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diff --git a/src/atidac.c b/src/atidac.c
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+/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/ati/atidac.c,v 1.18 2003/02/25 17:58:13 tsi Exp $ */
+/*
+ * Copyright 1997 through 2003 by Marc Aurele La France (TSI @ UQV), tsi@xfree86.org
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of Marc Aurele La France not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  Marc Aurele La France makes no representations
+ * about the suitability of this software for any purpose.  It is provided
+ * "as-is" without express or implied warranty.
+ *
+ * MARC AURELE LA FRANCE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.  IN NO
+ * EVENT SHALL MARC AURELE LA FRANCE BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "ati.h"
+#include "atidac.h"
+#include "atimach64io.h"
+#include "atimono.h"
+
+/*
+ * RAMDAC-related definitions.
+ */
+const SymTabRec ATIDACDescriptors[] =
+{   /* Keep this table in ascending DACType order */
+    {ATI_DAC_ATI68830,      "ATI 68830 or similar"},
+    {ATI_DAC_SC11483,       "Sierra 11483 or similar"},
+    {ATI_DAC_ATI68875,      "ATI 68875 or similar"},
+    {ATI_DAC_TVP3026_A,     "TI ViewPoint3026 or similar"},
+    {ATI_DAC_GENERIC,       "Brooktree 476 or similar"},
+    {ATI_DAC_BT481,         "Brooktree 481 or similar"},
+    {ATI_DAC_ATT20C491,     "AT&T 20C491 or similar"},
+    {ATI_DAC_SC15026,       "Sierra 15026 or similar"},
+    {ATI_DAC_MU9C1880,      "Music 9C1880 or similar"},
+    {ATI_DAC_IMSG174,       "Inmos G174 or similar"},
+    {ATI_DAC_ATI68860_B,    "ATI 68860 (Revision B) or similar"},
+    {ATI_DAC_ATI68860_C,    "ATI 68860 (Revision C) or similar"},
+    {ATI_DAC_TVP3026_B,     "TI ViewPoint3026 or similar"},
+    {ATI_DAC_STG1700,       "SGS-Thompson 1700 or similar"},
+    {ATI_DAC_ATT20C498,     "AT&T 20C498 or similar"},
+    {ATI_DAC_STG1702,       "SGS-Thompson 1702 or similar"},
+    {ATI_DAC_SC15021,       "Sierra 15021 or similar"},
+    {ATI_DAC_ATT21C498,     "AT&T 21C498 or similar"},
+    {ATI_DAC_STG1703,       "SGS-Thompson 1703 or similar"},
+    {ATI_DAC_CH8398,        "Chrontel 8398 or similar"},
+    {ATI_DAC_ATT20C408,     "AT&T 20C408 or similar"},
+    {ATI_DAC_INTERNAL,      "Internal"},
+    {ATI_DAC_IBMRGB514,     "IBM RGB 514 or similar"},
+    {ATI_DAC_UNKNOWN,       "Unknown"}          /* Must be last */
+};
+
+#ifndef AVOID_CPIO
+
+/*
+ * ATISetDACIOPorts --
+ *
+ * This function sets up DAC access I/O port numbers.
