)
 	}
 	if (rval) {
 		ia->ia_iosize = 2;
-		pcicm->sc_bc = bc;
+		pcicm->sc_ic = ia->ia_ic;
+		pcicm->sc_iot = iot;
+		pcicm->sc_memt = ia->ia_memt;
 		pcicm->sc_ioh = ioh;
 	} else
-	    bus_io_unmap(bc, ioh, PCIC_NPORTS);
+	    bus_space_unmap(iot, ioh, PCIC_NPORTS);
 	return rval;
 }
 
@@ -1011,10 +1013,11 @@ pcicmaster_attach(parent, self, aux)
 	struct device  *parent, *self;
 	void           *aux;
 {
-	struct pcicmaster_softc *pcicm = (void *) self;
+	struct pcicmaster_softc *pcicm = (void *)self;
 	struct isa_attach_args *ia = aux;
 	struct pcic_attach_args pia;
 	int i;
+
 	printf("\n");
 	if (PDEBUG(PCDCONF)) {
 		printf("pcicmaster_attach\n");
@@ -1034,7 +1037,9 @@ pcicmaster_attach(parent, self, aux)
 			/*
 			 * share the I/O space and memory mapping space.
 			 */
-			pia.pia_bc = pcicm->sc_bc;
+			pia.pia_ic = pcicm->sc_ic;
+			pia.pia_iot = pcicm->sc_iot;
+			pia.pia_memt = pcicm->sc_memt;
 			pia.pia_ioh = pcicm->sc_ioh;
 			pia.pia_iosize = ia->ia_iosize;
 			pia.pia_drq = ia->ia_drq;
diff --git a/sys/dev/isa/rtfps.c b/sys/dev/isa/rtfps.c
index d8e87928a33..03207c4a6db 100644
--- a/sys/dev/isa/rtfps.c
+++ b/sys/dev/isa/rtfps.c
@@ -1,5 +1,5 @@
-/*	$OpenBSD: rtfps.c,v 1.13 1996/11/23 21:46:45 kstailey Exp $       */
-/*	$NetBSD: rtfps.c,v 1.23 1996/05/12 23:53:29 mycroft Exp $	*/
+/*	$OpenBSD: rtfps.c,v 1.14 1996/11/29 22:55:07 niklas Exp $       */
+/*	$NetBSD: rtfps.c,v 1.27 1996/10/21 22:41:18 thorpej Exp $	*/
 
 /*
  * Copyright (c) 1996 Christopher G. Demetriou.  All rights reserved.
@@ -39,7 +39,7 @@
 #include <sys/device.h>
 #include <sys/termios.h>
 
-#include <machine/bus.old.h>
+#include <machine/bus.h>
 #include <machine/intr.h>
 
 #include <dev/isa/isavar.h>
@@ -52,14 +52,15 @@ struct rtfps_softc {
 	struct device sc_dev;
 	void *sc_ih;
 
-	bus_chipset_tag_t sc_bc;
+	bus_space_tag_t sc_iot;
+	isa_chipset_tag_t sc_ic;
 	int sc_iobase;
 	int sc_irqport;
-	bus_io_handle_t sc_irqioh;
+	bus_space_handle_t sc_irqioh;
 
 	int sc_alive;			/* mask of slave units attached */
 	void *sc_slaves[NSLAVES];	/* com device unit numbers */
-	bus_io_handle_t sc_slaveioh[NSLAVES];
+	bus_space_handle_t sc_slaveioh[NSLAVES];
 };
 
 int rtfpsprobe __P((struct device *, void *, void *));
@@ -83,8 +84,8 @@ rtfpsprobe(parent, self, aux)
 {
 	struct isa_attach_args *ia = aux;
 	int iobase = ia->ia_iobase;
-	bus_chipset_tag_t bc = ia->ia_bc;
-	bus_io_handle_t ioh;
+	bus_space_tag_t iot = ia->ia_iot;
+	bus_space_handle_t ioh;
 	int i, rv = 1;
 
 	/*
@@ -98,12 +99,12 @@ rtfpsprobe(parent, self, aux)
 	if (iobase == comconsaddr && !comconsattached)
 		goto checkmappings;
 
-	if (bus_io_map(bc, iobase, COM_NPORTS, &ioh)) {
+	if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
 		rv = 0;
 		goto out;
 	}
-	rv = comprobe1(bc, ioh, iobase);
-	bus_io_unmap(bc, ioh, COM_NPORTS);
+	rv = comprobe1(iot, ioh, iobase);
+	bus_space_unmap(iot, ioh, COM_NPORTS);
 	if (rv == 0)
 		goto out;
 
@@ -114,11 +115,11 @@ checkmappings:
 		if (iobase == comconsaddr && !comconsattached)
 			continue;
 
-		if (bus_io_map(bc, iobase, COM_NPORTS, &ioh)) {
+		if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
 			rv = 0;
 			goto out;
 		}
-		bus_io_unmap(bc, ioh, COM_NPORTS);
+		bus_space_unmap(iot, ioh, COM_NPORTS);
 	}
 
 out:
@@ -154,10 +155,11 @@ rtfpsattach(parent, self, aux)
 		IOBASEUNK,     0x2f2,     0x6f2,     0x6f3,
 		IOBASEUNK, IOBASEUNK, IOBASEUNK, IOBASEUNK
 	};
-	bus_chipset_tag_t bc = ia->ia_bc;
+	bus_space_tag_t iot = ia->ia_iot;
 	int i;
 
-	sc->sc_bc = ia->ia_bc;
+	sc->sc_iot = ia->ia_iot;
+	sc->sc_ic = ia->ia_ic;
 	sc->sc_iobase = ia->ia_iobase;
 
 	if (ia->ia_irq >= 16 || irqport[ia->ia_irq] == IOBASEUNK)
@@ -165,20 +167,21 @@ rtfpsattach(parent, self, aux)
 	sc->sc_irqport = irqport[ia->ia_irq];
 
 	for (i = 0; i < NSLAVES; i++)
-		if (bus_io_map(bc, sc->sc_iobase + i * COM_NPORTS, COM_NPORTS,
-		    &sc->sc_slaveioh[i]))
+		if (bus_space_map(iot, sc->sc_iobase + i * COM_NPORTS,
+		    COM_NPORTS, 0, &sc->sc_slaveioh[i]))
 			panic("rtfpsattach: couldn't map slave %d", i);
-	if (bus_io_map(bc, sc->sc_irqport, 1, &sc->sc_irqioh))
+	if (bus_space_map(iot, sc->sc_irqport, 1, 0, &sc->sc_irqioh))
 		panic("rtfpsattach: couldn't map irq port at 0x%x\n",
 		    sc->sc_irqport);
 
-	bus_io_write_1(bc, sc->sc_irqioh, 0, 0);
+	bus_space_write_1(iot, sc->sc_irqioh, 0, 0);
 
 	printf("\n");
 
 	for (i = 0; i < NSLAVES; i++) {
 		ca.ca_slave = i;
-		ca.ca_bc = sc->sc_bc;
+		ca.ca_iot = sc->sc_iot;
+		ca.ca_ic = sc->sc_ic;
 		ca.ca_ioh = sc->sc_slaveioh[i];
 		ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS;
 		ca.ca_noien = 0;
@@ -197,10 +200,10 @@ rtfpsintr(arg)
 	void *arg;
 {
 	struct rtfps_softc *sc = arg;
-	bus_chipset_tag_t bc = sc->sc_bc;
+	bus_space_tag_t iot = sc->sc_iot;
 	int alive = sc->sc_alive;
 
