Initial revision

4 files changed, 2577 insertions, 0 deletions

diff --git a/hw/xfree86/vgahw/vgaCmap.c b/hw/xfree86/vgahw/vgaCmap.c
new file mode 100644
index 000000000..a70f572b5
--- /dev/null
+++ b/hw/xfree86/vgahw/vgaCmap.c
@@ -0,0 +1,301 @@
+/* $XFree86: xc/programs/Xserver/hw/xfree86/vgahw/vgaCmap.c,v 1.7 2001/02/15 18:31:22 eich Exp $ */
+/*
+ * Copyright 1990,91 by Thomas Roell, Dinkelscherben, Germany.
+ *
+ * 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 Thomas Roell not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission.  Thomas Roell makes no representations
+ * about the suitability of this software for any purpose.  It is provided
+ * "as is" without express or implied warranty.
+ *
+ * THOMAS ROELL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THOMAS ROELL 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.
+ *
+ */
+/* $XConsortium: vgaCmap.c /main/15 1996/10/28 05:13:44 kaleb $ */
+
+
+#include "X.h"
+#include "Xproto.h"
+#include "windowstr.h"
+#include "compiler.h"
+#include "mipointer.h"
+#include "micmap.h"
+
+#include "xf86.h"
+#include "vgaHW.h"
+#include "xf86_ansic.h"
+
+#define _XF86DGA_SERVER_
+#include "extensions/xf86dgastr.h"
+#include "dgaproc.h"
+
+
+#define NOMAPYET        (ColormapPtr) 0
+
+int
+vgaListInstalledColormaps(pScreen, pmaps)
+     ScreenPtr	pScreen;
+     Colormap	*pmaps;
+{
+  /* By the time we are processing requests, we can guarantee that there
+   * is always a colormap installed */
+  
+  *pmaps = miInstalledMaps[pScreen->myNum]->mid;
+  return(1);
+}
+
+int
+vgaGetInstalledColormaps(pScreen, pmaps)
+     ScreenPtr		pScreen;
+     ColormapPtr	*pmaps;
+{
+  /* By the time we are processing requests, we can guarantee that there
+   * is always a colormap installed */
+  
+  *pmaps = miInstalledMaps[pScreen->myNum];
+  return(1);
+}
+
+int vgaCheckColorMap(ColormapPtr pmap)
+{
+  return (pmap != miInstalledMaps[pmap->pScreen->myNum]);
+}
+
+
+void
+vgaStoreColors(pmap, ndef, pdefs)
+     ColormapPtr	pmap;
+     int		ndef;
+     xColorItem	        *pdefs;
+{
+    int		i;
+    unsigned char *cmap, *tmp = NULL;
+    xColorItem	directDefs[256];
+    Bool          new_overscan = FALSE;
+    Bool	writeColormap;
+
+    /* This can get called before the ScrnInfoRec is installed so we
+       can't rely on getting it with XF86SCRNINFO() */
+    int scrnIndex = pmap->pScreen->myNum;
+    ScrnInfoPtr scrninfp = xf86Screens[scrnIndex];
+    vgaHWPtr hwp = VGAHWPTR(scrninfp);
+    
+    unsigned char overscan = hwp->ModeReg.Attribute[OVERSCAN];
+    unsigned char tmp_overscan = 0;
+
+    if (vgaCheckColorMap(pmap))
+        return;
+
+    if ((pmap->pVisual->class | DynamicClass) == DirectColor)
+    {
+        ndef = miExpandDirectColors (pmap, ndef, pdefs, directDefs);
+        pdefs = directDefs;
+    }
+    
+    writeColormap = scrninfp->vtSema;
+    if (DGAAvailable(scrnIndex))
+    {
+	writeColormap = writeColormap ||
+			(DGAGetDirectMode(scrnIndex) &&
+			 !(DGAGetFlags(scrnIndex) & XF86DGADirectColormap)) ||
+			(DGAGetFlags(scrnIndex) & XF86DGAHasColormap);
+    }
+
+    if (writeColormap)
+	hwp->enablePalette(hwp);
+
+    for(i = 0; i < ndef; i++)
+    {
+        if (pdefs[i].pixel == overscan)
+	{
+	    new_overscan = TRUE;
+	}
+        cmap = &(hwp->ModeReg.DAC[pdefs[i].pixel*3]);
+	if (scrninfp->rgbBits == 8) {
+            cmap[0] = pdefs[i].red   >> 8;
+            cmap[1] = pdefs[i].green >> 8;
+            cmap[2] = pdefs[i].blue  >> 8;
+        }
+        else {
+            cmap[0] = pdefs[i].red   >> 10;
+            cmap[1] = pdefs[i].green >> 10;
+            cmap[2] = pdefs[i].blue  >> 10;
+        }
+#if 0
+	if (clgd6225Lcd)
+	{
+		/* The LCD doesn't like white */
+		if (cmap[0] == 63) cmap[0]= 62;
+		if (cmap[1] == 63) cmap[1]= 62;
+		if (cmap[2] == 63) cmap[2]= 62;
+	}
+#endif
+
+        if (writeColormap)
+	{
+	    if (hwp->ShowOverscan && i == 255)
+		continue;
+	    hwp->writeDacWriteAddr(hwp, pdefs[i].pixel);
+	    DACDelay(hwp);
+	    hwp->writeDacData(hwp, cmap[0]);
+	    DACDelay(hwp);
+	    hwp->writeDacData(hwp, cmap[1]);
+	    DACDelay(hwp);
+	    hwp->writeDacData(hwp, cmap[2]);
+	    DACDelay(hwp);
+	}
+    }
+    if (new_overscan && !hwp->ShowOverscan)
+    {
+	new_overscan = FALSE;
+        for(i = 0; i < ndef; i++)
+        {
+            if (pdefs[i].pixel == overscan)
+	    {
+	        if ((pdefs[i].red != 0) || 
+	            (pdefs[i].green != 0) || 
+	            (pdefs[i].blue != 0))
+	        {
+	            new_overscan = TRUE;
+		    tmp_overscan = overscan;
+        	    tmp = &(hwp->ModeReg.DAC[pdefs[i].pixel*3]);
+	        }
+	        break;
+	    }
+        }
+        if (new_overscan)
+        {
+            /*
+             * Find a black pixel, or the nearest match.
+             */
+            for (i=255; i >= 0; i--)
+	    {
+                cmap = &(hwp->ModeReg.DAC[i*3]);
+	        if ((cmap[0] == 0) && (cmap[1] == 0) && (cmap[2] == 0))
+	        {
+	            overscan = i;
+	            break;
+	        }
+	        else
+	        {
+	            if ((cmap[0] < tmp[0]) && 
+		        (cmap[1] < tmp[1]) && (cmap[2] < tmp[2]))
+	            {
+		        tmp = cmap;
+		        tmp_overscan = i;
+	            }
+	        }
+	    }
+	    if (i < 0)
+	    {
+	        overscan = tmp_overscan;
+	    }
+	    hwp->ModeReg.Attribute[OVERSCAN] = overscan;
+            if (writeColormap)
+	    {
+	      hwp->writeAttr(hwp, OVERSCAN, overscan);
+	    }
+        }
+    }
+
+    if (writeColormap)
+	hwp->disablePalette(hwp);
+}
+
+
+void
+vgaInstallColormap(pmap)
+     ColormapPtr	pmap;
+{
+  ColormapPtr oldmap = miInstalledMaps[pmap->pScreen->myNum];
+  int         entries;
+  Pixel *     ppix;
+  xrgb *      prgb;
+  xColorItem *defs;
+  int         i;
+
+
+  if (pmap == oldmap)
+    return;
+
+  if ((pmap->pVisual->class | DynamicClass) == DirectColor)
+    entries = (pmap->pVisual->redMask |
+	       pmap->pVisual->greenMask |
+	       pmap->pVisual->blueMask) + 1;
+  else
+    entries = pmap->pVisual->ColormapEntries;
+
+  ppix = (Pixel *)ALLOCATE_LOCAL( entries * sizeof(Pixel));
+  prgb = (xrgb *)ALLOCATE_LOCAL( entries * sizeof(xrgb));
+  defs = (xColorItem *)ALLOCATE_LOCAL(entries * sizeof(xColorItem));
+
+  if ( oldmap != NOMAPYET)
+    WalkTree( pmap->pScreen, TellLostMap, &oldmap->mid);
+
+  miInstalledMaps[pmap->pScreen->myNum] = pmap;
+
+  for ( i=0; i<entries; i++) ppix[i] = i;
+
+  QueryColors( pmap, entries, ppix, prgb);
+
+  for ( i=0; i<entries; i++) /* convert xrgbs to xColorItems */
+    {
+      defs[i].pixel = ppix[i];
+      defs[i].red = prgb[i].red;
+      defs[i].green = prgb[i].green;
+      defs[i].blue = prgb[i].blue;
+      defs[i].flags =  DoRed|DoGreen|DoBlue;
+    }
+  pmap->pScreen->StoreColors(pmap, entries, defs);
+
+  WalkTree(pmap->pScreen, TellGainedMap, &pmap->mid);
+  
+  DEALLOCATE_LOCAL(ppix);
+  DEALLOCATE_LOCAL(prgb);
+  DEALLOCATE_LOCAL(defs);
+}
+
+
+void
+vgaUninstallColormap(pmap)
+     ColormapPtr pmap;
+{
+
+  ColormapPtr defColormap;
+  
+  if ( pmap != miInstalledMaps[pmap->pScreen->myNum] )
+    return;
+
+  defColormap = (ColormapPtr) LookupIDByType( pmap->pScreen->defColormap,
+					      RT_COLORMAP);
+
+  if (defColormap == miInstalledMaps[pmap->pScreen->myNum])
+    return;
+
+  (*pmap->pScreen->InstallColormap) (defColormap);
+}
+
+
+void
+vgaHandleColormaps(ScreenPtr pScreen, ScrnInfoPtr scrnp)
+{
+  if (scrnp->bitsPerPixel > 1) {
+     if (scrnp->bitsPerPixel <= 8) { /* For 8bpp SVGA and VGA16 */
+        pScreen->InstallColormap = vgaInstallColormap;
+        pScreen->UninstallColormap = vgaUninstallColormap;
+        pScreen->ListInstalledColormaps = vgaListInstalledColormaps;
+        pScreen->StoreColors = vgaStoreColors;
+    }
+  }
+}
+
diff --git a/hw/xfree86/vgahw/vgaHW.c b/hw/xfree86/vgahw/vgaHW.c
new file mode 100644
index 000000000..e598d91a2
--- /dev/null
+++ b/hw/xfree86/vgahw/vgaHW.c
@@ -0,0 +1,2021 @@
+/* $XFree86: xc/programs/Xserver/hw/xfree86/vgahw/vgaHW.c,v 1.57 2003/02/24 21:29:36 tsi Exp $ */
+
+/*
+ *
+ * Copyright 1991-1999 by The XFree86 Project, Inc.
+ *
+ * Loosely based on code bearing the following copyright:
+ *
+ *   Copyright 1990,91 by Thomas Roell, Dinkelscherben, Germany.
+ *
+ */
+
+#define _NEED_SYSI86
+
+#include "X.h"
+#include "misc.h"
+
+#include "xf86.h"
+#include "xf86_OSproc.h"
+#include "xf86_ansic.h"
+#include "vgaHW.h"
+
+#include "compiler.h"
+
+#include "xf86cmap.h"
+
+#ifndef SAVE_FONT1
+#define SAVE_FONT1
+#endif
+
+/*
+ * These used to be OS-specific, which made this module have an undesirable
+ * OS dependency.  Define them by default for all platforms.