+ */
+void
+ATISetDACIOPorts
+(
+    ATIPtr      pATI,
+    ATICRTCType crtc
+)
+{
+    switch (crtc)
+    {
+        case ATI_CRTC_VGA:
+            pATI->CPIO_DAC_DATA = VGA_DAC_DATA;
+            pATI->CPIO_DAC_MASK = VGA_DAC_MASK;
+            pATI->CPIO_DAC_READ = VGA_DAC_READ;
+            pATI->CPIO_DAC_WRITE = VGA_DAC_WRITE;
+            pATI->CPIO_DAC_WAIT = GENS1(pATI->CPIO_VGABase);
+            break;
+
+        case ATI_CRTC_8514:
+            pATI->CPIO_DAC_DATA = IBM_DAC_DATA;
+            pATI->CPIO_DAC_MASK = IBM_DAC_MASK;
+            pATI->CPIO_DAC_READ = IBM_DAC_READ;
+            pATI->CPIO_DAC_WRITE = IBM_DAC_WRITE;
+            pATI->CPIO_DAC_WAIT = pATI->CPIO_DAC_MASK;
+            break;
+
+        case ATI_CRTC_MACH64:
+            pATI->CPIO_DAC_DATA = ATIIOPort(DAC_REGS) + 1;
+            pATI->CPIO_DAC_MASK = ATIIOPort(DAC_REGS) + 2;
+            pATI->CPIO_DAC_READ = ATIIOPort(DAC_REGS) + 3;
+            pATI->CPIO_DAC_WRITE = ATIIOPort(DAC_REGS) + 0;
+            pATI->CPIO_DAC_WAIT = pATI->CPIOBase;
+            break;
+
+        default:
+            break;
+    }
+}
+
+#endif /* AVOID_CPIO */
+
+/*
+ * ATIGetDACCmdReg --
+ *
+ * Setup to access a RAMDAC's command register.
+ */
+CARD8
+ATIGetDACCmdReg
+(
+    ATIPtr pATI
+)
+{
+
+#ifdef AVOID_CPIO
+
+    (void)in8(M64_DAC_WRITE);           /* Reset to PEL mode */
+    (void)in8(M64_DAC_MASK);
+    (void)in8(M64_DAC_MASK);
+    (void)in8(M64_DAC_MASK);
+    return in8(M64_DAC_MASK);
+
+#else /* AVOID_CPIO */
+
+    (void)inb(pATI->CPIO_DAC_WRITE);    /* Reset to PEL mode */
+    (void)inb(pATI->CPIO_DAC_MASK);
+    (void)inb(pATI->CPIO_DAC_MASK);
+    (void)inb(pATI->CPIO_DAC_MASK);
+    return inb(pATI->CPIO_DAC_MASK);
+
+#endif /* AVOID_CPIO */
+
+}
+
+/*
+ * ATIDACPreInit --
+ *
+ * This function initialises the fields in an ATIHWRec that relate to DACs.
+ */
+void
+ATIDACPreInit
+(
+    ScrnInfoPtr pScreenInfo,
+    ATIPtr      pATI,
+    ATIHWPtr    pATIHW
+)
+{
+    int Index, Index2;
+    CARD8 maxColour = (1 << pATI->rgbBits) - 1;
+
+    pATIHW->dac_read = pATIHW->dac_write = 0x00U;
+    pATIHW->dac_mask = 0xFFU;
+
+    /*
+     * Set colour lookup table.  The first entry has already been zeroed out.
+     */
+    if (pATI->depth > 8)
+        for (Index = 1;  Index < (NumberOf(pATIHW->lut) / 3);  Index++)
+        {
+            Index2 = Index * 3;
+            pATIHW->lut[Index2 + 0] =
+                pATIHW->lut[Index2 + 1] =
+                pATIHW->lut[Index2 + 2] = Index;
+        }
+    else
+    {
+        /*
+         * Initialise hardware colour map so that use of uninitialised
+         * software colour map entries can easily be seen.  For 256-colour
+         * modes, this doesn't remain effective for very long...