-	bus_io_write_1(bc, sc->sc_irqioh, 0, 0);
+	bus_space_write_1(iot, sc->sc_irqioh, 0, 0);
 
 #define	TRY(n) \
 	if (alive & (1 << (n))) \
diff --git a/sys/dev/isa/sbdspvar.h b/sys/dev/isa/sbdspvar.h
index c290671ac4b..e25349a2626 100644
--- a/sys/dev/isa/sbdspvar.h
+++ b/sys/dev/isa/sbdspvar.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sbdspvar.h,v 1.5 1996/05/07 07:37:46 deraadt Exp $	*/
+/*	$OpenBSD: sbdspvar.h,v 1.6 1996/11/29 22:55:07 niklas Exp $	*/
 /*	$NetBSD: sbdspvar.h,v 1.13 1996/04/29 20:28:50 christos Exp $	*/
 
 /*
diff --git a/sys/dev/isa/wd.c b/sys/dev/isa/wd.c
index f7598ef038e..9eabee7e782 100644
--- a/sys/dev/isa/wd.c
+++ b/sys/dev/isa/wd.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: wd.c,v 1.22 1996/11/28 08:23:38 downsj Exp $	*/
+/*	$OpenBSD: wd.c,v 1.23 1996/11/29 22:55:08 niklas Exp $	*/
 /*	$NetBSD: wd.c,v 1.150 1996/05/12 23:54:03 mycroft Exp $ */
 
 /*
@@ -53,7 +53,7 @@
 
 #include <vm/vm.h>
 
-#include <machine/bus.old.h>
+#include <machine/bus.h>
 #include <machine/cpu.h>
 #include <machine/intr.h>
 
@@ -858,14 +858,15 @@ wddump(dev, blkno, va, size)
 		}
 
 #ifndef WD_DUMP_NOT_TRUSTED
-		if (wdccommand(d_link, WDCC_WRITE, d_link->sc_drive, cylin, head, sector, 1) != 0 ||
+		if (wdccommand(d_link, WDCC_WRITE, d_link->sc_drive, cylin,
+		    head, sector, 1) != 0 ||
 		    wait_for_drq(wdc) != 0) {
 			wderror(d_link, NULL, "wddump: write failed");
 			return EIO;
 		}
 	
 		/* XXX XXX XXX */
-		bus_io_write_multi_2(wdc->sc_bc, wdc->sc_ioh, wd_data,
+		bus_space_write_multi_2(wdc->sc_iot, wdc->sc_ioh, wd_data,
 		    (u_int16_t *)va, lp->d_secsize >> 1);
 	
 		/* Check data request (should be done). */
diff --git a/sys/dev/isa/wdc.c b/sys/dev/isa/wdc.c
index 98c2a2595a9..e98d4faa610 100644
--- a/sys/dev/isa/wdc.c
+++ b/sys/dev/isa/wdc.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: wdc.c,v 1.16 1996/11/28 08:23:39 downsj Exp $	*/
+/*	$OpenBSD: wdc.c,v 1.17 1996/11/29 22:55:09 niklas Exp $	*/
 /*	$NetBSD: wd.c,v 1.150 1996/05/12 23:54:03 mycroft Exp $ */
 
 /*
@@ -57,7 +57,7 @@
 
 #include <vm/vm.h>
 
-#include <machine/bus.old.h>
+#include <machine/bus.h>
 #include <machine/cpu.h>
 #include <machine/intr.h>
 
@@ -130,8 +130,8 @@ wdcprobe(parent, match, aux)
 	struct device *parent;
 	void *match, *aux;
 {
-	bus_chipset_tag_t bc;
-	bus_io_handle_t ioh;
+	bus_space_tag_t iot;
+	bus_space_handle_t ioh;
 	struct wdc_softc *wdc = match;
 	struct isa_attach_args *ia = aux;
 
@@ -142,27 +142,27 @@ wdcprobe(parent, match, aux)
 	}
 #endif
 
-	wdc->sc_bc = bc = ia->ia_bc;
-	if (bus_io_map(bc, ia->ia_iobase, 8, &ioh))
+	wdc->sc_iot = iot = ia->ia_iot;
+	if (bus_space_map(iot, ia->ia_iobase, 8, 0, &ioh))
 		return (0);
 	wdc->sc_ioh = ioh;
 
 	/* Check if we have registers that work. */
 	/* Error register not writable, */
-	bus_io_write_1(bc, ioh, wd_error, 0x5a);
+	bus_space_write_1(iot, ioh, wd_error, 0x5a);
 	/* but all of cyl_lo are. */
-	bus_io_write_1(bc, ioh, wd_cyl_lo, 0xa5);
-	if (bus_io_read_1(bc, ioh, wd_error) == 0x5a ||
-	    bus_io_read_1(bc, ioh, wd_cyl_lo) != 0xa5) {
+	bus_space_write_1(iot, ioh, wd_cyl_lo, 0xa5);
+	if (bus_space_read_1(iot, ioh, wd_error) == 0x5a ||
+	    bus_space_read_1(iot, ioh, wd_cyl_lo) != 0xa5) {
 		/*
 		 * Test for a controller with no IDE master, just one
 		 * ATAPI device. Select drive 1, and try again.
 		 */
-		bus_io_write_1(bc, ioh, wd_sdh, WDSD_IBM | 0x10);
-		bus_io_write_1(bc, ioh, wd_error, 0x5a);
-		bus_io_write_1(bc, ioh, wd_cyl_lo, 0xa5);
-		if (bus_io_read_1(bc, ioh, wd_error) == 0x5a ||
-		    bus_io_read_1(bc, ioh, wd_cyl_lo) != 0xa5)
+		bus_space_write_1(iot, ioh, wd_sdh, WDSD_IBM | 0x10);
+		bus_space_write_1(iot, ioh, wd_error, 0x5a);
+		bus_space_write_1(iot, ioh, wd_cyl_lo, 0xa5);
+		if (bus_space_read_1(iot, ioh, wd_error) == 0x5a ||
+		    bus_space_read_1(iot, ioh, wd_cyl_lo) != 0xa5)
 			return 0;
 		wdc->sc_flags |= WDCF_ONESLAVE;
 	}
@@ -175,16 +175,16 @@ wdcprobe(parent, match, aux)
 
 	/* Select drive 0 or ATAPI slave device */
 	if (wdc->sc_flags & WDCF_ONESLAVE)
-		bus_io_write_1(bc, ioh, wd_sdh, WDSD_IBM | 0x10);
+		bus_space_write_1(iot, ioh, wd_sdh, WDSD_IBM | 0x10);
 	else
-		bus_io_write_1(bc, ioh, wd_sdh, WDSD_IBM);
+		bus_space_write_1(iot, ioh, wd_sdh, WDSD_IBM);
 
 	/* Wait for controller to become ready. */
 	if (wait_for_unbusy(wdc) < 0)
 		return 0;
     
 	/* Start drive diagnostics. */
-	bus_io_write_1(bc, ioh, wd_command, WDCC_DIAGNOSE);
+	bus_space_write_1(iot, ioh, wd_command, WDCC_DIAGNOSE);
 