+ */
+#ifndef NEED_SAVED_CMAP
+#define NEED_SAVED_CMAP
+#endif
+#ifndef SAVE_TEXT
+#define SAVE_TEXT
+#endif
+#ifndef SAVE_FONT2
+#define SAVE_FONT2
+#endif
+
+/* bytes per plane to save for text */
+#define TEXT_AMOUNT 16384
+
+/* bytes per plane to save for font data */
+#define FONT_AMOUNT (8*8192)
+
+#if 0
+/* Override all of these for now */
+#undef SAVE_FONT1
+#define SAVE_FONT1
+#undef SAVE_FONT2
+#define SAVE_FONT2
+#undef SAVE_TEST
+#define SAVE_TEST
+#undef FONT_AMOUNT
+#define FONT_AMOUNT 65536
+#undef TEXT_AMOUNT
+#define TEXT_AMOUNT 65536
+#endif
+
+/* DAC indices for white and black */
+#define WHITE_VALUE 0x3F
+#define BLACK_VALUE 0x00
+#define OVERSCAN_VALUE 0x01
+
+
+/* Use a private definition of this here */
+#undef VGAHWPTR
+#define VGAHWPTRLVAL(p) (p)->privates[vgaHWPrivateIndex].ptr
+#define VGAHWPTR(p) ((vgaHWPtr)(VGAHWPTRLVAL(p)))
+
+static int vgaHWPrivateIndex = -1;
+
+#define DAC_TEST_MASK 0x3F
+
+#ifdef NEED_SAVED_CMAP
+/* This default colourmap is used only when it can't be read from the VGA */
+
+static CARD8 defaultDAC[768] =
+{
+     0,  0,  0,    0,  0, 42,    0, 42,  0,    0, 42, 42,
+    42,  0,  0,   42,  0, 42,   42, 21,  0,   42, 42, 42,
+    21, 21, 21,   21, 21, 63,   21, 63, 21,   21, 63, 63,
+    63, 21, 21,   63, 21, 63,   63, 63, 21,   63, 63, 63,
+     0,  0,  0,    5,  5,  5,    8,  8,  8,   11, 11, 11,
+    14, 14, 14,   17, 17, 17,   20, 20, 20,   24, 24, 24,
+    28, 28, 28,   32, 32, 32,   36, 36, 36,   40, 40, 40,
+    45, 45, 45,   50, 50, 50,   56, 56, 56,   63, 63, 63,
+     0,  0, 63,   16,  0, 63,   31,  0, 63,   47,  0, 63,
+    63,  0, 63,   63,  0, 47,   63,  0, 31,   63,  0, 16,
+    63,  0,  0,   63, 16,  0,   63, 31,  0,   63, 47,  0,
+    63, 63,  0,   47, 63,  0,   31, 63,  0,   16, 63,  0,
+     0, 63,  0,    0, 63, 16,    0, 63, 31,    0, 63, 47,
+     0, 63, 63,    0, 47, 63,    0, 31, 63,    0, 16, 63,
+    31, 31, 63,   39, 31, 63,   47, 31, 63,   55, 31, 63,
+    63, 31, 63,   63, 31, 55,   63, 31, 47,   63, 31, 39,
+    63, 31, 31,   63, 39, 31,   63, 47, 31,   63, 55, 31,
+    63, 63, 31,   55, 63, 31,   47, 63, 31,   39, 63, 31,
+    31, 63, 31,   31, 63, 39,   31, 63, 47,   31, 63, 55,
+    31, 63, 63,   31, 55, 63,   31, 47, 63,   31, 39, 63,
+    45, 45, 63,   49, 45, 63,   54, 45, 63,   58, 45, 63,
+    63, 45, 63,   63, 45, 58,   63, 45, 54,   63, 45, 49,
+    63, 45, 45,   63, 49, 45,   63, 54, 45,   63, 58, 45,
+    63, 63, 45,   58, 63, 45,   54, 63, 45,   49, 63, 45,
+    45, 63, 45,   45, 63, 49,   45, 63, 54,   45, 63, 58,
+    45, 63, 63,   45, 58, 63,   45, 54, 63,   45, 49, 63,
+     0,  0, 28,    7,  0, 28,   14,  0, 28,   21,  0, 28,
+    28,  0, 28,   28,  0, 21,   28,  0, 14,   28,  0,  7,
+    28,  0,  0,   28,  7,  0,   28, 14,  0,   28, 21,  0,
+    28, 28,  0,   21, 28,  0,   14, 28,  0,    7, 28,  0,
+     0, 28,  0,    0, 28,  7,    0, 28, 14,    0, 28, 21,
+     0, 28, 28,    0, 21, 28,    0, 14, 28,    0,  7, 28,
+    14, 14, 28,   17, 14, 28,   21, 14, 28,   24, 14, 28,
+    28, 14, 28,   28, 14, 24,   28, 14, 21,   28, 14, 17,
+    28, 14, 14,   28, 17, 14,   28, 21, 14,   28, 24, 14,
+    28, 28, 14,   24, 28, 14,   21, 28, 14,   17, 28, 14,
+    14, 28, 14,   14, 28, 17,   14, 28, 21,   14, 28, 24,
+    14, 28, 28,   14, 24, 28,   14, 21, 28,   14, 17, 28,
+    20, 20, 28,   22, 20, 28,   24, 20, 28,   26, 20, 28,
+    28, 20, 28,   28, 20, 26,   28, 20, 24,   28, 20, 22,
+    28, 20, 20,   28, 22, 20,   28, 24, 20,   28, 26, 20,
+    28, 28, 20,   26, 28, 20,   24, 28, 20,   22, 28, 20,
+    20, 28, 20,   20, 28, 22,   20, 28, 24,   20, 28, 26,
+    20, 28, 28,   20, 26, 28,   20, 24, 28,   20, 22, 28,
+     0,  0, 16,    4,  0, 16,    8,  0, 16,   12,  0, 16,
+    16,  0, 16,   16,  0, 12,   16,  0,  8,   16,  0,  4,
+    16,  0,  0,   16,  4,  0,   16,  8,  0,   16, 12,  0,
+    16, 16,  0,   12, 16,  0,    8, 16,  0,    4, 16,  0,
+     0, 16,  0,    0, 16,  4,    0, 16,  8,    0, 16, 12,
+     0, 16, 16,    0, 12, 16,    0,  8, 16,    0,  4, 16,
+     8,  8, 16,   10,  8, 16,   12,  8, 16,   14,  8, 16,
+    16,  8, 16,   16,  8, 14,   16,  8, 12,   16,  8, 10,
+    16,  8,  8,   16, 10,  8,   16, 12,  8,   16, 14,  8,
+    16, 16,  8,   14, 16,  8,   12, 16,  8,   10, 16,  8,
+     8, 16,  8,    8, 16, 10,    8, 16, 12,    8, 16, 14,
+     8, 16, 16,    8, 14, 16,    8, 12, 16,    8, 10, 16,
+    11, 11, 16,   12, 11, 16,   13, 11, 16,   15, 11, 16,
+    16, 11, 16,   16, 11, 15,   16, 11, 13,   16, 11, 12,
+    16, 11, 11,   16, 12, 11,   16, 13, 11,   16, 15, 11,
+    16, 16, 11,   15, 16, 11,   13, 16, 11,   12, 16, 11,
+    11, 16, 11,   11, 16, 12,   11, 16, 13,   11, 16, 15,
+    11, 16, 16,   11, 15, 16,   11, 13, 16,   11, 12, 16,
+     0,  0,  0,    0,  0,  0,    0,  0,  0,    0,  0,  0,
+     0,  0,  0,    0,  0,  0,    0,  0,  0,    0,  0,  0,
+};
+#endif /* NEED_SAVED_CMAP */
+
+/*
+ * Standard VGA versions of the register access functions.
+ */
+static void
+stdWriteCrtc(vgaHWPtr hwp, CARD8 index, CARD8 value)
+{
+    outb(hwp->IOBase + hwp->PIOOffset + VGA_CRTC_INDEX_OFFSET, index);
+    outb(hwp->IOBase + hwp->PIOOffset + VGA_CRTC_DATA_OFFSET, value);
+}
+
+static CARD8
+stdReadCrtc(vgaHWPtr hwp, CARD8 index)
+{
+    outb(hwp->IOBase + hwp->PIOOffset + VGA_CRTC_INDEX_OFFSET, index);
+    return inb(hwp->IOBase + hwp->PIOOffset + VGA_CRTC_DATA_OFFSET);
+}
+
+static void
+stdWriteGr(vgaHWPtr hwp, CARD8 index, CARD8 value)
+{
+    outb(hwp->PIOOffset + VGA_GRAPH_INDEX, index);
+    outb(hwp->PIOOffset + VGA_GRAPH_DATA, value);
+}
+
+static CARD8
+stdReadGr(vgaHWPtr hwp, CARD8 index)
+{
+    outb(hwp->PIOOffset + VGA_GRAPH_INDEX, index);
+    return inb(hwp->PIOOffset + VGA_GRAPH_DATA);
+}
+
+static void
+stdWriteSeq(vgaHWPtr hwp, CARD8 index, CARD8 value)
+{
+    outb(hwp->PIOOffset + VGA_SEQ_INDEX, index);
+    outb(hwp->PIOOffset + VGA_SEQ_DATA, value);
+}
+
+static CARD8
+stdReadSeq(vgaHWPtr hwp, CARD8 index)
+{
+    outb(hwp->PIOOffset + VGA_SEQ_INDEX, index);
+    return inb(hwp->PIOOffset + VGA_SEQ_DATA);
+}
+
+static CARD8
+stdReadST00(vgaHWPtr hwp)
+{
+    return inb(hwp->PIOOffset + VGA_IN_STAT_0);
+}
+
+static CARD8
+stdReadST01(vgaHWPtr hwp)
+{
+    return inb(hwp->IOBase + hwp->PIOOffset + VGA_IN_STAT_1_OFFSET);
+}
+
+static CARD8
+stdReadFCR(vgaHWPtr hwp)
+{
+    return inb(hwp->PIOOffset + VGA_FEATURE_R);
+}
+
+static void
+stdWriteFCR(vgaHWPtr hwp, CARD8 value)
+{
+    outb(hwp->IOBase + hwp->PIOOffset + VGA_FEATURE_W_OFFSET,value);
+}
+
+static void
+stdWriteAttr(vgaHWPtr hwp, CARD8 index, CARD8 value)
+{
+    CARD8 tmp;
+
+    if (hwp->paletteEnabled)
+	index &= ~0x20;
+    else
+	index |= 0x20;
+
+    tmp = inb(hwp->IOBase + hwp->PIOOffset + VGA_IN_STAT_1_OFFSET);
+    outb(hwp->PIOOffset + VGA_ATTR_INDEX, index);
+    outb(hwp->PIOOffset + VGA_ATTR_DATA_W, value);
+}
+
+static CARD8
+stdReadAttr(vgaHWPtr hwp, CARD8 index)
+{
+    CARD8 tmp;
+
+    if (hwp->paletteEnabled)
+	index &= ~0x20;
+    else
+	index |= 0x20;
+
+    tmp = inb(hwp->IOBase + hwp->PIOOffset + VGA_IN_STAT_1_OFFSET);
+    outb(hwp->PIOOffset + VGA_ATTR_INDEX, index);
+    return inb(hwp->PIOOffset + VGA_ATTR_DATA_R);
+}
+
+static void
+stdWriteMiscOut(vgaHWPtr hwp, CARD8 value)
+{
+    outb(hwp->PIOOffset + VGA_MISC_OUT_W, value);
+}
+
+static CARD8