+         */
+        pATIHW->lut[3] = pATIHW->lut[4] = pATIHW->lut[5] = 0xFFU;
+        for (Index = 2;  Index < (NumberOf(pATIHW->lut) / 3);  Index++)
+        {
+            Index2 = Index * 3;
+            pATIHW->lut[Index2 + 0] = maxColour;
+            pATIHW->lut[Index2 + 1] = 0x00U;
+            pATIHW->lut[Index2 + 2] = maxColour;
+        }
+
+#ifndef AVOID_CPIO
+
+        if (pATI->depth == 1)
+        {
+            rgb blackColour = pScreenInfo->display->blackColour,
+                whiteColour = pScreenInfo->display->whiteColour;
+
+            if (blackColour.red > maxColour)
+                blackColour.red = maxColour;
+            if (blackColour.green > maxColour)
+                blackColour.green = maxColour;
+            if (blackColour.blue > maxColour)
+                blackColour.blue = maxColour;
+            if (whiteColour.red > maxColour)
+                whiteColour.red = maxColour;
+            if (whiteColour.green > maxColour)
+                whiteColour.green = maxColour;
+            if (whiteColour.blue > maxColour)
+                whiteColour.blue = maxColour;
+
+            if ((blackColour.red == whiteColour.red) &&
+                (blackColour.green == whiteColour.green) &&
+                (blackColour.blue == whiteColour.blue))
+            {
+                blackColour.red ^= maxColour;
+                blackColour.green ^= maxColour;
+                blackColour.blue ^= maxColour;
+            }
+
+            pATIHW->lut[(MONO_BLACK * 3) + 0] = blackColour.red;
+            pATIHW->lut[(MONO_BLACK * 3) + 1] = blackColour.green;
+            pATIHW->lut[(MONO_BLACK * 3) + 2] = blackColour.blue;
+            pATIHW->lut[(MONO_WHITE * 3) + 0] = whiteColour.red;
+            pATIHW->lut[(MONO_WHITE * 3) + 1] = whiteColour.green;
+            pATIHW->lut[(MONO_WHITE * 3) + 2] = whiteColour.blue;
+        }
+
+        if (pATIHW->crtc == ATI_CRTC_VGA)
+        {
+            /* Initialise overscan to black */
+            Index = pATIHW->attr[17] * 3;
+            pATIHW->lut[Index + 0] =
+                pATIHW->lut[Index + 1] =
+                pATIHW->lut[Index + 2] = 0x00U;
+        }
+
+#endif /* AVOID_CPIO */
+
+    }
+}
+
+/*
+ * ATIDACSave --
+ *
+ * This function is called to save the current RAMDAC state into an ATIHWRec
+ * structure occurrence.
+ */
+void
+ATIDACSave
+(
+    ATIPtr   pATI,
+    ATIHWPtr pATIHW
+)
+{
+    int Index;
+
+#ifdef AVOID_CPIO
+
+    pATIHW->dac_read = in8(M64_DAC_READ);
+    DACDelay;
+    pATIHW->dac_write = in8(M64_DAC_WRITE);
+    DACDelay;
+    pATIHW->dac_mask = in8(M64_DAC_MASK);
+    DACDelay;
+
+    /* Save DAC's colour lookup table */
+    out8(M64_DAC_MASK, 0xFFU);
+    DACDelay;
+    out8(M64_DAC_READ, 0x00U);
+    DACDelay;
+    for (Index = 0;  Index < NumberOf(pATIHW->lut);  Index++)
+    {
+        pATIHW->lut[Index] = in8(M64_DAC_DATA);
+        DACDelay;
+    }
+
+    out8(M64_DAC_MASK, pATIHW->dac_mask);
+    DACDelay;
+    out8(M64_DAC_READ, pATIHW->dac_read);
+    DACDelay;
+
+#else /* AVOID_CPIO */
+
+    ATISetDACIOPorts(pATI, pATIHW->crtc);
+
+    pATIHW->dac_read = inb(pATI->CPIO_DAC_READ);
+    DACDelay;
+    pATIHW->dac_write = inb(pATI->CPIO_DAC_WRITE);
+    DACDelay;
+    pATIHW->dac_mask = inb(pATI->CPIO_DAC_MASK);
+    DACDelay;
+
+    /* Save DAC's colour lookup table */
+    outb(pATI->CPIO_DAC_MASK, 0xFFU);
+    DACDelay;
+    outb(pATI->CPIO_DAC_READ, 0x00U);
+    DACDelay;
+    for (Index = 0;  Index < NumberOf(pATIHW->lut);  Index++)
+    {
+        pATIHW->lut[Index] = inb(pATI->CPIO_DAC_DATA);
+        DACDelay;
+    }
+
+    outb(pATI->CPIO_DAC_MASK, pATIHW->dac_mask);
+    DACDelay;
+    outb(pATI->CPIO_DAC_READ, pATIHW->dac_read);
+    DACDelay;
+
+#endif /* AVOID_CPIO */
+
+}
+
+/*
+ * ATIDACSet --
+ *
+ * This function loads RAMDAC data from an ATIHWRec structure occurrence.