 	/* Wait for command to complete. */
 	if (wait_for_unbusy(wdc) < 0)
@@ -339,8 +339,8 @@ wdc_ata_start(wdc, xfer)
 	struct wdc_softc *wdc;
 	struct wdc_xfer *xfer;
 {
-	bus_chipset_tag_t bc = wdc->sc_bc;
-	bus_io_handle_t ioh = wdc->sc_ioh;
+	bus_space_tag_t iot = wdc->sc_iot;
+	bus_space_handle_t ioh = wdc->sc_ioh;
 	struct wd_link *d_link = xfer->d_link;
 	struct buf *bp = xfer->c_bp;
 	int nblks;
@@ -392,7 +392,7 @@ wdc_ata_start(wdc, xfer)
 		xfer->c_blkno = blkno / (d_link->sc_lp->d_secsize / DEV_BSIZE);
 	} else {
 		WDDEBUG_PRINT((" %d)0x%x", xfer->c_skip,
-		    bus_io_read_1(bc, ioh, wd_altsts)));
+		    bus_space_read_1(iot, ioh, wd_altsts)));
 	}
 
 	/*
@@ -523,7 +523,7 @@ wdc_ata_start(wdc, xfer)
 
 		WDDEBUG_PRINT(("sector %d cylin %d head %d addr %x sts %x\n",
 		    sector, cylin, head, xfer->databuf,
-		    bus_io_read_1(bc, ioh, wd_altsts)));
+		    bus_space_read_1(iot, ioh, wd_altsts)));
 
 	} else if (xfer->c_nblks > 1) {
 		/* The number of blocks in the last stretch may be smaller. */
@@ -546,10 +546,10 @@ wdc_ata_start(wdc, xfer)
 
 		/* Push out data. */
 		if ((d_link->sc_flags & WDF_32BIT) == 0)
-			bus_io_write_raw_multi_2(bc, ioh, wd_data,
+			bus_space_write_raw_multi_2(iot, ioh, wd_data,
 			    xfer->databuf + xfer->c_skip, xfer->c_nbytes);
 		else
-			bus_io_write_raw_multi_4(bc, ioh, wd_data,
+			bus_space_write_raw_multi_4(iot, ioh, wd_data,
 			    xfer->databuf + xfer->c_skip, xfer->c_nbytes);
 	}
 
@@ -564,14 +564,14 @@ wait_for_phase(wdc, wphase)
 	struct wdc_softc *wdc;
 	int wphase;
 {
-	bus_chipset_tag_t bc = wdc->sc_bc;
-	bus_io_handle_t ioh = wdc->sc_ioh;
+	bus_space_tag_t iot = wdc->sc_iot;
+	bus_space_handle_t ioh = wdc->sc_ioh;
 	int i, phase;
 
 	for (i = 20000; i; i--) {
-		phase = (bus_io_read_1(bc, ioh, wd_ireason) &
+		phase = (bus_space_read_1(iot, ioh, wd_ireason) &
 		    (WDCI_CMD | WDCI_IN)) |
-		    (bus_io_read_1(bc, ioh, wd_status)
+		    (bus_space_read_1(iot, ioh, wd_status)
 		    & WDCS_DRQ);
 		if (phase == wphase)
 			break;
@@ -585,14 +585,14 @@ wait_for_unphase(wdc, wphase)
 	struct wdc_softc *wdc;
 	int wphase;
 {
-	bus_chipset_tag_t bc = wdc->sc_bc;
-	bus_io_handle_t ioh = wdc->sc_ioh;
+	bus_space_tag_t iot = wdc->sc_iot;
+	bus_space_handle_t ioh = wdc->sc_ioh;
 	int i, phase;
 
 	for (i = 20000; i; i--) {
-		phase = (bus_io_read_1(bc, ioh, wd_ireason) &
+		phase = (bus_space_read_1(iot, ioh, wd_ireason) &
 		    (WDCI_CMD | WDCI_IN)) |
-		    (bus_io_read_1(bc, ioh, wd_status)
+		    (bus_space_read_1(iot, ioh, wd_status)
 		    & WDCS_DRQ);
 		if (phase != wphase)
 			break;
@@ -606,8 +606,8 @@ wdc_atapi_start(wdc, xfer)
 	struct wdc_softc *wdc;
 	struct wdc_xfer *xfer;
 {
-	bus_chipset_tag_t bc = wdc->sc_bc;
-	bus_io_handle_t ioh = wdc->sc_ioh;
+	bus_space_tag_t iot = wdc->sc_iot;
+	bus_space_handle_t ioh = wdc->sc_ioh;
 	struct atapi_command_packet *acp = xfer->atapi_cmd;
 
 #ifdef ATAPI_DEBUG_WDC
@@ -615,7 +615,7 @@ wdc_atapi_start(wdc, xfer)
 #endif
 	if (wdc->sc_errors >= WDIORETRIES) {
 		acp->status |= ERROR;
-		acp->error = bus_io_read_1(bc, ioh, wd_error);
+		acp->error = bus_space_read_1(iot, ioh, wd_error);
 		wdc_atapi_done(wdc, xfer);
 		return;
 	}
@@ -640,7 +640,8 @@ wdc_atapi_start(wdc, xfer)
 			int phase = wait_for_phase(wdc, PHASE_CMDOUT);
 
 			if (phase != PHASE_CMDOUT) {
-				printf("wdc_atapi_start: timeout waiting PHASE_CMDOUT, got 0x%x\n", phase);
+				printf("wdc_atapi_start: timeout waiting "
+				    "PHASE_CMDOUT, got 0x%x\n", phase);
 
 				/* NEC SUCKS. */
 				wdc->sc_flags |= WDCF_BROKENPOLL;
@@ -648,7 +649,7 @@ wdc_atapi_start(wdc, xfer)
 		} else
 			DELAY(10);	/* Simply pray for the data. */
 
-		bus_io_write_raw_multi_2(bc, ioh, wd_data, acp->command,
+		bus_space_write_raw_multi_2(iot, ioh, wd_data, acp->command,
 		    acp->command_size);
 	}
 	wdc->sc_flags |= WDCF_IRQ_WAIT;
@@ -675,8 +676,8 @@ wdcintr(arg)
 	struct wdc_xfer *xfer;
 
 	if ((wdc->sc_flags & WDCF_IRQ_WAIT) == 0) {
-		bus_chipset_tag_t bc = wdc->sc_bc;
-		bus_io_handle_t ioh = wdc->sc_ioh;
+		bus_space_tag_t iot = wdc->sc_iot;
+		bus_space_handle_t ioh = wdc->sc_ioh;
 		u_char s;
 #ifdef ATAPI_DEBUG_WDC
 		u_char e, i;
@@ -684,24 +685,26 @@ wdcintr(arg)
 		DELAY(100);
 