+stdReadMiscOut(vgaHWPtr hwp)
+{
+    return inb(hwp->PIOOffset + VGA_MISC_OUT_R);
+}
+
+static void
+stdEnablePalette(vgaHWPtr hwp)
+{
+    CARD8 tmp;
+
+    tmp = inb(hwp->IOBase + hwp->PIOOffset + VGA_IN_STAT_1_OFFSET);
+    outb(hwp->PIOOffset + VGA_ATTR_INDEX, 0x00);
+    hwp->paletteEnabled = TRUE;
+}
+
+static void
+stdDisablePalette(vgaHWPtr hwp)
+{
+    CARD8 tmp;
+
+    tmp = inb(hwp->IOBase + hwp->PIOOffset + VGA_IN_STAT_1_OFFSET);
+    outb(hwp->PIOOffset + VGA_ATTR_INDEX, 0x20);
+    hwp->paletteEnabled = FALSE;
+}
+
+static void
+stdWriteDacMask(vgaHWPtr hwp, CARD8 value)
+{
+    outb(hwp->PIOOffset + VGA_DAC_MASK, value);
+}
+
+static CARD8
+stdReadDacMask(vgaHWPtr hwp)
+{
+    return inb(hwp->PIOOffset + VGA_DAC_MASK);
+}
+
+static void
+stdWriteDacReadAddr(vgaHWPtr hwp, CARD8 value)
+{
+    outb(hwp->PIOOffset + VGA_DAC_READ_ADDR, value);
+}
+
+static void
+stdWriteDacWriteAddr(vgaHWPtr hwp, CARD8 value)
+{
+    outb(hwp->PIOOffset + VGA_DAC_WRITE_ADDR, value);
+}
+
+static void
+stdWriteDacData(vgaHWPtr hwp, CARD8 value)
+{
+    outb(hwp->PIOOffset + VGA_DAC_DATA, value);
+}
+
+static CARD8
+stdReadDacData(vgaHWPtr hwp)
+{
+    return inb(hwp->PIOOffset + VGA_DAC_DATA);
+}
+
+static CARD8
+stdReadEnable(vgaHWPtr hwp)
+{
+    return inb(hwp->PIOOffset + VGA_ENABLE);
+}
+
+static void
+stdWriteEnable(vgaHWPtr hwp, CARD8 value)
+{
+    outb(hwp->PIOOffset + VGA_ENABLE, value);
+}
+
+void
+vgaHWSetStdFuncs(vgaHWPtr hwp)
+{
+    hwp->writeCrtc		= stdWriteCrtc;
+    hwp->readCrtc		= stdReadCrtc;
+    hwp->writeGr		= stdWriteGr;
+    hwp->readGr			= stdReadGr;
+    hwp->readST00               = stdReadST00;
+    hwp->readST01               = stdReadST01;
+    hwp->readFCR                = stdReadFCR;
+    hwp->writeFCR               = stdWriteFCR;
+    hwp->writeAttr		= stdWriteAttr;
+    hwp->readAttr		= stdReadAttr;
+    hwp->writeSeq		= stdWriteSeq;
+    hwp->readSeq		= stdReadSeq;
+    hwp->writeMiscOut		= stdWriteMiscOut;
+    hwp->readMiscOut		= stdReadMiscOut;
+    hwp->enablePalette		= stdEnablePalette;
+    hwp->disablePalette		= stdDisablePalette;
+    hwp->writeDacMask		= stdWriteDacMask;
+    hwp->readDacMask		= stdReadDacMask;
+    hwp->writeDacWriteAddr	= stdWriteDacWriteAddr;
+    hwp->writeDacReadAddr	= stdWriteDacReadAddr;
+    hwp->writeDacData		= stdWriteDacData;
+    hwp->readDacData		= stdReadDacData;
+    hwp->PIOOffset		= 0;
+    hwp->readEnable		= stdReadEnable;
+    hwp->writeEnable		= stdWriteEnable;
+}
+
+/*
+ * MMIO versions of the register access functions.  These require
+ * hwp->MemBase to be set in such a way that when the standard VGA port
+ * adderss is added the correct memory address results.
+ */
+
+#define minb(p) MMIO_IN8(hwp->MMIOBase, (hwp->MMIOOffset + (p)))
+#define moutb(p,v) MMIO_OUT8(hwp->MMIOBase, (hwp->MMIOOffset + (p)),(v))
+
+static void
+mmioWriteCrtc(vgaHWPtr hwp, CARD8 index, CARD8 value)
+{
+    moutb(hwp->IOBase + VGA_CRTC_INDEX_OFFSET, index);
+    moutb(hwp->IOBase + VGA_CRTC_DATA_OFFSET, value);
+}
+
+static CARD8
+mmioReadCrtc(vgaHWPtr hwp, CARD8 index)
+{
+    moutb(hwp->IOBase + VGA_CRTC_INDEX_OFFSET, index);
+    return minb(hwp->IOBase + VGA_CRTC_DATA_OFFSET);
+}
+
+static void
+mmioWriteGr(vgaHWPtr hwp, CARD8 index, CARD8 value)
+{
+    moutb(VGA_GRAPH_INDEX, index);
+    moutb(VGA_GRAPH_DATA, value);
+}
+
+static CARD8
+mmioReadGr(vgaHWPtr hwp, CARD8 index)
+{
+    moutb(VGA_GRAPH_INDEX, index);
+    return minb(VGA_GRAPH_DATA);
+}
+
+static void
+mmioWriteSeq(vgaHWPtr hwp, CARD8 index, CARD8 value)
+{
+    moutb(VGA_SEQ_INDEX, index);
+    moutb(VGA_SEQ_DATA, value);
+}
+
+static CARD8
+mmioReadSeq(vgaHWPtr hwp, CARD8 index)
+{
+    moutb(VGA_SEQ_INDEX, index);
+    return minb(VGA_SEQ_DATA);
+}
+
+static CARD8
+mmioReadST00(vgaHWPtr hwp)
+{
+    return minb(VGA_IN_STAT_0);
+}
+
+static CARD8
+mmioReadST01(vgaHWPtr hwp)
+{
+    return minb(hwp->IOBase + VGA_IN_STAT_1_OFFSET);
+}
+
+static CARD8
+mmioReadFCR(vgaHWPtr hwp)
+{
+    return minb(VGA_FEATURE_R);
+}
+
+static void
+mmioWriteFCR(vgaHWPtr hwp, CARD8 value)
+{
+    moutb(hwp->IOBase + VGA_FEATURE_W_OFFSET,value);
+}
+
+static void
+mmioWriteAttr(vgaHWPtr hwp, CARD8 index, CARD8 value)
+{
+    CARD8 tmp;
+
+    if (hwp->paletteEnabled)
+	index &= ~0x20;
+    else
+	index |= 0x20;
+
+    tmp = minb(hwp->IOBase + VGA_IN_STAT_1_OFFSET);
+    moutb(VGA_ATTR_INDEX, index);
+    moutb(VGA_ATTR_DATA_W, value);
+}
+
+static CARD8
+mmioReadAttr(vgaHWPtr hwp, CARD8 index)
+{
+    CARD8 tmp;
+
+    if (hwp->paletteEnabled)
+	index &= ~0x20;
+    else
+	index |= 0x20;
+
+    tmp = minb(hwp->IOBase + VGA_IN_STAT_1_OFFSET);
+    moutb(VGA_ATTR_INDEX, index);
+    return minb(VGA_ATTR_DATA_R);
+}
+
+static void
+mmioWriteMiscOut(vgaHWPtr hwp, CARD8 value)
+{
+    moutb(VGA_MISC_OUT_W, value);
+}
+
+static CARD8
+mmioReadMiscOut(vgaHWPtr hwp)
+{
+    return minb(VGA_MISC_OUT_R);
+}
+
+static void
+mmioEnablePalette(vgaHWPtr hwp)
+{
+    CARD8 tmp;
+
+    tmp = minb(hwp->IOBase + VGA_IN_STAT_1_OFFSET);
+    moutb(VGA_ATTR_INDEX, 0x00);
+    hwp->paletteEnabled = TRUE;
+}
+
+static void
+mmioDisablePalette(vgaHWPtr hwp)
+{
+    CARD8 tmp;
+
+    tmp = minb(hwp->IOBase + VGA_IN_STAT_1_OFFSET);
+    moutb(VGA_ATTR_INDEX, 0x20);
+    hwp->paletteEnabled = FALSE;
+}
+
+static void
+mmioWriteDacMask(vgaHWPtr hwp, CARD8 value)
+{
+    moutb(VGA_DAC_MASK, value);
+}
+
+static CARD8
+mmioReadDacMask(vgaHWPtr hwp)
+{
+    return minb(VGA_DAC_MASK);
+}
+
+static void
+mmioWriteDacReadAddr(vgaHWPtr hwp, CARD8 value)
+{
+    moutb(VGA_DAC_READ_ADDR, value);
+}
+
+static void
+mmioWriteDacWriteAddr(vgaHWPtr hwp, CARD8 value)
+{
+    moutb(VGA_DAC_WRITE_ADDR, value);
+}
+
+static void
+mmioWriteDacData(vgaHWPtr hwp, CARD8 value)
+{
+    moutb(VGA_DAC_DATA, value);
+}
+
+static CARD8
+mmioReadDacData(vgaHWPtr hwp)
+{
+    return minb(VGA_DAC_DATA);
+}
+
+static CARD8
+mmioReadEnable(vgaHWPtr hwp)
+{
+    return minb(VGA_ENABLE);
+}
+
+static void
+mmioWriteEnable(vgaHWPtr hwp, CARD8 value)
+{
+    moutb(VGA_ENABLE, value);
+}
+
+void
+vgaHWSetMmioFuncs(vgaHWPtr hwp, CARD8 *base, int offset)
+{
+    hwp->writeCrtc		= mmioWriteCrtc;
+    hwp->readCrtc		= mmioReadCrtc;
+    hwp->writeGr		= mmioWriteGr;
+    hwp->readGr			= mmioReadGr;
+    hwp->readST00               = mmioReadST00;
+    hwp->readST01               = mmioReadST01;
+    hwp->readFCR                = mmioReadFCR;
+    hwp->writeFCR               = mmioWriteFCR;
+    hwp->writeAttr		= mmioWriteAttr;
+    hwp->readAttr		= mmioReadAttr;
+    hwp->writeSeq		= mmioWriteSeq;
+    hwp->readSeq		= mmioReadSeq;
+    hwp->writeMiscOut		= mmioWriteMiscOut;
+    hwp->readMiscOut		= mmioReadMiscOut;
+    hwp->enablePalette		= mmioEnablePalette;
+    hwp->disablePalette		= mmioDisablePalette;
+    hwp->writeDacMask		= mmioWriteDacMask;
+    hwp->readDacMask		= mmioReadDacMask;
+    hwp->writeDacWriteAddr	= mmioWriteDacWriteAddr;
+    hwp->writeDacReadAddr	= mmioWriteDacReadAddr;
+    hwp->writeDacData		= mmioWriteDacData;
+    hwp->readDacData		= mmioReadDacData;
+    hwp->MMIOBase		= base;
+    hwp->MMIOOffset		= offset;
+    hwp->readEnable		= mmioReadEnable;
+    hwp->writeEnable		= mmioWriteEnable;
+}
+
+/*
+ * vgaHWProtect --
+ *	Protect VGA registers and memory from corruption during loads.