+ */
+void
+ATIDACSet
+(
+    ATIPtr   pATI,
+    ATIHWPtr pATIHW
+)
+{
+    int Index;
+
+#ifdef AVOID_CPIO
+
+    /* Load DAC's colour lookup table */
+    out8(M64_DAC_MASK, 0xFFU);
+    DACDelay;
+    out8(M64_DAC_WRITE, 0x00U);
+    DACDelay;
+    for (Index = 0;  Index < NumberOf(pATIHW->lut);  Index++)
+    {
+        out8(M64_DAC_DATA, pATIHW->lut[Index]);
+        DACDelay;
+    }
+
+    out8(M64_DAC_MASK, pATIHW->dac_mask);
+    DACDelay;
+    out8(M64_DAC_READ, pATIHW->dac_read);
+    DACDelay;
+    out8(M64_DAC_WRITE, pATIHW->dac_write);
+    DACDelay;
+
+#else /* AVOID_CPIO */
+
+    ATISetDACIOPorts(pATI, pATIHW->crtc);
+
+    /* Load DAC's colour lookup table */
+    outb(pATI->CPIO_DAC_MASK, 0xFFU);
+    DACDelay;
+    outb(pATI->CPIO_DAC_WRITE, 0x00U);
+    DACDelay;
+    for (Index = 0;  Index < NumberOf(pATIHW->lut);  Index++)
+    {
+        outb(pATI->CPIO_DAC_DATA, pATIHW->lut[Index]);
+        DACDelay;
+    }
+
+    outb(pATI->CPIO_DAC_MASK, pATIHW->dac_mask);
+    DACDelay;
+    outb(pATI->CPIO_DAC_READ, pATIHW->dac_read);
+    DACDelay;
+    outb(pATI->CPIO_DAC_WRITE, pATIHW->dac_write);
+    DACDelay;
+
+#endif /* AVOID_CPIO */
+
+}
+
+/*
+ * ATILoadPalette --
+ *
+ * This function updates the RAMDAC's LUT and the in-memory copy of it in
+ * NewHW.
+ */
+void
+ATILoadPalette
+(
+    ScrnInfoPtr pScreenInfo,
+    int         nColours,
+    int         *Indices,
+    LOCO        *Colours,
+    VisualPtr   pVisual
+)
+{
+    ATIPtr pATI = ATIPTR(pScreenInfo);
+    CARD8  *LUTEntry;
+    int    i, j, Index;
+
+    if (((pVisual->class | DynamicClass) == DirectColor) &&
+        ((1 << pVisual->nplanes) > (SizeOf(pATI->NewHW.lut) / 3)))
+    {
+        int reds = pVisual->redMask >> pVisual->offsetRed;
+        int greens = pVisual->greenMask >> pVisual->offsetGreen;
+        int blues = pVisual->blueMask >> pVisual->offsetBlue;
+
+        int redShift = 8 - pATI->weight.red;
+        int greenShift = 8 - pATI->weight.green;
+        int blueShift = 8 - pATI->weight.blue;
+
+        int redMult = 3 << redShift;
+        int greenMult = 3 << greenShift;
+        int blueMult = 3 << blueShift;
+
+        int minShift;
+
+        CARD8 fChanged[SizeOf(pATI->NewHW.lut) / 3];
+
+        (void)memset(fChanged, SizeOf(fChanged), 0);
+
+        minShift = redShift;
+        if (minShift > greenShift)
+            minShift = greenShift;
+        if (minShift > blueShift)
+            minShift = blueShift;
+
+        for (i = 0;  i < nColours;  i++)
+        {
+            if((Index = Indices[i]) < 0)
+                continue;
+
+            if (Index <= reds)
+            {
+                j = Index * redMult;
+                pATI->NewHW.lut[j + 0] = Colours[Index].red;
+                fChanged[j / 3] = TRUE;
+            }
+            if (Index <= greens)