 		/* Clear the pending interrupt and abort. */
-		s = bus_io_read_1(bc, ioh, wd_status);
+		s = bus_space_read_1(iot, ioh, wd_status);
 		if (s != (WDCS_DRDY|WDCS_DSC)) {
 #ifdef ATAPI_DEBUG_WDC
-			e = bus_io_read_1(bc, ioh, wd_error);
-			i = bus_io_read_1(bc, ioh, wd_seccnt);
+			e = bus_space_read_1(iot, ioh, wd_error);
+			i = bus_space_read_1(iot, ioh, wd_seccnt);
 
 			printf("wdcintr: inactive controller, "
 			    "punting st=%02x er=%02x irr=%02x\n", s, e, i);
 #else
-			(void)bus_io_read_1(bc, ioh, wd_error);
-			(void)bus_io_read_1(bc, ioh, wd_seccnt);
+			(void)bus_space_read_1(iot, ioh, wd_error);
+			(void)bus_space_read_1(iot, ioh, wd_seccnt);
 #endif
 
 			if (s & WDCS_DRQ) {
-				int len = bus_io_read_1(bc, ioh, wd_cyl_lo) +
-				    256 * bus_io_read_1(bc, ioh, wd_cyl_hi);
+				int len = 256 * bus_space_read_1(iot, ioh,
+				    wd_cyl_hi) +
+				    bus_space_read_1(iot, ioh, wd_cyl_lo);
 #ifdef ATAPI_DEBUG_WDC
-				printf ("wdcintr: clearing up %d bytes\n", len);
+				printf ("wdcintr: clearing up %d bytes\n",
+				    len);
 #endif
 				wdcbit_bucket (wdc, len);
 			}
@@ -727,8 +730,8 @@ wdc_ata_intr(wdc,xfer)
 	struct wdc_softc *wdc;
 	struct wdc_xfer *xfer;
 {
-	bus_chipset_tag_t bc = wdc->sc_bc;
-	bus_io_handle_t ioh = wdc->sc_ioh;
+	bus_space_tag_t iot = wdc->sc_iot;
+	bus_space_handle_t ioh = wdc->sc_ioh;
 	struct wd_link *d_link = xfer->d_link;
 
 	if (wait_for_unbusy(wdc) < 0) {
@@ -803,10 +806,10 @@ wdc_ata_intr(wdc,xfer)
 
 		/* Pull in data. */
 		if ((d_link->sc_flags & WDF_32BIT) == 0)
-			bus_io_read_raw_multi_2(bc, ioh, wd_data,
+			bus_space_read_raw_multi_2(iot, ioh, wd_data,
 			    xfer->databuf + xfer->c_skip, xfer->c_nbytes);
 		else
-			bus_io_read_raw_multi_4(bc, ioh, wd_data,
+			bus_space_read_raw_multi_4(iot, ioh, wd_data,
 			    xfer->databuf + xfer->c_skip, xfer->c_nbytes);
 	}
     
@@ -844,16 +847,16 @@ int
 wdcreset(wdc)
 	struct wdc_softc *wdc;
 {
-	bus_chipset_tag_t bc = wdc->sc_bc;
-	bus_io_handle_t ioh = wdc->sc_ioh;
+	bus_space_tag_t iot = wdc->sc_iot;
+	bus_space_handle_t ioh = wdc->sc_ioh;
 
 	/* Reset the device. */
-	bus_io_write_1(bc, ioh, wd_ctlr, WDCTL_RST|WDCTL_IDS);
+	bus_space_write_1(iot, ioh, wd_ctlr, WDCTL_RST|WDCTL_IDS);
 	delay(1000);
-	bus_io_write_1(bc, ioh, wd_ctlr, WDCTL_IDS);
+	bus_space_write_1(iot, ioh, wd_ctlr, WDCTL_IDS);
 	delay(1000);
-	(void) bus_io_read_1(bc, ioh, wd_error);
-	bus_io_write_1(bc, ioh, wd_ctlr, WDCTL_4BIT);
+	(void) bus_space_read_1(iot, ioh, wd_error);
+	bus_space_write_1(iot, ioh, wd_ctlr, WDCTL_4BIT);
 
 	if (wait_for_unbusy(wdc) < 0) {
 		printf("%s: reset failed\n", wdc->sc_dev.dv_xname);
@@ -917,8 +920,8 @@ wdcwait(wdc, mask)
 	struct wdc_softc *wdc;
 	int mask;
 {
-	bus_chipset_tag_t bc = wdc->sc_bc;
-	bus_io_handle_t ioh = wdc->sc_ioh;
+	bus_space_tag_t iot = wdc->sc_iot;
+	bus_space_handle_t ioh = wdc->sc_ioh;
 	int timeout = 0;
 	u_char status;
 #ifdef WDCNDELAY_DEBUG
@@ -928,16 +931,17 @@ wdcwait(wdc, mask)
 	WDDEBUG_PRINT(("wdcwait\n"));
 
 	for (;;) {
-		wdc->sc_status = status = bus_io_read_1(bc, ioh, wd_status);
+		wdc->sc_status = status = bus_space_read_1(iot, ioh,
+		    wd_status);
 		/*
 		 * XXX
 		 * If a single slave ATAPI device is attached, it may
 		 * have released the bus. Select it and try again.
 		 */
 		if (status == 0xff && wdc->sc_flags & WDCF_ONESLAVE) {
-			bus_io_write_1(bc, ioh, wd_sdh,
+			bus_space_write_1(iot, ioh, wd_sdh,
 			    WDSD_IBM | 0x10);
-			wdc->sc_status = status = bus_io_read_1(bc, ioh,
+			wdc->sc_status = status = bus_space_read_1(iot, ioh,
 			    wd_status);
 		}
 		if ((status & WDCS_BSY) == 0 && (status & mask) == mask)
@@ -951,7 +955,7 @@ wdcwait(wdc, mask)
 		delay(WDCDELAY);
 	}
 	if (status & WDCS_ERR) {
-		wdc->sc_error = bus_io_read_1(bc, ioh, wd_error);
+		wdc->sc_error = bus_space_read_1(iot, ioh, wd_error);
 		return WDCS_ERR;
 	}
 #ifdef WDCNDELAY_DEBUG
@@ -1002,8 +1006,8 @@ wdccommand(d_link, command, drive, cylin, head, sector, count)
         int drive, cylin, head, sector, count;
 {
 	struct wdc_softc *wdc = (void*)d_link->wdc_softc;
-	bus_chipset_tag_t bc = wdc->sc_bc;
-	bus_io_handle_t ioh = wdc->sc_ioh;
+	bus_space_tag_t iot = wdc->sc_iot;
+	bus_space_handle_t ioh = wdc->sc_ioh;
         int stat;
 
 	WDDEBUG_PRINT(("wdccommand drive %d\n", drive));
@@ -1014,7 +1018,7 @@ wdccommand(d_link, command, drive, cylin, head, sector, count)
 #endif
 
         /* Select drive, head, and addressing mode. */
-        bus_io_write_1(bc, ioh, wd_sdh, WDSD_IBM | (drive << 4) | head);
+        bus_space_write_1(iot, ioh, wd_sdh, WDSD_IBM | (drive << 4) | head);
 
         /* Wait for it to become ready to accept a command. */
         if (command == WDCC_IDP || d_link->type == BUS)
@@ -1032,17 +1036,17 @@ wdccommand(d_link, command, drive, cylin, head, sector, count)
 
         /* Load parameters. */
         if (d_link->type == DRIVE && d_link->sc_lp->d_type == DTYPE_ST506)
-                bus_io_write_1(bc, ioh, wd_precomp,
+                bus_space_write_1(iot, ioh, wd_precomp,
 		    d_link->sc_lp->d_precompcyl / 4);
         else
-                bus_io_write_1(bc, ioh, wd_features, 0);
-        bus_io_write_1(bc, ioh, wd_cyl_lo, cylin);
-        bus_io_write_1(bc, ioh, wd_cyl_hi, cylin >> 8);
-        bus_io_write_1(bc, ioh, wd_sector, sector);
-        bus_io_write_1(bc, ioh, wd_seccnt, count);
+                bus_space_write_1(iot, ioh, wd_features, 0);
+        bus_space_write_1(iot, ioh, wd_cyl_lo, cylin);
+        bus_space_write_1(iot, ioh, wd_cyl_hi, cylin >> 8);
+        bus_space_write_1(iot, ioh, wd_sector, sector);
+        bus_space_write_1(iot, ioh, wd_seccnt, count);
 