+ */
+
+void
+vgaHWProtect(ScrnInfoPtr pScrn, Bool on)
+{
+  vgaHWPtr hwp = VGAHWPTR(pScrn);
+  
+  unsigned char tmp;
+  
+  if (pScrn->vtSema) {
+    if (on) {
+      /*
+       * Turn off screen and disable sequencer.
+       */
+      tmp = hwp->readSeq(hwp, 0x01);
+
+      vgaHWSeqReset(hwp, TRUE);			/* start synchronous reset */
+      hwp->writeSeq(hwp, 0x01, tmp | 0x20);	/* disable the display */
+
+      hwp->enablePalette(hwp);
+    } else {
+      /*
+       * Reenable sequencer, then turn on screen.
+       */
+  
+      tmp = hwp->readSeq(hwp, 0x01);
+
+      hwp->writeSeq(hwp, 0x01, tmp & ~0x20);	/* reenable display */
+      vgaHWSeqReset(hwp, FALSE);		/* clear synchronousreset */
+
+      hwp->disablePalette(hwp);
+    }
+  }
+}
+
+
+/*
+ * vgaHWBlankScreen -- blank the screen.
+ */
+
+void
+vgaHWBlankScreen(ScrnInfoPtr pScrn, Bool on)
+{
+  vgaHWPtr hwp = VGAHWPTR(pScrn);
+  unsigned char scrn;
+
+  scrn = hwp->readSeq(hwp, 0x01);
+
+  if (on) {
+    scrn &= ~0x20;			/* enable screen */
+  } else {
+    scrn |= 0x20;			/* blank screen */
+  }
+
+  vgaHWSeqReset(hwp, TRUE);
+  hwp->writeSeq(hwp, 0x01, scrn);	/* change mode */
+  vgaHWSeqReset(hwp, FALSE);
+}
+
+
+/*
+ * vgaHWSaveScreen -- blank the screen.
+ */
+
+Bool
+vgaHWSaveScreen(ScreenPtr pScreen, int mode)
+{
+   ScrnInfoPtr pScrn = NULL;
+   Bool on;
+
+   if (pScreen != NULL)
+      pScrn = xf86Screens[pScreen->myNum];
+
+   on = xf86IsUnblank(mode);
+
+#if 0
+   if (on)
+      SetTimeSinceLastInputEvent();
+#endif
+
+   if ((pScrn != NULL) && pScrn->vtSema) {
+     vgaHWBlankScreen(pScrn, on);
+   }
+   return (TRUE);
+}
+
+
+/*
+ * vgaHWDPMSSet -- Sets VESA Display Power Management Signaling (DPMS) Mode
+ *
+ * This generic VGA function can only set the Off and On modes.  If the
+ * Standby and Suspend modes are to be supported, a chip specific replacement
+ * for this function must be written.
+ */
+
+void
+vgaHWDPMSSet(ScrnInfoPtr pScrn, int PowerManagementMode, int flags)
+{
+  unsigned char seq1 = 0, crtc17 = 0;
+  vgaHWPtr hwp = VGAHWPTR(pScrn);
+
+  if (!pScrn->vtSema) return;
+
+  switch (PowerManagementMode) {
+  case DPMSModeOn:
+    /* Screen: On; HSync: On, VSync: On */
+    seq1 = 0x00;
+    crtc17 = 0x80;
+    break;
+  case DPMSModeStandby:
+    /* Screen: Off; HSync: Off, VSync: On -- Not Supported */
+    seq1 = 0x20;
+    crtc17 = 0x80;
+    break;
+  case DPMSModeSuspend:
+    /* Screen: Off; HSync: On, VSync: Off -- Not Supported */
+    seq1 = 0x20;
+    crtc17 = 0x80;
+    break;
+  case DPMSModeOff:
+    /* Screen: Off; HSync: Off, VSync: Off */
+    seq1 = 0x20;
+    crtc17 = 0x00;
+    break;
+  }
+  hwp->writeSeq(hwp, 0x00, 0x01);		/* Synchronous Reset */
+  seq1 |= hwp->readSeq(hwp, 0x01) & ~0x20;
+  hwp->writeSeq(hwp, 0x01, seq1);
+  crtc17 |= hwp->readCrtc(hwp, 0x17) & ~0x80;
+  usleep(10000);
+  hwp->writeCrtc(hwp, 0x17, crtc17);
+  hwp->writeSeq(hwp, 0x00, 0x03);		/* End Reset */
+}
+
+
+/*
+ * vgaHWSeqReset
+ *      perform a sequencer reset.
+ */
+
+void
+vgaHWSeqReset(vgaHWPtr hwp, Bool start)
+{
+  if (start)
+    hwp->writeSeq(hwp, 0x00, 0x01);		/* Synchronous Reset */
+  else
+    hwp->writeSeq(hwp, 0x00, 0x03);		/* End Reset */
+}
+
+
+void
+vgaHWRestoreFonts(ScrnInfoPtr scrninfp, vgaRegPtr restore)
+{
+    vgaHWPtr hwp = VGAHWPTR(scrninfp);
+    int savedIOBase;
+    unsigned char miscOut, attr10, gr1, gr3, gr4, gr5, gr6, gr8, seq2, seq4;
+    Bool doMap = FALSE;
+
+#if defined(SAVE_TEXT) || defined(SAVE_FONT1) || defined(SAVE_FONT2)
+
+    /* If nothing to do, return now */
+    if (!hwp->FontInfo1 && !hwp->FontInfo2 && !hwp->TextInfo)
+	return;
+
+    if (hwp->Base == NULL) {
+	doMap = TRUE;
+	if (!vgaHWMapMem(scrninfp)) {
+	    xf86DrvMsg(scrninfp->scrnIndex, X_ERROR,
+		       "vgaHWRestoreFonts: vgaHWMapMem() failed\n");
+	    return;
+	}
+    }
+
+    /* save the registers that are needed here */
+    miscOut = hwp->readMiscOut(hwp);
+    attr10 = hwp->readAttr(hwp, 0x10);
+    gr1 = hwp->readGr(hwp, 0x01);
+    gr3 = hwp->readGr(hwp, 0x03);
+    gr4 = hwp->readGr(hwp, 0x04);
+    gr5 = hwp->readGr(hwp, 0x05);
+    gr6 = hwp->readGr(hwp, 0x06);
+    gr8 = hwp->readGr(hwp, 0x08);
+    seq2 = hwp->readSeq(hwp, 0x02);
+    seq4 = hwp->readSeq(hwp, 0x04);
+
+    /* save hwp->IOBase and temporarily set it for colour mode */
+    savedIOBase = hwp->IOBase;
+    hwp->IOBase = VGA_IOBASE_COLOR;
+
+    /* Force into colour mode */
+    hwp->writeMiscOut(hwp, miscOut | 0x01);
+
+    vgaHWBlankScreen(scrninfp, FALSE);
+
+    /*
+     * here we temporarily switch to 16 colour planar mode, to simply
+     * copy the font-info and saved text.
+     *
+     * BUG ALERT: The (S)VGA's segment-select register MUST be set correctly!
+     */
+#if 0
+    hwp->writeAttr(hwp, 0x10, 0x01);	/* graphics mode */
+#endif
+    if (scrninfp->depth == 4) {
+	/* GJA */
+	hwp->writeGr(hwp, 0x03, 0x00);	/* don't rotate, write unmodified */
+	hwp->writeGr(hwp, 0x08, 0xFF);	/* write all bits in a byte */
+	hwp->writeGr(hwp, 0x01, 0x00);	/* all planes come from CPU */
+    }
+
+#ifdef SAVE_FONT1
+    if (hwp->FontInfo1) {
+	hwp->writeSeq(hwp, 0x02, 0x04);	/* write to plane 2 */
+	hwp->writeSeq(hwp, 0x04, 0x06);	/* enable plane graphics */
+	hwp->writeGr(hwp, 0x04, 0x02);	/* read plane 2 */
+	hwp->writeGr(hwp, 0x05, 0x00);	/* write mode 0, read mode 0 */
+	hwp->writeGr(hwp, 0x06, 0x05);	/* set graphics */
+	slowbcopy_tobus(hwp->FontInfo1, hwp->Base, FONT_AMOUNT);
+    }
+#endif
+
+#ifdef SAVE_FONT2
+    if (hwp->FontInfo2) {
+	hwp->writeSeq(hwp, 0x02, 0x08);	/* write to plane 3 */
+	hwp->writeSeq(hwp, 0x04, 0x06);	/* enable plane graphics */
+	hwp->writeGr(hwp, 0x04, 0x03);	/* read plane 3 */
+	hwp->writeGr(hwp, 0x05, 0x00);	/* write mode 0, read mode 0 */
+	hwp->writeGr(hwp, 0x06, 0x05);	/* set graphics */
+	slowbcopy_tobus(hwp->FontInfo2, hwp->Base, FONT_AMOUNT);
+    }
+#endif
+
+#ifdef SAVE_TEXT
+    if (hwp->TextInfo) {
+	hwp->writeSeq(hwp, 0x02, 0x01);	/* write to plane 0 */
+	hwp->writeSeq(hwp, 0x04, 0x06);	/* enable plane graphics */
+	hwp->writeGr(hwp, 0x04, 0x00);	/* read plane 0 */
+	hwp->writeGr(hwp, 0x05, 0x00);	/* write mode 0, read mode 0 */
+	hwp->writeGr(hwp, 0x06, 0x05);	/* set graphics */
+	slowbcopy_tobus(hwp->TextInfo, hwp->Base, TEXT_AMOUNT);
+	hwp->writeSeq(hwp, 0x02, 0x02);	/* write to plane 1 */
+	hwp->writeSeq(hwp, 0x04, 0x06);	/* enable plane graphics */
+	hwp->writeGr(hwp, 0x04, 0x01);	/* read plane 1 */
+	hwp->writeGr(hwp, 0x05, 0x00);	/* write mode 0, read mode 0 */
+	hwp->writeGr(hwp, 0x06, 0x05);	/* set graphics */
+	slowbcopy_tobus((unsigned char *)hwp->TextInfo + TEXT_AMOUNT,
+			hwp->Base, TEXT_AMOUNT);
+    }
+#endif
+
+    vgaHWBlankScreen(scrninfp, TRUE);
+
+    /* restore the registers that were changed */
+    hwp->writeMiscOut(hwp, miscOut);
+    hwp->writeAttr(hwp, 0x10, attr10);
+    hwp->writeGr(hwp, 0x01, gr1);
+    hwp->writeGr(hwp, 0x03, gr3);
+    hwp->writeGr(hwp, 0x04, gr4);
+    hwp->writeGr(hwp, 0x05, gr5);
+    hwp->writeGr(hwp, 0x06, gr6);
+    hwp->writeGr(hwp, 0x08, gr8);
+    hwp->writeSeq(hwp, 0x02, seq2);
+    hwp->writeSeq(hwp, 0x04, seq4);
+    hwp->IOBase = savedIOBase;
+
+    if (doMap)
+	vgaHWUnmapMem(scrninfp);
+
+#endif /* defined(SAVE_TEXT) || defined(SAVE_FONT1) || defined(SAVE_FONT2) */
+}
+
+
+void
+vgaHWRestoreMode(ScrnInfoPtr scrninfp, vgaRegPtr restore)
+{
+    vgaHWPtr hwp = VGAHWPTR(scrninfp);
+    int i;
+
+    if (restore->MiscOutReg & 0x01)
+	hwp->IOBase = VGA_IOBASE_COLOR;
+    else
