From NetBSD: merge of 960317

1 files changed, 15 insertions, 82 deletions

diff --git a/share/man/man4/man4.vax/tu.4 b/share/man/man4/man4.vax/tu.4
index c5bd721187f..51e5bbccb4a 100644
--- a/share/man/man4/man4.vax/tu.4
+++ b/share/man/man4/man4.vax/tu.4
@@ -1,3 +1,6 @@
+.\"	$OpenBSD: tu.4,v 1.2 1996/03/29 10:17:31 niklas Exp $
+.\"	$NetBSD: tu.4,v 1.4 1996/03/03 17:14:09 thorpej Exp $
+.\"
 .\" Copyright (c) 1980, 1991 Regents of the University of California.
 .\" All rights reserved.
 .\"
@@ -30,7 +33,6 @@
 .\" SUCH DAMAGE.
 .\"
 .\"     from: @(#)tu.4	6.2 (Berkeley) 3/27/91
-.\"	$Id: tu.4,v 1.1 1995/10/18 08:44:36 deraadt Exp $
 .\"
 .Dd March 27, 1991
 .Dt TU 4 vax
@@ -38,27 +40,17 @@
 .Sh NAME
 .Nm tu
 .Nd
-.Tn VAX-11/730
-and
 .Tn VAX-11/750
 .Tn TU58
 console cassette interface
-.Sh SYNOPSIS
-.Cd "options MRSP"
-(for
-.Tn VAX-11/750 Ns 's
-with an
-.Tn MRSP
-prom)
 .Sh DESCRIPTION
 The
 .Nm tu
 interface provides access to the
 .Tn VAX
-11/730 and 11/750
+11/750
 .Tn TU58
-console
-cassette drive(s).  
+console cassette drive.  
 .Pp
 The interface supports only block
 .Tn I/O
@@ -66,11 +58,11 @@ to the
 .Tn TU58
 cassettes.
 The devices are normally manipulated with the 
-.Xr arff 8
-program using the ``f'' and ``m'' options.
+.Xr dd 1
+program.
 .Pp
 The device driver is automatically included when a
-system is configured to run on an 11/730 or 11/750.
+system is configured to run on an 11/750.
 .Pp
 The
 .Tn TU58
@@ -78,89 +70,30 @@ on an 11/750 uses the Radial Serial Protocol
 .Pq Tn RSP
 to communicate with the cpu over a serial line.  This 
 protocol is inherently unreliable as it has no flow
-control measures built in.  On an 11/730 the Modified
-Radial Serial Protocol is used.  This protocol incorporates
-flow control measures which insure reliable data transfer
-between the cpu and the device.  Certain 11/750's have
-been modified to use the
-.Tn MRSP
-prom used in the 11/730.
-To reliably use the console
-.Tn TU58
-on an 11/750 under
-.Tn UNIX ,
-the
-.Tn MRSP
-prom is required.  For those 11/750's without
-an
-.Tn MRSP
-prom, an unreliable but often
-useable interface has been developed.
-This interface uses an assembly language ``pseudo-dma'' routine
-to minimize the receiver interrupt service latency.
-To include this code in
-the system, the configuration must
-.Em not
-specify the
-system will run on an 11/730 or use an
-.Tn MRSP
-prom.
-This unfortunately makes it impossible to configure a
-single system which will properly handle
-.Tn TU58 Ns 's
-on both an 11/750
-and an 11/730 (unless both machines have
-.Tn MRSP
-proms).
+control measures built in.
 .Sh FILES
 .Bl -tag -width /dev/tu0xx -compact
 .It Pa /dev/tu0
-.It Pa /dev/tu1
-(only on a
-.Tn VAX Ns \-11/730)
 .El
 .Sh DIAGNOSTICS
 .Bl -diag
-.It tu%d: no bp, active %d.
-A transmission complete interrupt was received with no outstanding
-.Tn I/O
-request.  This indicates a hardware problem.
-.Pp
-.It "tu%d protocol error, state=%s, op=%x, cnt=%d, block=%d."
-The driver entered an illegal state.  The information printed
-indicates the illegal state, operation currently being executed,
-the
-.Tn I/O
-count, and the block number on the cassette.
-.Pp
-.It "tu%d receive state error, state=%s, byte=%x."
-The driver entered an illegal state in the receiver finite
-state machine.  The state is shown along with the control
-byte of the received packet.
-.Pp
-.It tu%d: read stalled.
+.It tu%d: lost recv interrupt.
+.br
 A timer watching the controller detected no interrupt for
 an extended period while an operation was outstanding.
 This usually indicates that one or more receiver interrupts
-were lost and the transfer is restarted (11/750 only).
-.Pp
-.It tu%d: hard error bn%d, pk_mod %o.
-The device returned a status code indicating a hard error. The
-actual error code is shown in octal. No retries are attempted
-by the driver.
+were lost and the transfer is restarted.
 .El
-.Sh SEE ALSO
-.Xr arff 8
 .Sh HISTORY
 The
 .Nm
 driver appeared in
 .Bx 4.1 .
+.br
+A new driver showed up in NetBSD 1.1A.
 .Sh BUGS
 The
 .Tn VAX Ns \-11/750
-console interface without
-.Tn MRSP
-prom is unuseable
+console interface is unuseable
 while the system is multi-user; it should be used only with
 the system running single-user and, even then, with caution.