         /* Send command. */
-        bus_io_write_1(bc, ioh, wd_command, command);
+        bus_space_write_1(iot, ioh, wd_command, command);
 
         return 0;
 }
@@ -1056,8 +1060,8 @@ wdccommandshort(wdc, drive, command)
         int drive;
         int command;
 {
-	bus_chipset_tag_t bc = wdc->sc_bc;
-	bus_io_handle_t ioh = wdc->sc_ioh;
+	bus_space_tag_t iot = wdc->sc_iot;
+	bus_space_handle_t ioh = wdc->sc_ioh;
 
 	WDDEBUG_PRINT(("wdccommandshort\n"));
 
@@ -1068,12 +1072,12 @@ wdccommandshort(wdc, drive, command)
 #endif
 
         /* Select drive. */
-        bus_io_write_1(bc, ioh, wd_sdh, WDSD_IBM|(drive << 4));
+        bus_space_write_1(iot, ioh, wd_sdh, WDSD_IBM|(drive << 4));
 
         if (wdcwait(wdc, WDCS_DRDY) < 0)
                 return -1;
 
-        bus_io_write_1(bc, ioh, wd_command, command);
+        bus_space_write_1(iot, ioh, wd_command, command);
 
 	return 0;
 }
@@ -1199,8 +1203,8 @@ wdccontrol(d_link)
 	struct wd_link *d_link;
 {
 	struct wdc_softc *wdc = (void *)d_link->wdc_softc;
-	bus_chipset_tag_t bc = wdc->sc_bc;
-	bus_io_handle_t ioh = wdc->sc_ioh;
+	bus_space_tag_t iot = wdc->sc_iot;
+	bus_space_handle_t ioh = wdc->sc_ioh;
 
 	WDDEBUG_PRINT(("wdccontrol\n"));
 
@@ -1241,7 +1245,7 @@ wdccontrol(d_link)
 	multimode:
 		if (d_link->sc_mode != WDM_PIOMULTI)
 			goto ready;
-		bus_io_write_1(bc, ioh, wd_seccnt, d_link->sc_multiple);
+		bus_space_write_1(iot, ioh, wd_seccnt, d_link->sc_multiple);
 		if (wdccommandshort(wdc, d_link->sc_drive,
 		    WDCC_SETMULTI) != 0) {
 			wderror(d_link, NULL,
@@ -1303,8 +1307,8 @@ wdc_get_parms(d_link)
 	struct wd_link *d_link;
 {
 	struct wdc_softc *wdc = (struct wdc_softc *)d_link->wdc_softc;
-	bus_chipset_tag_t bc = wdc->sc_bc;
-	bus_io_handle_t ioh = wdc->sc_ioh;
+	bus_space_tag_t iot = wdc->sc_iot;
+	bus_space_handle_t ioh = wdc->sc_ioh;
 	u_int16_t tb[DEV_BSIZE / sizeof(u_int16_t)];
 	int s, error;
 
@@ -1355,7 +1359,7 @@ wdc_get_parms(d_link)
 		d_link->sc_lp->d_type = DTYPE_ESDI;
 
 		/* Read in parameter block. */
-		bus_io_read_multi_2(bc, ioh, wd_data, tb,
+		bus_space_read_multi_2(iot, ioh, wd_data, tb,
 		    sizeof(tb) / sizeof(u_int16_t));
 		d_link->sc_params.wdp_config = (u_int16_t)tb[0];
 		d_link->sc_params.wdp_cylinders = (u_int16_t)tb[1];
@@ -1403,7 +1407,7 @@ wdc_get_parms(d_link)
 	}
 
 	/* Clear any leftover interrupt. */
-	(void) bus_io_read_1(bc, ioh, wd_status);
+	(void) bus_space_read_1(iot, ioh, wd_status);
 
 	/* Restart the queue. */
 	WDDEBUG_PRINT(("wdcstart from wdc_get_parms flags %d\n",
@@ -1435,8 +1439,8 @@ wdc_atapi_get_params(ab_link, drive, id)
 	struct atapi_identify *id;
 {
 	struct wdc_softc *wdc = (void*)ab_link->wdc_softc;
-	bus_chipset_tag_t bc = wdc->sc_bc;
-	bus_io_handle_t ioh = wdc->sc_ioh;
+	bus_space_tag_t iot = wdc->sc_iot;
+	bus_space_handle_t ioh = wdc->sc_ioh;
 	int status, len, excess = 0;
 	int s, error;
 
@@ -1510,8 +1514,8 @@ wdc_atapi_get_params(ab_link, drive, id)
 		error = 0;
 		goto end;
 	}
-	len = bus_io_read_1(bc, ioh, wd_cyl_lo) + 256 *
-	    bus_io_read_1(bc, ioh, wd_cyl_hi);
+	len = bus_space_read_1(iot, ioh, wd_cyl_lo) + 256 *
+	    bus_space_read_1(iot, ioh, wd_cyl_hi);
 	if (len != sizeof(struct atapi_identify)) {
 		if (len < 142) {	/* XXX */
 			printf("%s: drive %d returned %d/%d of identify device data, device unusuable\n", wdc->sc_dev.dv_xname, drive, len, sizeof(struct atapi_identify));
@@ -1524,7 +1528,7 @@ wdc_atapi_get_params(ab_link, drive, id)
 		if (excess < 0)
 			excess = 0;
 	}
-	bus_io_read_raw_multi_2(bc, ioh, wd_data, (u_int8_t *)id,
+	bus_space_read_raw_multi_2(iot, ioh, wd_data, (u_int8_t *)id,
 	    sizeof(struct atapi_identify));
 	wdcbit_bucket(wdc, excess);
 
@@ -1543,8 +1547,8 @@ wdc_atapi_send_command_packet(ab_link, acp)
 	struct atapi_command_packet *acp;
 {
 	struct wdc_softc *wdc = (void*)ab_link->wdc_softc;
-	bus_chipset_tag_t bc = wdc->sc_bc;
-	bus_io_handle_t ioh = wdc->sc_ioh;
+	bus_space_tag_t iot = wdc->sc_iot;
+	bus_space_handle_t ioh = wdc->sc_ioh;
 	struct wdc_xfer *xfer;
 	u_int8_t flags = acp->flags & 0xff;
 	
@@ -1590,7 +1594,7 @@ wdc_atapi_send_command_packet(ab_link, acp)
 			printf("wdc_atapi_intr: got wrong phase (0x%x)\n",
 			    phase);
 
-		bus_io_write_raw_multi_2(bc, ioh, wd_data, acp->command,
+		bus_space_write_raw_multi_2(iot, ioh, wd_data, acp->command,
 		    acp->command_size);
 