+	hwp->IOBase = VGA_IOBASE_MONO;
+
+    hwp->writeMiscOut(hwp, restore->MiscOutReg);
+
+    for (i = 1; i < restore->numSequencer; i++)
+	hwp->writeSeq(hwp, i, restore->Sequencer[i]);
+  
+    /* Ensure CRTC registers 0-7 are unlocked by clearing bit 7 or CRTC[17] */
+
+    hwp->writeCrtc(hwp, 17, restore->CRTC[17] & ~0x80);
+
+    for (i = 0; i < restore->numCRTC; i++)
+	hwp->writeCrtc(hwp, i, restore->CRTC[i]);
+
+    for (i = 0; i < restore->numGraphics; i++)
+	hwp->writeGr(hwp, i, restore->Graphics[i]);
+
+    hwp->enablePalette(hwp);
+    for (i = 0; i < restore->numAttribute; i++)
+	hwp->writeAttr(hwp, i, restore->Attribute[i]);
+    hwp->disablePalette(hwp);
+}
+
+
+void
+vgaHWRestoreColormap(ScrnInfoPtr scrninfp, vgaRegPtr restore)
+{
+    vgaHWPtr hwp = VGAHWPTR(scrninfp);
+    int i;
+
+#if 0
+    hwp->enablePalette(hwp);
+#endif
+
+    hwp->writeDacMask(hwp, 0xFF);
+    hwp->writeDacWriteAddr(hwp, 0x00);
+    for (i = 0; i < 768; i++) {
+	hwp->writeDacData(hwp, restore->DAC[i]);
+	DACDelay(hwp);
+    }
+
+    hwp->disablePalette(hwp);
+}
+
+
+/*
+ * vgaHWRestore --
+ *      restore the VGA state
+ */
+
+void
+vgaHWRestore(ScrnInfoPtr scrninfp, vgaRegPtr restore, int flags)
+{
+    if (flags & VGA_SR_MODE)
+	vgaHWRestoreMode(scrninfp, restore);
+
+    if (flags & VGA_SR_FONTS)
+	vgaHWRestoreFonts(scrninfp, restore);
+
+    if (flags & VGA_SR_CMAP)
+	vgaHWRestoreColormap(scrninfp, restore);
+}
+
+void
+vgaHWSaveFonts(ScrnInfoPtr scrninfp, vgaRegPtr save)
+{
+    vgaHWPtr hwp = VGAHWPTR(scrninfp);
+    int savedIOBase;
+    unsigned char miscOut, attr10, gr4, gr5, gr6, seq2, seq4;
+    Bool doMap = FALSE;
+
+#if defined(SAVE_TEXT) || defined(SAVE_FONT1) || defined(SAVE_FONT2)
+
+    if (hwp->Base == NULL) {
+	doMap = TRUE;
+	if (!vgaHWMapMem(scrninfp)) {
+	    xf86DrvMsg(scrninfp->scrnIndex, X_ERROR,
+		       "vgaHWSaveFonts: vgaHWMapMem() failed\n");
+	    return;
+	}
+    }
+
+    /* If in graphics mode, don't save anything */
+    attr10 = hwp->readAttr(hwp, 0x10);
+    if (attr10 & 0x01)
+	return;
+
+    /* save the registers that are needed here */
+    miscOut = hwp->readMiscOut(hwp);
+    gr4 = hwp->readGr(hwp, 0x04);
+    gr5 = hwp->readGr(hwp, 0x05);
+    gr6 = hwp->readGr(hwp, 0x06);
+    seq2 = hwp->readSeq(hwp, 0x02);
+    seq4 = hwp->readSeq(hwp, 0x04);
+
+    /* save hwp->IOBase and temporarily set it for colour mode */
+    savedIOBase = hwp->IOBase;
+    hwp->IOBase = VGA_IOBASE_COLOR;
+
+    /* Force into colour mode */
+    hwp->writeMiscOut(hwp, miscOut | 0x01);
+
+    vgaHWBlankScreen(scrninfp, FALSE);
+  
+    /*
+     * get the character sets, and text screen if required
+     */
+    /*
+     * Here we temporarily switch to 16 colour planar mode, to simply
+     * copy the font-info
+     *
+     * BUG ALERT: The (S)VGA's segment-select register MUST be set correctly!
+     */
+#if 0
+    hwp->writeAttr(hwp, 0x10, 0x01);	/* graphics mode */
+#endif
+#ifdef SAVE_FONT1
+    if (hwp->FontInfo1 || (hwp->FontInfo1 = xalloc(FONT_AMOUNT))) {
+	hwp->writeSeq(hwp, 0x02, 0x04);	/* write to plane 2 */
+	hwp->writeSeq(hwp, 0x04, 0x06);	/* enable plane graphics */
+	hwp->writeGr(hwp, 0x04, 0x02);	/* read plane 2 */
+	hwp->writeGr(hwp, 0x05, 0x00);	/* write mode 0, read mode 0 */
+	hwp->writeGr(hwp, 0x06, 0x05);	/* set graphics */
+	slowbcopy_frombus(hwp->Base, hwp->FontInfo1, FONT_AMOUNT);
+    }
+#endif /* SAVE_FONT1 */
+#ifdef SAVE_FONT2
+    if (hwp->FontInfo2 || (hwp->FontInfo2 = xalloc(FONT_AMOUNT))) {
+	hwp->writeSeq(hwp, 0x02, 0x08);	/* write to plane 3 */
+	hwp->writeSeq(hwp, 0x04, 0x06);	/* enable plane graphics */
+	hwp->writeGr(hwp, 0x04, 0x03);	/* read plane 3 */
+	hwp->writeGr(hwp, 0x05, 0x00);	/* write mode 0, read mode 0 */
+	hwp->writeGr(hwp, 0x06, 0x05);	/* set graphics */
+	slowbcopy_frombus(hwp->Base, hwp->FontInfo2, FONT_AMOUNT);
+    }
+#endif /* SAVE_FONT2 */
+#ifdef SAVE_TEXT
+    if (hwp->TextInfo || (hwp->TextInfo = xalloc(2 * TEXT_AMOUNT))) {
+	hwp->writeSeq(hwp, 0x02, 0x01);	/* write to plane 0 */
+	hwp->writeSeq(hwp, 0x04, 0x06);	/* enable plane graphics */
+	hwp->writeGr(hwp, 0x04, 0x00);	/* read plane 0 */
+	hwp->writeGr(hwp, 0x05, 0x00);	/* write mode 0, read mode 0 */
+	hwp->writeGr(hwp, 0x06, 0x05);	/* set graphics */
+	slowbcopy_frombus(hwp->Base, hwp->TextInfo, TEXT_AMOUNT);
+	hwp->writeSeq(hwp, 0x02, 0x02);	/* write to plane 1 */
+	hwp->writeSeq(hwp, 0x04, 0x06);	/* enable plane graphics */
+	hwp->writeGr(hwp, 0x04, 0x01);	/* read plane 1 */
+	hwp->writeGr(hwp, 0x05, 0x00);	/* write mode 0, read mode 0 */
+	hwp->writeGr(hwp, 0x06, 0x05);	/* set graphics */
+	slowbcopy_frombus(hwp->Base,
+		(unsigned char *)hwp->TextInfo + TEXT_AMOUNT, TEXT_AMOUNT);
+    }
+#endif /* SAVE_TEXT */
+
+    /* Restore clobbered registers */
+    hwp->writeAttr(hwp, 0x10, attr10);
+    hwp->writeSeq(hwp, 0x02, seq2);
+    hwp->writeSeq(hwp, 0x04, seq4);
+    hwp->writeGr(hwp, 0x04, gr4);
+    hwp->writeGr(hwp, 0x05, gr5);
+    hwp->writeGr(hwp, 0x06, gr6);
+    hwp->writeMiscOut(hwp, miscOut);
+    hwp->IOBase = savedIOBase;
+
+    vgaHWBlankScreen(scrninfp, TRUE);
+
+    if (doMap)
+	vgaHWUnmapMem(scrninfp);
+
+#endif /* defined(SAVE_TEXT) || defined(SAVE_FONT1) || defined(SAVE_FONT2) */
+}
+
+void
+vgaHWSaveMode(ScrnInfoPtr scrninfp, vgaRegPtr save)
+{
+    vgaHWPtr hwp = VGAHWPTR(scrninfp);
+    int i;
+
+    save->MiscOutReg = hwp->readMiscOut(hwp);
+    if (save->MiscOutReg & 0x01)
+	hwp->IOBase = VGA_IOBASE_COLOR;
+    else
+	hwp->IOBase = VGA_IOBASE_MONO;
+
+    for (i = 0; i < save->numCRTC; i++) {
+	save->CRTC[i] = hwp->readCrtc(hwp, i);
+#ifdef DEBUG
+	ErrorF("CRTC[0x%02x] = 0x%02x\n", i, save->CRTC[i]);
+#endif
+    }
+
+    hwp->enablePalette(hwp);
+    for (i = 0; i < save->numAttribute; i++) {
+	save->Attribute[i] = hwp->readAttr(hwp, i);
+#ifdef DEBUG
+	ErrorF("Attribute[0x%02x] = 0x%02x\n", i, save->Attribute[i]);
+#endif
+    }
+    hwp->disablePalette(hwp);
+
+    for (i = 0; i < save->numGraphics; i++) {
+	save->Graphics[i] = hwp->readGr(hwp, i);
+#ifdef DEBUG
+	ErrorF("Graphics[0x%02x] = 0x%02x\n", i, save->Graphics[i]);
+#endif
+    }
+
+    for (i = 1; i < save->numSequencer; i++) {
+	save->Sequencer[i] = hwp->readSeq(hwp, i);
+#ifdef DEBUG
+	ErrorF("Sequencer[0x%02x] = 0x%02x\n", i, save->Sequencer[i]);
+#endif
+    }
+}
+
+
+void
+vgaHWSaveColormap(ScrnInfoPtr scrninfp, vgaRegPtr save)
+{
+    vgaHWPtr hwp = VGAHWPTR(scrninfp);
+    Bool readError = FALSE;
+    int i;
+
+#ifdef NEED_SAVED_CMAP
+    /*
+     * Some ET4000 chips from 1991 have a HW bug that prevents the reading
+     * of the color lookup table.  Mask rev 9042EAI is known to have this bug.
+     *
+     * If the colourmap is not readable, we set the saved map to a default
+     * map (taken from Ferraro's "Programmer's Guide to the EGA and VGA
+     * Cards" 2nd ed).
+     */
+
+    /* Only save it once */
+    if (hwp->cmapSaved)
+	return;
+
+#if 0
+    hwp->enablePalette(hwp);
+#endif
+
+    hwp->writeDacMask(hwp, 0xFF);
+
+    /*
+     * check if we can read the lookup table
+     */
+    hwp->writeDacReadAddr(hwp, 0x00);
+    for (i = 0; i < 6; i++) {
+	save->DAC[i] = hwp->readDacData(hwp);
+#ifdef DEBUG
+	switch (i % 3) {
+	case 0:
+	    ErrorF("DAC[0x%02x] = 0x%02x, ", i / 3, save->DAC[i]);
+	    break;
+	case 1:
+	    ErrorF("0x%02x, ", save->DAC[i]);
+	    break;
+	case 2:
+	    ErrorF("0x%02x\n", save->DAC[i]);
+	}
+#endif
+    }
+
+    /*
+     * Check if we can read the palette -
+     * use foreground color to prevent flashing.