+            {
+                j = Index * greenMult;
+                pATI->NewHW.lut[j + 1] = Colours[Index].green;
+                fChanged[j / 3] = TRUE;
+            }
+            if (Index <= blues)
+            {
+                j = Index * blueMult;
+                pATI->NewHW.lut[j + 2] = Colours[Index].blue;
+                fChanged[j / 3] = TRUE;
+            }
+        }
+
+        if (pScreenInfo->vtSema || pATI->currentMode)
+        {
+            /* Rewrite LUT entries that could have been changed */
+            i = 1 << minShift;
+            LUTEntry = pATI->NewHW.lut;
+
+            for (Index = 0;
+                 Index < (SizeOf(pATI->NewHW.lut) / 3);
+                 Index += i, LUTEntry += i * 3)
+            {
+                if (!fChanged[Index])
+                    continue;
+
+#ifdef AVOID_CPIO
+
+                out8(M64_DAC_WRITE, Index);
+                DACDelay;
+                out8(M64_DAC_DATA, LUTEntry[0]);
+                DACDelay;
+                out8(M64_DAC_DATA, LUTEntry[1]);
+                DACDelay;
+                out8(M64_DAC_DATA, LUTEntry[2]);
+                DACDelay;
+
+#else /* AVOID_CPIO */
+
+                outb(pATI->CPIO_DAC_WRITE, Index);
+                DACDelay;
+                outb(pATI->CPIO_DAC_DATA, LUTEntry[0]);
+                DACDelay;
+                outb(pATI->CPIO_DAC_DATA, LUTEntry[1]);
+                DACDelay;
+                outb(pATI->CPIO_DAC_DATA, LUTEntry[2]);
+                DACDelay;
+
+#endif /* AVOID_CPIO */
+
+            }
+        }
+    }
+    else
+    {
+        for (i = 0;  i < nColours;  i++)
+        {
+            Index = Indices[i];
+            if ((Index < 0) || (Index >= (SizeOf(pATI->NewHW.lut) / 3)))
+                continue;
+
+            LUTEntry = &pATI->NewHW.lut[Index * 3];
+            LUTEntry[0] = Colours[Index].red;
+            LUTEntry[1] = Colours[Index].green;
+            LUTEntry[2] = Colours[Index].blue;
+
+            if (pScreenInfo->vtSema || pATI->currentMode)
+            {
+
+#ifdef AVOID_CPIO
+
+                out8(M64_DAC_WRITE, Index);
+                DACDelay;
+                out8(M64_DAC_DATA, LUTEntry[0]);
+                DACDelay;
+                out8(M64_DAC_DATA, LUTEntry[1]);
+                DACDelay;
+                out8(M64_DAC_DATA, LUTEntry[2]);
+                DACDelay;
+
+#else /* AVOID_CPIO */
+
+                outb(pATI->CPIO_DAC_WRITE, Index);
+                DACDelay;
+                outb(pATI->CPIO_DAC_DATA, LUTEntry[0]);
+                DACDelay;
+                outb(pATI->CPIO_DAC_DATA, LUTEntry[1]);
+                DACDelay;
+                outb(pATI->CPIO_DAC_DATA, LUTEntry[2]);
+                DACDelay;
+
+#endif /* AVOID_CPIO */
+
+            }
+        }
+    }
+}