 		/* Wait for data i/o phase. */
@@ -1601,7 +1605,7 @@ wdc_atapi_send_command_packet(ab_link, acp)
 		
 		while (wdc_atapi_intr(wdc, xfer)) {
 			for (i = 2000; i > 0; --i)
-				if ((bus_io_read_1(bc, ioh, wd_status) &
+				if ((bus_space_read_1(iot, ioh, wd_status) &
 				    WDCS_DRQ) == 0)
 					break;
 #ifdef ATAPI_DEBUG_WDC
@@ -1641,17 +1645,18 @@ wdcbit_bucket(wdc, size)
 	struct wdc_softc *wdc; 
 	int size;
 {
-	bus_chipset_tag_t bc = wdc->sc_bc;
-	bus_io_handle_t ioh = wdc->sc_ioh;
+	bus_space_tag_t iot = wdc->sc_iot;
+	bus_space_handle_t ioh = wdc->sc_ioh;
 	int i;
 
 	for (i = 0 ; i < size / 2 ; i++) {
 		u_int16_t null; 
-		(void)bus_io_read_multi_2(bc, ioh, wd_data, &null, 1);
+
+		bus_space_read_multi_2(iot, ioh, wd_data, &null, 1);
 	} 
 
 	if (size % 2)
-		(void)bus_io_read_1(bc, ioh, wd_data);
+		(void)bus_space_read_1(iot, ioh, wd_data);
 }
 
 int
@@ -1659,8 +1664,8 @@ wdc_atapi_intr(wdc, xfer)
 	struct wdc_softc *wdc;
 	struct wdc_xfer *xfer;
 {
-	bus_chipset_tag_t bc = wdc->sc_bc;
-	bus_io_handle_t ioh = wdc->sc_ioh;
+	bus_space_tag_t iot = wdc->sc_iot;
+	bus_space_handle_t ioh = wdc->sc_ioh;
 	struct atapi_command_packet *acp = xfer->atapi_cmd;
 	int len, phase, i, retries = 0;
 	int err, st, ire;
@@ -1668,7 +1673,7 @@ wdc_atapi_intr(wdc, xfer)
 	if (wait_for_unbusy(wdc) < 0) {
 		printf("wdc_atapi_intr: controller busy\n");
 		acp->status = ERROR;
-		acp->error = bus_io_read_1(bc, ioh, wd_error);
+		acp->error = bus_space_read_1(iot, ioh, wd_error);
 		return 0;
 	}
 
@@ -1677,12 +1682,12 @@ wdc_atapi_intr(wdc, xfer)
 #endif
 
 again:
-	len = bus_io_read_1(bc, ioh, wd_cyl_lo) +
-	    256 * bus_io_read_1(bc, ioh, wd_cyl_hi);
+	len = bus_space_read_1(iot, ioh, wd_cyl_lo) +
+	    256 * bus_space_read_1(iot, ioh, wd_cyl_hi);
 
-	st = bus_io_read_1(bc, ioh, wd_status);
-	err = bus_io_read_1(bc, ioh, wd_error);
-	ire = bus_io_read_1(bc, ioh, wd_ireason);
+	st = bus_space_read_1(iot, ioh, wd_status);
+	err = bus_space_read_1(iot, ioh, wd_error);
+	ire = bus_space_read_1(iot, ioh, wd_ireason);
 	
 	phase = (ire & (WDCI_CMD | WDCI_IN)) | (st & WDCS_DRQ);
 #ifdef ATAPI_DEBUG_WDC
@@ -1708,7 +1713,7 @@ again:
 #endif
 
 		wdc->sc_flags |= WDCF_IRQ_WAIT;
-		bus_io_write_raw_multi_2(bc, ioh, wd_data, acp->command,
+		bus_space_write_raw_multi_2(iot, ioh, wd_data, acp->command,
 		    acp->command_size);
 		return 1;
 
@@ -1726,14 +1731,14 @@ again:
 		if (xfer->c_bcount < len) {
 			printf("wdc_atapi_intr: warning: write only "
 			    "%d of %d requested bytes\n", xfer->c_bcount, len);
-			bus_io_write_raw_multi_2(bc, ioh, wd_data,
+			bus_space_write_raw_multi_2(iot, ioh, wd_data,
 			    xfer->databuf + xfer->c_skip, xfer->c_bcount);
 			for (i = xfer->c_bcount; i < len; i += sizeof(short))
-				bus_io_write_2(bc, ioh, wd_data, 0);
+				bus_space_write_2(iot, ioh, wd_data, 0);
 			xfer->c_bcount = 0;
 			return 1;
 		} else {
-			bus_io_write_raw_multi_2(bc, ioh, wd_data,
+			bus_space_write_raw_multi_2(iot, ioh, wd_data,
 			    xfer->databuf + xfer->c_skip, len);
 			xfer->c_skip += len;
 			xfer->c_bcount -= len;
@@ -1754,14 +1759,14 @@ again:
 		if (xfer->c_bcount < len) {
 			printf("wdc_atapi_intr: warning: reading only "
 			    "%d of %d bytes\n", xfer->c_bcount, len);
-			bus_io_read_raw_multi_2(bc, ioh, wd_data,
+			bus_space_read_raw_multi_2(iot, ioh, wd_data,
 			    xfer->databuf + xfer->c_skip,
 			    xfer->c_bcount);
 			wdcbit_bucket(wdc, len - xfer->c_bcount);
 			xfer->c_bcount = 0;
 			return 1;
 		} else {
-			bus_io_read_raw_multi_2(bc, ioh, wd_data,
+			bus_space_read_raw_multi_2(iot, ioh, wd_data,
 			    xfer->databuf + xfer->c_skip, len);
 			xfer->c_skip += len;
 			xfer->c_bcount -=len;
@@ -1774,7 +1779,7 @@ again:
 		printf("PHASE_COMPLETED\n");
 #endif
 		if (st & WDCS_ERR) {
-			acp->error = bus_io_read_1(bc, ioh, wd_error);
+			acp->error = bus_space_read_1(iot, ioh, wd_error);
 			acp->status = ERROR;
 		}
 #ifdef ATAPI_DEBUG_WDC
diff --git a/sys/dev/isa/wdlink.h b/sys/dev/isa/wdlink.h
index 36945bdb5e6..66ceb721b31 100644
--- a/sys/dev/isa/wdlink.h
+++ b/sys/dev/isa/wdlink.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: wdlink.h,v 1.5 1996/11/28 08:23:40 downsj Exp $	*/
+/*	$OpenBSD: wdlink.h,v 1.6 1996/11/29 22:55:10 niklas Exp $	*/
 
 /*
  * Copyright (c) 1994, 1995 Charles M. Hannum.  All rights reserved.
@@ -48,8 +48,8 @@ struct wdc_softc {
 	struct wd_link *d_link[2];
 	struct bus_link *ab_link;
 	struct wdc_link ctlr_link;
-	bus_chipset_tag_t sc_bc;
-	bus_io_handle_t sc_ioh;
+	bus_space_tag_t sc_iot;
+	bus_space_handle_t sc_ioh;
 	int sc_drq;			/* DMA channel */
 
 	TAILQ_HEAD(xferhead, wdc_xfer) sc_xfer;
diff --git a/sys/dev/isa/wds.c b/sys/dev/isa/wds.c
index fb67adbebaf..1251f3050e5 100644
--- a/sys/dev/isa/wds.c
+++ b/sys/dev/isa/wds.c
@@ -1,8 +1,12 @@
-/*	$OpenBSD: wds.c,v 1.10 1996/11/23 21:46:49 kstailey Exp $	*/
-/*	$NetBSD: wds.c,v 1.7 1996/05/12 23:54:09 mycroft Exp $	*/
+/*	$OpenBSD: wds.c,v 1.11 1996/11/29 22:55:10 niklas Exp $	*/
+/*	$NetBSD: wds.c,v 1.13 1996/11/03 16:20:31 mycroft Exp $	*/
 