+     */
+    hwp->writeDacWriteAddr(hwp, 0x01);
+    for (i = 3; i < 6; i++)
+	hwp->writeDacData(hwp, ~save->DAC[i] & DAC_TEST_MASK);
+    hwp->writeDacReadAddr(hwp, 0x01);
+    for (i = 3; i < 6; i++) {
+	if (hwp->readDacData(hwp) != (~save->DAC[i] & DAC_TEST_MASK))
+	    readError = TRUE;
+    }
+    hwp->writeDacWriteAddr(hwp, 0x01);
+    for (i = 3; i < 6; i++)
+	hwp->writeDacData(hwp, save->DAC[i]);
+
+    if (readError) {
+	/*			 
+	 * save the default lookup table
+	 */
+	memmove(save->DAC, defaultDAC, 768);
+	xf86DrvMsg(scrninfp->scrnIndex, X_WARNING,
+	   "Cannot read colourmap from VGA.  Will restore with default\n");
+    } else {
+	/* save the colourmap */
+	hwp->writeDacReadAddr(hwp, 0x02);
+	for (i = 6; i < 768; i++) {
+	    save->DAC[i] = hwp->readDacData(hwp);
+	    DACDelay(hwp);
+#ifdef DEBUG
+	    switch (i % 3) {
+	    case 0:
+		ErrorF("DAC[0x%02x] = 0x%02x, ", i / 3, save->DAC[i]);
+		break;
+	    case 1:
+		ErrorF("0x%02x, ", save->DAC[i]);
+		break;
+	    case 2:
+		ErrorF("0x%02x\n", save->DAC[i]);
+	    }
+#endif
+	}
+    }
+
+    hwp->disablePalette(hwp);
+    hwp->cmapSaved = TRUE;
+#endif
+}
+
+/*
+ * vgaHWSave --
+ *      save the current VGA state
+ */
+
+void
+vgaHWSave(ScrnInfoPtr scrninfp, vgaRegPtr save, int flags)
+{
+    if (save == NULL)
+	return;
+
+   if (flags & VGA_SR_CMAP)
+	vgaHWSaveColormap(scrninfp, save);
+
+   if (flags & VGA_SR_MODE)
+	vgaHWSaveMode(scrninfp, save);
+
+   if (flags & VGA_SR_FONTS)
+	vgaHWSaveFonts(scrninfp, save);
+}
+
+
+/*
+ * vgaHWInit --
+ *      Handle the initialization, etc. of a screen.
+ *      Return FALSE on failure.
+ */
+
+Bool
+vgaHWInit(ScrnInfoPtr scrninfp, DisplayModePtr mode)
+{
+    unsigned int       i;
+    vgaHWPtr hwp;
+    vgaRegPtr regp;
+    int depth = scrninfp->depth;
+
+    /*
+     * make sure the vgaHWRec is allocated
+     */
+    if (!vgaHWGetHWRec(scrninfp))
+	return FALSE;
+    hwp = VGAHWPTR(scrninfp);
+    regp = &hwp->ModeReg;
+    
+    /*
+     * compute correct Hsync & Vsync polarity 
+     */
+    if ((mode->Flags & (V_PHSYNC | V_NHSYNC))
+        && (mode->Flags & (V_PVSYNC | V_NVSYNC)))
+    {
+        regp->MiscOutReg = 0x23;
+        if (mode->Flags & V_NHSYNC) regp->MiscOutReg |= 0x40;
+        if (mode->Flags & V_NVSYNC) regp->MiscOutReg |= 0x80;
+    }
+    else
+    {
+        int VDisplay = mode->VDisplay;
+        if (mode->Flags & V_DBLSCAN)
+            VDisplay *= 2;
+        if (mode->VScan > 1)
+            VDisplay *= mode->VScan;
+        if      (VDisplay < 400)
+            regp->MiscOutReg = 0xA3;		/* +hsync -vsync */
+        else if (VDisplay < 480)
+            regp->MiscOutReg = 0x63;		/* -hsync +vsync */
+        else if (VDisplay < 768)
+            regp->MiscOutReg = 0xE3;		/* -hsync -vsync */
+        else
+            regp->MiscOutReg = 0x23;		/* +hsync +vsync */
+    }
+    
+    regp->MiscOutReg |= (mode->ClockIndex & 0x03) << 2;
+
+    /*
+     * Time Sequencer
+     */
+    if (depth == 4)
+        regp->Sequencer[0] = 0x02;
+    else
+        regp->Sequencer[0] = 0x00;
+    if (mode->Flags & V_CLKDIV2) 
+        regp->Sequencer[1] = 0x09;
+    else
+        regp->Sequencer[1] = 0x01;
+    if (depth == 1)
+        regp->Sequencer[2] = 1 << BIT_PLANE;
+    else
+        regp->Sequencer[2] = 0x0F;
+    regp->Sequencer[3] = 0x00;                             /* Font select */
+    if (depth < 8)
+        regp->Sequencer[4] = 0x06;                             /* Misc */
+    else
+        regp->Sequencer[4] = 0x0E;                             /* Misc */
+
+    /*
+     * CRTC Controller
+     */
+    regp->CRTC[0]  = (mode->CrtcHTotal >> 3) - 5;
+    regp->CRTC[1]  = (mode->CrtcHDisplay >> 3) - 1;
+    regp->CRTC[2]  = (mode->CrtcHBlankStart >> 3) - 1;
+    regp->CRTC[3]  = (((mode->CrtcHBlankEnd >> 3) - 1) & 0x1F) | 0x80;
+    i = (((mode->CrtcHSkew << 2) + 0x10) & ~0x1F);
+    if (i < 0x80)
+	regp->CRTC[3] |= i;
+    regp->CRTC[4]  = (mode->CrtcHSyncStart >> 3);
+    regp->CRTC[5]  = ((((mode->CrtcHBlankEnd >> 3) - 1) & 0x20) << 2)
+	| (((mode->CrtcHSyncEnd >> 3)) & 0x1F);
+    regp->CRTC[6]  = (mode->CrtcVTotal - 2) & 0xFF;
+    regp->CRTC[7]  = (((mode->CrtcVTotal - 2) & 0x100) >> 8)
+	| (((mode->CrtcVDisplay - 1) & 0x100) >> 7)
+	| ((mode->CrtcVSyncStart & 0x100) >> 6)
+	| (((mode->CrtcVBlankStart - 1) & 0x100) >> 5)
+	| 0x10
+	| (((mode->CrtcVTotal - 2) & 0x200)   >> 4)
+	| (((mode->CrtcVDisplay - 1) & 0x200) >> 3)
+	| ((mode->CrtcVSyncStart & 0x200) >> 2);
+    regp->CRTC[8]  = 0x00;
+    regp->CRTC[9]  = (((mode->CrtcVBlankStart - 1) & 0x200) >> 4) | 0x40;
+    if (mode->Flags & V_DBLSCAN)
+	regp->CRTC[9] |= 0x80;
+    if (mode->VScan >= 32)
+	regp->CRTC[9] |= 0x1F;
+    else if (mode->VScan > 1)
+	regp->CRTC[9] |= mode->VScan - 1;
+    regp->CRTC[10] = 0x00;
+    regp->CRTC[11] = 0x00;
+    regp->CRTC[12] = 0x00;
+    regp->CRTC[13] = 0x00;
+    regp->CRTC[14] = 0x00;
+    regp->CRTC[15] = 0x00;
+    regp->CRTC[16] = mode->CrtcVSyncStart & 0xFF;
+    regp->CRTC[17] = (mode->CrtcVSyncEnd & 0x0F) | 0x20;
+    regp->CRTC[18] = (mode->CrtcVDisplay - 1) & 0xFF;
+    regp->CRTC[19] = scrninfp->displayWidth >> 4;  /* just a guess */
+    regp->CRTC[20] = 0x00;
+    regp->CRTC[21] = (mode->CrtcVBlankStart - 1) & 0xFF; 
+    regp->CRTC[22] = (mode->CrtcVBlankEnd - 1) & 0xFF;
+    if (depth < 8)
+	regp->CRTC[23] = 0xE3;
+    else
+	regp->CRTC[23] = 0xC3;
+    regp->CRTC[24] = 0xFF;
+
+    vgaHWHBlankKGA(mode, regp, 0, KGA_FIX_OVERSCAN | KGA_ENABLE_ON_ZERO);
+    vgaHWVBlankKGA(mode, regp, 0, KGA_FIX_OVERSCAN | KGA_ENABLE_ON_ZERO);
+
+    /*
+     * Theory resumes here....
+     */
+
+    /*
+     * Graphics Display Controller
+     */
+    regp->Graphics[0] = 0x00;
+    regp->Graphics[1] = 0x00;
+    regp->Graphics[2] = 0x00;
+    regp->Graphics[3] = 0x00;
+    if (depth == 1) {
+        regp->Graphics[4] = BIT_PLANE;
+        regp->Graphics[5] = 0x00;
+    } else {
+        regp->Graphics[4] = 0x00;
+        if (depth == 4)
+            regp->Graphics[5] = 0x02;
+        else
+            regp->Graphics[5] = 0x40;
+    }
+    regp->Graphics[6] = 0x05;   /* only map 64k VGA memory !!!! */
+    regp->Graphics[7] = 0x0F;
+    regp->Graphics[8] = 0xFF;
+  
+    if (depth == 1) {
+        /* Initialise the Mono map according to which bit-plane gets used */
+
+	Bool flipPixels = xf86GetFlipPixels();
+
+        for (i=0; i<16; i++)
+            if (((i & (1 << BIT_PLANE)) != 0) != flipPixels)
+                regp->Attribute[i] = WHITE_VALUE;
+            else
+                regp->Attribute[i] = BLACK_VALUE;
+
+        regp->Attribute[16] = 0x01;  /* -VGA2- */ /* wrong for the ET4000 */
+	if (!hwp->ShowOverscan)
+            regp->Attribute[OVERSCAN] = OVERSCAN_VALUE;  /* -VGA2- */
+    } else {
+        regp->Attribute[0]  = 0x00; /* standard colormap translation */
+        regp->Attribute[1]  = 0x01;
+        regp->Attribute[2]  = 0x02;
+        regp->Attribute[3]  = 0x03;
+        regp->Attribute[4]  = 0x04;
+        regp->Attribute[5]  = 0x05;
+        regp->Attribute[6]  = 0x06;
+        regp->Attribute[7]  = 0x07;
+        regp->Attribute[8]  = 0x08;
+        regp->Attribute[9]  = 0x09;
+        regp->Attribute[10] = 0x0A;
+        regp->Attribute[11] = 0x0B;
+        regp->Attribute[12] = 0x0C;
+        regp->Attribute[13] = 0x0D;
+        regp->Attribute[14] = 0x0E;
+        regp->Attribute[15] = 0x0F;
+        if (depth == 4)
+            regp->Attribute[16] = 0x81; /* wrong for the ET4000 */
+        else
+            regp->Attribute[16] = 0x41; /* wrong for the ET4000 */
+        /* Attribute[17] (overscan) initialised in vgaHWGetHWRec() */
+    }
+    regp->Attribute[18] = 0x0F;
+    regp->Attribute[19] = 0x00;
+    regp->Attribute[20] = 0x00;
+
+    return(TRUE);
+}
+
+    /*
+     * OK, so much for theory.  Now, let's deal with the >real< world...