 #undef	WDSDIAG
+#ifdef DDB
 #define	integrate
+#else
+#define	integrate	static inline
+#endif
 
 /*
  * XXX
@@ -65,7 +69,7 @@
 #include <sys/proc.h>
 #include <sys/user.h>
 
-#include <machine/bus.old.h>
+#include <machine/bus.h>
 #include <machine/intr.h>
 #include <machine/pio.h>
 
@@ -108,8 +112,8 @@ struct wds_softc {
 	struct isadev sc_id;
 	void *sc_ih;
 
-	bus_chipset_tag_t sc_bc;  /* bus identifier */
-	bus_io_handle_t sc_ioh;   /* io handle */
+	bus_space_tag_t sc_iot;		/* bus identifier */
+	bus_space_handle_t sc_ioh;	/* io handle */
 	int sc_irq, sc_drq;
 
 	int sc_revision;
@@ -143,7 +147,7 @@ int wds_debug = WDSDEBUG;
 #endif
 
 integrate void    wds_wait
-    __P((bus_chipset_tag_t, bus_io_handle_t, int, int, int));
+    __P((bus_space_tag_t, bus_space_handle_t, int, int, int));
 int     wds_cmd __P((struct wds_softc *, u_char *, int));
 integrate void wds_finish_scbs __P((struct wds_softc *));
 int     wdsintr __P((void *));
@@ -167,6 +171,7 @@ void	wds_sense  __P((struct wds_softc *, struct wds_scb *));
 int	wds_poll __P((struct wds_softc *, struct scsi_xfer *, int));
 int	wds_ipoll __P((struct wds_softc *, struct wds_scb *, int));
 void	wds_timeout __P((void *));
+int	wdsprint __P((void *, const char *));
 
 struct scsi_adapter wds_switch = {
 	wds_scsi_cmd,
@@ -185,7 +190,6 @@ struct scsi_device wds_dev = {
 
 int	wdsprobe __P((struct device *, void *, void *));
 void	wdsattach __P((struct device *, struct device *, void *));
-int	wdsprint __P((void *, const char *));
 
 struct cfattach wds_ca = {
 	sizeof(struct wds_softc), wdsprobe, wdsattach
@@ -198,14 +202,14 @@ struct cfdriver wds_cd = {
 #define	WDS_ABORT_TIMEOUT	2000	/* time to wait for abort (mSec) */
 
 integrate void
-wds_wait(bc, ioh, port, mask, val)
-	bus_chipset_tag_t bc;
-	bus_io_handle_t ioh;
+wds_wait(iot, ioh, port, mask, val)
+	bus_space_tag_t iot;
+	bus_space_handle_t ioh;
 	int port;
 	int mask;
 	int val;
 {
-	while ((bus_io_read_1(bc, ioh, port) & mask) != val)
+	while ((bus_space_read_1(iot, ioh, port) & mask) != val)
 		;
 }
 
@@ -218,16 +222,16 @@ wds_cmd(sc, ibuf, icnt)
 	u_int8_t *ibuf;
 	int icnt;
 {
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_io_handle_t ioh = sc->sc_ioh;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
 	u_int8_t c;
 
-	wds_wait(bc, ioh, WDS_STAT, WDSS_RDY, WDSS_RDY);
+	wds_wait(iot, ioh, WDS_STAT, WDSS_RDY, WDSS_RDY);
 
 	while (icnt--) {
-		bus_io_write_1(bc, ioh, WDS_CMD, *ibuf++);
-		wds_wait(bc, ioh, WDS_STAT, WDSS_RDY, WDSS_RDY);
-		c = bus_io_read_1(bc, ioh, WDS_STAT);
+		bus_space_write_1(iot, ioh, WDS_CMD, *ibuf++);
+		wds_wait(iot, ioh, WDS_STAT, WDSS_RDY, WDSS_RDY);
+		c = bus_space_read_1(iot, ioh, WDS_STAT);
 		if (c & WDSS_REJ)
 			return 1;
 	}
@@ -295,6 +299,9 @@ wdsattach(parent, self, aux)
 	/*
 	 * fill in the prototype scsi_link.
 	 */
+#ifdef notyet
+	sc->sc_link.channel = SCSI_CHANNEL_ONLY_ONE;
+#endif
 	sc->sc_link.adapter_softc = sc;
 	sc->sc_link.adapter_target = sc->sc_scsi_dev;
 	sc->sc_link.adapter = &wds_switch;
@@ -385,19 +392,19 @@ wdsintr(arg)
 	void *arg;
 {
 	struct wds_softc *sc = arg;
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_io_handle_t ioh = sc->sc_ioh;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
 	u_char c;
 
 	/* Was it really an interrupt from the board? */
-	if ((bus_io_read_1(bc, ioh, WDS_STAT) & WDSS_IRQ) == 0)
+	if ((bus_space_read_1(iot, ioh, WDS_STAT) & WDSS_IRQ) == 0)
 		return 0;
 
 	/* Get the interrupt status byte. */
-	c = bus_io_read_1(bc, ioh, WDS_IRQSTAT) & WDSI_MASK;
+	c = bus_space_read_1(iot, ioh, WDS_IRQSTAT) & WDSI_MASK;
 
 	/* Acknowledge (which resets) the interrupt. */
-	bus_io_write_1(bc, ioh, WDS_IRQACK, 0x00);
+	bus_space_write_1(iot, ioh, WDS_IRQACK, 0x00);
 
 	switch (c) {
 	case WDSI_MSVC:
@@ -838,54 +845,54 @@ wds_find(ia, sc)
 	struct isa_attach_args *ia;
 	struct wds_softc *sc;
 {
-	bus_chipset_tag_t bc = ia->ia_bc;
-	bus_io_handle_t ioh;
+	bus_space_tag_t iot = ia->ia_iot;
+	bus_space_handle_t ioh;
 	u_char c;
 	int i;
 
 	/* XXXXX */
 
-	if (bus_io_map(bc, ia->ia_iobase, WDS_IO_PORTS, &ioh))
+	if (bus_space_map(iot, ia->ia_iobase, WDS_IO_PORTS, 0, &ioh))
 		return (0);
 
 	/*
 	 * Sending a command causes the CMDRDY bit to clear.
  	 */
-	c = bus_io_read_1(bc, ioh, WDS_STAT);
+	c = bus_space_read_1(iot, ioh, WDS_STAT);
 	for (i = 0; i < 4; i++)
-		if ((bus_io_read_1(bc, ioh, WDS_STAT) & WDSS_RDY) != 0) {
+		if ((bus_space_read_1(iot, ioh, WDS_STAT) & WDSS_RDY) != 0) {
 			goto ready;
 		delay(10);
 	}
 	return 1;
 
 ready:
-	bus_io_write_1(bc, ioh, WDS_CMD, WDSC_NOOP);
-	if (bus_io_read_1(bc, ioh, WDS_STAT) & WDSS_RDY)
+	bus_space_write_1(iot, ioh, WDS_CMD, WDSC_NOOP);
+	if (bus_space_read_1(iot, ioh, WDS_STAT) & WDSS_RDY)
 		return 1;
 