+     *
+     * The above CRTC settings are precise in theory, except that many, if not
+     * most, VGA clones fail to reset the blanking signal when the character or
+     * line counter reaches [HV]Total.  In this case, the signal is only
+     * unblanked when the counter reaches [HV]BlankEnd (mod 64, 128 or 256 as
+     * the case may be) at the start of the >next< scanline or frame, which
+     * means only part of the screen shows.  This affects how null overscans
+     * are to be implemented on such adapters.
+     *
+     * Henceforth, VGA cores that implement this broken, but unfortunately
+     * common, behaviour are to be designated as KGA's, in honour of Koen
+     * Gadeyne, whose zeal to eliminate overscans (read: fury) set in motion
+     * a series of events that led to the discovery of this problem.
+     *
+     * Some VGA's are KGA's only in the horizontal, or only in the vertical,
+     * some in both, others in neither.  Don't let anyone tell you there is
+     * such a thing as a VGA "standard"...  And, thank the Creator for the fact
+     * that Hilbert spaces are not yet implemented in this industry.
+     *
+     * The following implements a trick suggested by David Dawes.  This sets
+     * [HV]BlankEnd to zero if the blanking interval does not already contain a
+     * 0-point, and decrements it by one otherwise.  In the latter case, this
+     * will produce a left and/or top overscan which the colourmap code will
+     * (still) need to ensure is as close to black as possible.  This will make
+     * the behaviour consistent across all chipsets, while allowing all
+     * chipsets to display the entire screen.  Non-KGA drivers can ignore the
+     * following in their own copy of this code.
+     *
+     * --  TSI @ UQV,  1998.08.21
+     */
+
+CARD32
+vgaHWHBlankKGA(DisplayModePtr mode, vgaRegPtr regp, int nBits, 
+	       unsigned int Flags)
+{
+    int nExtBits = (nBits < 6) ? 0 : nBits - 6;
+    CARD32 ExtBits;
+    CARD32 ExtBitMask = ((1 << nExtBits) - 1) << 6;
+
+    regp->CRTC[3]  = (regp->CRTC[3] & ~0x1F) 
+                     | (((mode->CrtcHBlankEnd >> 3) - 1) & 0x1F);
+    regp->CRTC[5]  = (regp->CRTC[5] & ~0x80) 
+                     | ((((mode->CrtcHBlankEnd >> 3) - 1) & 0x20) << 2);
+    ExtBits        = ((mode->CrtcHBlankEnd >> 3) - 1) & ExtBitMask;
+
+    /* First the horizontal case */
+    if ((Flags & KGA_FIX_OVERSCAN)
+	&& ((mode->CrtcHBlankEnd >> 3) == (mode->CrtcHTotal >> 3)))
+    {
+	int i = (regp->CRTC[3] & 0x1F) 
+	    | ((regp->CRTC[5] & 0x80) >> 2)
+	    | ExtBits;
+	if (Flags & KGA_ENABLE_ON_ZERO) {
+	    if ((i-- > (((mode->CrtcHBlankStart >> 3) - 1) 
+		       & (0x3F | ExtBitMask)))
+	    && (mode->CrtcHBlankEnd == mode->CrtcHTotal))
+	    i = 0;
+	} else if (Flags & KGA_BE_TOT_DEC)
+	    i--;
+	regp->CRTC[3] = (regp->CRTC[3] & ~0x1F) | (i & 0x1F);
+	regp->CRTC[5] = (regp->CRTC[5] & ~0x80) | ((i << 2) & 0x80);
+	ExtBits = i & ExtBitMask;
+    }
+    return ExtBits >> 6;
+}
+
+    /*
+     * The vertical case is a little trickier.  Some VGA's ignore bit 0x80 of
+     * CRTC[22].  Also, in some cases, a zero CRTC[22] will still blank the
+     * very first scanline in a double- or multi-scanned mode.  This last case
+     * needs further investigation.
+     */
+CARD32
+vgaHWVBlankKGA(DisplayModePtr mode, vgaRegPtr regp, int nBits, 
+	       unsigned int Flags)
+{
+    CARD32 ExtBits;
+    CARD32 nExtBits = (nBits < 8) ? 0 : (nBits - 8);
+    CARD32 ExtBitMask = ((1 << nExtBits) - 1) << 8;
+    /* If width is not known nBits should be 0. In this 
+     * case BitMask is set to 0 so we can check for it. */
+    CARD32 BitMask = (nBits < 7) ? 0 : ((1 << nExtBits) - 1);
+    int VBlankStart = (mode->CrtcVBlankStart - 1) & 0xFF; 
+    regp->CRTC[22] = (mode->CrtcVBlankEnd - 1) & 0xFF;
+    ExtBits        = (mode->CrtcVBlankEnd - 1) & ExtBitMask;
+
+    if ((Flags & KGA_FIX_OVERSCAN) 
+	&& (mode->CrtcVBlankEnd == mode->CrtcVTotal))
+      /* Null top overscan */
+    {
+	int i = regp->CRTC[22] | ExtBits;
+	if (Flags & KGA_ENABLE_ON_ZERO) {
+	    if (((BitMask && ((i & BitMask) > (VBlankStart & BitMask)))
+	     || ((i > VBlankStart)  &&  		/* 8-bit case */
+	    ((i & 0x7F) > (VBlankStart & 0x7F)))) &&	/* 7-bit case */
+	    !(regp->CRTC[9] & 0x9F))			/* 1 scanline/row */
+	    i = 0;
+	else
+	    i = (i - 1);
+	} else if (Flags & KGA_BE_TOT_DEC)
+	    i = (i - 1);
+
+	regp->CRTC[22] = i & 0xFF;
+	ExtBits = i & 0xFF00;
+    }
+	return ExtBits >> 8;
+}
+
+/*
+ * these are some more hardware specific helpers, formerly in vga.c
+ */
+static void
+vgaHWGetHWRecPrivate(void)
+{
+    if (vgaHWPrivateIndex < 0)
+	vgaHWPrivateIndex = xf86AllocateScrnInfoPrivateIndex();
+    return;
+}
+
+
+static void
+vgaHWFreeRegs(vgaRegPtr regp)
+{
+    if (regp->CRTC)
+    	xfree (regp->CRTC);
+
+    regp->CRTC =
+    regp->Sequencer =
+    regp->Graphics =
+    regp->Attribute = NULL;
+
+    regp->numCRTC =
+    regp->numSequencer =
+    regp->numGraphics =
+    regp->numAttribute = 0;
+}
+
+
+
+static Bool
+vgaHWAllocRegs(vgaRegPtr regp)
+{
+    unsigned char *buf;
+
+    if ((regp->numCRTC + regp->numSequencer + regp->numGraphics +
+         regp->numAttribute) == 0)
+        return FALSE;
+
+    buf = xcalloc(regp->numCRTC +
+    		  regp->numSequencer +
+		  regp->numGraphics +
+		  regp->numAttribute, 1);
+    if (!buf)
+    	return FALSE;
+
+    regp->CRTC = buf;
+    regp->Sequencer = regp->CRTC + regp->numCRTC;
+    regp->Graphics = regp->Sequencer + regp->numSequencer;
+    regp->Attribute = regp->Graphics + regp->numGraphics;
+
+    return TRUE;
+}
+
+
+Bool
+vgaHWAllocDefaultRegs(vgaRegPtr regp)
+{
+    regp->numCRTC = VGA_NUM_CRTC;
+    regp->numSequencer = VGA_NUM_SEQ;
+    regp->numGraphics = VGA_NUM_GFX;
+    regp->numAttribute = VGA_NUM_ATTR;
+
+    return vgaHWAllocRegs(regp);
+}
+
+
+Bool
+vgaHWSetRegCounts(ScrnInfoPtr scrp, int numCRTC, int numSequencer,
+		  int numGraphics, int numAttribute)
+{
+#define VGAHWMINNUM(regtype) \
+	((newMode.num##regtype < regp->num##regtype) ? \
+	 (newMode.num##regtype) : (regp->num##regtype))
+#define VGAHWCOPYREGSET(regtype) \
+	memcpy (newMode.regtype, regp->regtype, VGAHWMINNUM(regtype))
+
+    vgaRegRec newMode, newSaved;
+    vgaRegPtr regp;
+
+    regp = &VGAHWPTR(scrp)->ModeReg;
+    memcpy (&newMode, regp, sizeof(vgaRegRec));
+
+    /* allocate space for new registers */
+
+    regp = &newMode;
+    regp->numCRTC = numCRTC;
+    regp->numSequencer = numSequencer;
+    regp->numGraphics = numGraphics;
+    regp->numAttribute = numAttribute;
+    if (!vgaHWAllocRegs(regp))
+    	return FALSE;
+
+    regp = &VGAHWPTR(scrp)->SavedReg;
+    memcpy (&newSaved, regp, sizeof(vgaRegRec));
+
+    regp = &newSaved;
+    regp->numCRTC = numCRTC;
+    regp->numSequencer = numSequencer;
+    regp->numGraphics = numGraphics;
+    regp->numAttribute = numAttribute;
+    if (!vgaHWAllocRegs(regp)) {
+        vgaHWFreeRegs(&newMode);
+    	return FALSE;
+    }
+
+    /* allocations succeeded, copy register data into new space */
+
+    regp = &VGAHWPTR(scrp)->ModeReg;
+    VGAHWCOPYREGSET(CRTC);
+    VGAHWCOPYREGSET(Sequencer);
+    VGAHWCOPYREGSET(Graphics);
+    VGAHWCOPYREGSET(Attribute);
+
+    regp = &VGAHWPTR(scrp)->SavedReg;
+    VGAHWCOPYREGSET(CRTC);
+    VGAHWCOPYREGSET(Sequencer);
+    VGAHWCOPYREGSET(Graphics);
+    VGAHWCOPYREGSET(Attribute);
+
+    /* free old register arrays */
+
+    regp = &VGAHWPTR(scrp)->ModeReg;
+    vgaHWFreeRegs(regp);
+    memcpy(regp, &newMode, sizeof(vgaRegRec));
+
+    regp = &VGAHWPTR(scrp)->SavedReg;
+    vgaHWFreeRegs(regp);
+    memcpy(regp, &newSaved, sizeof(vgaRegRec));
+
+    return TRUE;
+
+#undef VGAHWMINNUM
+#undef VGAHWCOPYREGSET
+}
+
+
+Bool
+vgaHWCopyReg(vgaRegPtr dst, vgaRegPtr src)
+{
+    vgaHWFreeRegs(dst);
+
+    memcpy(dst, src, sizeof(vgaRegRec));
+
+    if (!vgaHWAllocRegs(dst))
+	return FALSE;
+
+    memcpy(dst->CRTC, src->CRTC, src->numCRTC);
+    memcpy(dst->Sequencer, src->Sequencer, src->numSequencer);
+    memcpy(dst->Graphics, src->Graphics, src->numGraphics);
+    memcpy(dst->Attribute, src->Attribute, src->numAttribute);
+
+    return TRUE;
+}
+
+
+Bool
+vgaHWGetHWRec(ScrnInfoPtr scrp)
+{
+    vgaRegPtr regp;
+    vgaHWPtr hwp;
+    pciVideoPtr pvp;
+    int i;
+    
+    /*
+     * Let's make sure that the private exists and allocate one.
+     */
+    vgaHWGetHWRecPrivate();
+    /*
+     * New privates are always set to NULL, so we can check if the allocation
+     * has already been done.