-	bus_io_write_1(bc, ioh, WDS_HCR, WDSH_SCSIRESET|WDSH_ASCRESET);
+	bus_space_write_1(iot, ioh, WDS_HCR, WDSH_SCSIRESET|WDSH_ASCRESET);
 	delay(10000);
-	bus_io_write_1(bc, ioh, WDS_HCR, 0x00);
+	bus_space_write_1(iot, ioh, WDS_HCR, 0x00);
 	delay(500000);
-	wds_wait(bc, ioh, WDS_STAT, WDSS_RDY, WDSS_RDY);
-	if (bus_io_read_1(bc, ioh, WDS_IRQSTAT) != 1)
-		if (bus_io_read_1(bc, ioh, WDS_IRQSTAT) != 7)
+	wds_wait(iot, ioh, WDS_STAT, WDSS_RDY, WDSS_RDY);
+	if (bus_space_read_1(iot, ioh, WDS_IRQSTAT) != 1)
+		if (bus_space_read_1(iot, ioh, WDS_IRQSTAT) != 7)
 			printf("%s: failed reset!!! %2x\n",
 			    sc ? sc->sc_dev.dv_xname : "wds?",
-			    bus_io_read_1(bc, ioh, WDS_IRQSTAT));
+			    bus_space_read_1(iot, ioh, WDS_IRQSTAT));
 
-	if ((bus_io_read_1(bc, ioh, WDS_STAT) & (WDSS_RDY)) != WDSS_RDY) {
+	if ((bus_space_read_1(iot, ioh, WDS_STAT) & (WDSS_RDY)) != WDSS_RDY) {
 		printf("%s: waiting for controller to become ready.",
 		    sc ? sc->sc_dev.dv_xname : "wds?");
 		for (i = 0; i < 20; i++) {
-			if ((bus_io_read_1(bc, ioh, WDS_STAT) & (WDSS_RDY)) ==
-			    WDSS_RDY)
+			if ((bus_space_read_1(iot, ioh, WDS_STAT) &
+			    (WDSS_RDY)) == WDSS_RDY)
 				break;
 			printf(".");
 			delay(10000);
 		}
-		if ((bus_io_read_1(bc, ioh, WDS_STAT) & (WDSS_RDY)) !=
+		if ((bus_space_read_1(iot, ioh, WDS_STAT) & (WDSS_RDY)) !=
 		    WDSS_RDY) {
 			printf(" failed\n");
 			return 1;
@@ -898,12 +905,12 @@ ready:
 		/* who are we on the scsi bus? */
 		sc->sc_scsi_dev = 7;
 
-		sc->sc_bc = bc;
+		sc->sc_iot = iot;
 		sc->sc_ioh = ioh;
 		sc->sc_irq = ia->ia_irq;
 		sc->sc_drq = ia->ia_drq;
 	} else
-		bus_io_unmap(bc, ioh, WDS_IO_PORTS);
+		bus_space_unmap(iot, ioh, WDS_IO_PORTS);
 
 	return 0;
 }
@@ -915,8 +922,8 @@ void
 wds_init(sc)
 	struct wds_softc *sc;
 {
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_io_handle_t ioh = sc->sc_ioh;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
 	struct wds_setup init;
 	u_char c;
 	int i;
@@ -960,12 +967,12 @@ wds_init(sc)
 	init.nomb = init.nimb = WDS_MBX_SIZE;
 	wds_cmd(sc, (u_char *)&init, sizeof init);
 
-	wds_wait(bc, ioh, WDS_STAT, WDSS_INIT, WDSS_INIT);
+	wds_wait(iot, ioh, WDS_STAT, WDSS_INIT, WDSS_INIT);
 
 	c = WDSC_DISUNSOL;
 	wds_cmd(sc, &c, sizeof c);
 
-	bus_io_write_1(bc, ioh, WDS_HCR, WDSH_DRQEN);
+	bus_space_write_1(iot, ioh, WDS_HCR, WDSH_DRQEN);
 }
 
 /*
@@ -992,7 +999,7 @@ wds_inquire_setup_information(sc)
 	scb->cmd.opcode = WDSX_GETFIRMREV;
 
 	/* Will poll card, await result. */
-	bus_io_write_1(sc->sc_bc, sc->sc_ioh, WDS_HCR, WDSH_DRQEN);
+	bus_space_write_1(sc->sc_iot, sc->sc_ioh, WDS_HCR, WDSH_DRQEN);
 	scb->flags |= SCB_POLLED;
 
 	s = splbio();
@@ -1021,7 +1028,6 @@ void
 wdsminphys(bp)
 	struct buf *bp;
 {
-
 	if (bp->b_bcount > ((WDS_NSEG - 1) << PGSHIFT))
 		bp->b_bcount = ((WDS_NSEG - 1) << PGSHIFT);
 	minphys(bp);
@@ -1036,8 +1042,8 @@ wds_scsi_cmd(xs)
 {
 	struct scsi_link *sc_link = xs->sc_link;
 	struct wds_softc *sc = sc_link->adapter_softc;
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_io_handle_t ioh = sc->sc_ioh;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
 	struct wds_scb *scb;
 	struct wds_scat_gath *sg;
 	int seg;
@@ -1236,11 +1242,11 @@ wds_scsi_cmd(xs)
 	/* XXX Do we really want to do this? */
 	if (flags & SCSI_POLL) {
 		/* Will poll card, await result. */
-		bus_io_write_1(bc, ioh, WDS_HCR, WDSH_DRQEN);
+		bus_space_write_1(iot, ioh, WDS_HCR, WDSH_DRQEN);
 		scb->flags |= SCB_POLLED;
 	} else {
 		/* Will send command, let interrupt routine handle result. */
-		bus_io_write_1(bc, ioh, WDS_HCR, WDSH_IRQEN | WDSH_DRQEN);
+		bus_space_write_1(iot, ioh, WDS_HCR, WDSH_IRQEN | WDSH_DRQEN);
 	}
 
 	s = splbio();
@@ -1341,8 +1347,8 @@ wds_poll(sc, xs, count)
 	struct scsi_xfer *xs;
 	int count;
 {
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_io_handle_t ioh = sc->sc_ioh;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
 
 	/* timeouts are in msec, so we loop in 1000 usec cycles */
 	while (count) {
@@ -1350,7 +1356,7 @@ wds_poll(sc, xs, count)
 		 * If we had interrupts enabled, would we
 		 * have got an interrupt?
 		 */
-		if (bus_io_read_1(bc, ioh, WDS_STAT) & WDSS_IRQ)
+		if (bus_space_read_1(iot, ioh, WDS_STAT) & WDSS_IRQ)
 			wdsintr(sc);
 		if (xs->flags & ITSDONE)
 			return 0;
@@ -1369,8 +1375,8 @@ wds_ipoll(sc, scb, count)
 	struct wds_scb *scb;
 	int count;
 {
-	bus_chipset_tag_t bc = sc->sc_bc;
-	bus_io_handle_t ioh = sc->sc_ioh;
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
 
 	/* timeouts are in msec, so we loop in 1000 usec cycles */
 	while (count) {
@@ -1378,7 +1384,7 @@ wds_ipoll(sc, scb, count)
 		 * If we had interrupts enabled, would we
 		 * have got an interrupt?
 		 */
-		if (bus_io_read_1(bc, ioh, WDS_STAT) & WDSS_IRQ)
+		if (bus_space_read_1(iot, ioh, WDS_STAT) & WDSS_IRQ)
 			wdsintr(sc);
 		if (scb->flags & SCB_DONE)
 			return 0;