+     */
+    if (VGAHWPTR(scrp))
+	return TRUE;
+    hwp = VGAHWPTRLVAL(scrp) = xnfcalloc(sizeof(vgaHWRec), 1);
+    regp = &VGAHWPTR(scrp)->ModeReg;
+
+    if ((!vgaHWAllocDefaultRegs(&VGAHWPTR(scrp)->SavedReg)) ||
+    	(!vgaHWAllocDefaultRegs(&VGAHWPTR(scrp)->ModeReg))) {
+        xfree(hwp);
+	return FALSE;
+    }
+
+    if (scrp->bitsPerPixel == 1) {
+	rgb blackColour = scrp->display->blackColour,
+	    whiteColour = scrp->display->whiteColour;
+
+	if (blackColour.red   > 0x3F) blackColour.red   = 0x3F;
+	if (blackColour.green > 0x3F) blackColour.green = 0x3F;
+	if (blackColour.blue  > 0x3F) blackColour.blue  = 0x3F;
+
+	if (whiteColour.red   > 0x3F) whiteColour.red   = 0x3F;
+	if (whiteColour.green > 0x3F) whiteColour.green = 0x3F;
+	if (whiteColour.blue  > 0x3F) whiteColour.blue  = 0x3F;
+
+	if ((blackColour.red   == whiteColour.red  ) &&
+	    (blackColour.green == whiteColour.green) &&
+	    (blackColour.blue  == whiteColour.blue )) {
+	    blackColour.red   ^= 0x3F;
+	    blackColour.green ^= 0x3F;
+	    blackColour.blue  ^= 0x3F;
+	}
+
+        /*
+         * initialize default colormap for monochrome
+         */
+        for (i=0; i<3;   i++) regp->DAC[i] = 0x00;
+        for (i=3; i<768; i++) regp->DAC[i] = 0x3F;
+        i = BLACK_VALUE * 3;
+        regp->DAC[i++] = blackColour.red;
+        regp->DAC[i++] = blackColour.green;
+        regp->DAC[i] = blackColour.blue;
+        i = WHITE_VALUE * 3;
+        regp->DAC[i++] = whiteColour.red;
+        regp->DAC[i++] = whiteColour.green;
+        regp->DAC[i] = whiteColour.blue;
+        i = OVERSCAN_VALUE * 3;
+        regp->DAC[i++] = 0x00;
+        regp->DAC[i++] = 0x00;
+        regp->DAC[i] = 0x00;
+    } else {
+	/* Set all colours to black */
+        for (i=0; i<768; i++) regp->DAC[i] = 0x00;
+        /* ... and the overscan */
+        if (scrp->depth >= 4)
+            regp->Attribute[OVERSCAN] = 0xFF;
+    }
+    if (xf86FindOption(scrp->confScreen->options, "ShowOverscan")) {
+	xf86MarkOptionUsedByName(scrp->confScreen->options, "ShowOverscan");
+	xf86DrvMsg(scrp->scrnIndex, X_CONFIG, "Showing overscan area\n");
+	regp->DAC[765] = 0x3F; 
+	regp->DAC[766] = 0x00; 
+	regp->DAC[767] = 0x3F; 
+	regp->Attribute[OVERSCAN] = 0xFF;
+	hwp->ShowOverscan = TRUE;
+    } else
+	hwp->ShowOverscan = FALSE;
+
+    hwp->paletteEnabled = FALSE;
+    hwp->cmapSaved = FALSE;
+    hwp->MapSize = 0;
+    hwp->pScrn = scrp;
+
+    /* Initialise the function pointers with the standard VGA versions */
+    vgaHWSetStdFuncs(hwp);
+
+    hwp->PIOOffset = scrp->domainIOBase;
+    if ((pvp = xf86GetPciInfoForEntity(scrp->entityList[0])))
+	hwp->Tag = pciTag(pvp->bus, pvp->device, pvp->func);
+
+    return TRUE;
+}
+
+
+void
+vgaHWFreeHWRec(ScrnInfoPtr scrp)
+{
+    if (vgaHWPrivateIndex >= 0) {
+	vgaHWPtr hwp = VGAHWPTR(scrp);
+
+	if (!hwp)
+	    return;
+
+	xfree(hwp->FontInfo1);
+	xfree(hwp->FontInfo2);
+	xfree(hwp->TextInfo);
+
+	vgaHWFreeRegs (&hwp->ModeReg);
+	vgaHWFreeRegs (&hwp->SavedReg);
+
+	xfree(hwp);
+	VGAHWPTRLVAL(scrp) = NULL;
+    }
+}
+
+
+Bool
+vgaHWMapMem(ScrnInfoPtr scrp)
+{
+    vgaHWPtr hwp = VGAHWPTR(scrp);
+    int scr_index = scrp->scrnIndex;
+    
+    if (hwp->Base)
+	return TRUE;
+
+    /* If not set, initialise with the defaults */
+    if (hwp->MapSize == 0)
+	hwp->MapSize = VGA_DEFAULT_MEM_SIZE;
+    if (hwp->MapPhys == 0)
+	hwp->MapPhys = VGA_DEFAULT_PHYS_ADDR;
+
+    /*
+     * Map as VIDMEM_MMIO_32BIT because WC
+     * is bad when there is page flipping.
+     * XXX This is not correct but we do it
+     * for now.
+     */
+#ifdef DEBUG
+    ErrorF("Mapping VGAMem\n");
+#endif
+    hwp->Base = xf86MapDomainMemory(scr_index, VIDMEM_MMIO_32BIT, hwp->Tag,
+				    hwp->MapPhys, hwp->MapSize);
+    return hwp->Base != NULL;
+}
+
+
+void
+vgaHWUnmapMem(ScrnInfoPtr scrp)
+{
+    vgaHWPtr hwp = VGAHWPTR(scrp);
+    int scr_index = scrp->scrnIndex;
+
+    if (hwp->Base == NULL)
+	return;
+    
+#ifdef DEBUG
+    ErrorF("Unmapping VGAMem\n");
+#endif
+    xf86UnMapVidMem(scr_index, hwp->Base, hwp->MapSize);
+    hwp->Base = NULL;
+}
+
+int
+vgaHWGetIndex()
+{
+    return vgaHWPrivateIndex;
+}
+
+
+void
+vgaHWGetIOBase(vgaHWPtr hwp)
+{
+    hwp->IOBase = (hwp->readMiscOut(hwp) & 0x01) ?
+				VGA_IOBASE_COLOR : VGA_IOBASE_MONO;
+    xf86DrvMsgVerb(hwp->pScrn->scrnIndex, X_INFO, 3,
+	"vgaHWGetIOBase: hwp->IOBase is 0x%04x, hwp->PIOOffset is 0x%04lx\n",
+	hwp->IOBase, hwp->PIOOffset);
+}
+
+
+void
+vgaHWLock(vgaHWPtr hwp)
+{
+    /* Protect CRTC[0-7] */
+    hwp->writeCrtc(hwp, 0x11, hwp->readCrtc(hwp, 0x11) | 0x80);
+}
+
+void
+vgaHWUnlock(vgaHWPtr hwp)
+{
+    /* Unprotect CRTC[0-7] */
+     hwp->writeCrtc(hwp, 0x11, hwp->readCrtc(hwp, 0x11) & ~0x80);
+}
+
+
+void
+vgaHWEnable(vgaHWPtr hwp)
+{
+    hwp->writeEnable(hwp, hwp->readEnable(hwp) | 0x01);
+}
+
+
+void
+vgaHWDisable(vgaHWPtr hwp)
+{
+    hwp->writeEnable(hwp, hwp->readEnable(hwp) & ~0x01);
+}
+
+
+static void
+vgaHWLoadPalette(ScrnInfoPtr pScrn, int numColors, int *indices, LOCO *colors,
+		 VisualPtr pVisual)
+{
+    vgaHWPtr hwp = VGAHWPTR(pScrn);
+    int i, index;
+
+    for (i = 0; i < numColors; i++) {
+	index = indices[i];
+	hwp->writeDacWriteAddr(hwp, index);
+	DACDelay(hwp);
+	hwp->writeDacData(hwp, colors[index].red);
+	DACDelay(hwp);
+	hwp->writeDacData(hwp, colors[index].green);
+	DACDelay(hwp);
+	hwp->writeDacData(hwp, colors[index].blue);
+	DACDelay(hwp);
+    }
+
+    /* This shouldn't be necessary, but we'll play safe. */
+    hwp->disablePalette(hwp);
+}
+
+
+static void
+vgaHWSetOverscan(ScrnInfoPtr pScrn, int overscan)
+{
+    vgaHWPtr hwp = VGAHWPTR(pScrn);
+
+    if (overscan < 0 || overscan > 255)
+	return;
+
+    hwp->enablePalette(hwp);
+    hwp->writeAttr(hwp, OVERSCAN, overscan);
+
+#ifdef DEBUGOVERSCAN
+    {
+	int ov = hwp->readAttr(hwp, OVERSCAN);
+	int red, green, blue;
+
+	hwp->writeDacReadAddr(hwp, ov);
+	red = hwp->readDacData(hwp);
+	green = hwp->readDacData(hwp);
+	blue = hwp->readDacData(hwp);
+	ErrorF("Overscan index is 0x%02x, colours are #%02x%02x%02x\n",
+		ov, red, green, blue);
+    }
+#endif
+
+    hwp->disablePalette(hwp);
+}
+
+
+Bool
+vgaHWHandleColormaps(ScreenPtr pScreen)
+{
+    ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
+
+    if (pScrn->depth > 1 && pScrn->depth <= 8) {
+	return xf86HandleColormaps(pScreen, 1 << pScrn->depth,
+				   pScrn->rgbBits, vgaHWLoadPalette,
+				   pScrn->depth > 4 ? vgaHWSetOverscan : NULL,
+				   CMAP_RELOAD_ON_MODE_SWITCH);
+    }
+    return TRUE;
+}
+
+/* ----------------------- DDC support ------------------------*/
+/* 
+ * Adjust v_active, v_blank, v_sync, v_sync_end, v_blank_end, v_total
+ * to read out EDID at a faster rate. Allowed maximum is 25kHz with
+ * 20 usec v_sync active. Set positive v_sync polarity, turn off lightpen
+ * readback, enable access to cr00-cr07.
+ */
+
+/* vertical timings */
+#define DISPLAY_END 0x04
+#define BLANK_START DISPLAY_END
+#define SYNC_START BLANK_START
+#define SYNC_END 0x09
+#define BLANK_END SYNC_END
+#define V_TOTAL BLANK_END
+/* this function doesn't have to be reentrant for our purposes */
+struct _vgaDdcSave {
+    unsigned char cr03;
+    unsigned char cr06;
+    unsigned char cr07;
+    unsigned char cr09;
+    unsigned char cr10;
+    unsigned char cr11;
+    unsigned char cr12;
+    unsigned char cr15;
+    unsigned char cr16;
+    unsigned char msr;
+};
+
+void
+vgaHWddc1SetSpeed(ScrnInfoPtr pScrn, xf86ddcSpeed speed)
+{
+    vgaHWPtr hwp = VGAHWPTR(pScrn);
+    unsigned char tmp;
+    struct _vgaDdcSave* save;
+    switch (speed) {
+    case DDC_FAST:
+        
+        if (hwp->ddc != NULL) break;
+        hwp->ddc = xnfcalloc(sizeof(struct _vgaDdcSave),1);
+	save = (struct _vgaDdcSave *)hwp->ddc;
+      /* Lightpen register disable - allow access to cr10 & 11; just in case */
+	save->cr03 = hwp->readCrtc(hwp, 0x03); 
+	hwp->writeCrtc(hwp,0x03,(save->cr03 |0x80));
+	save->cr12 = hwp->readCrtc(hwp, 0x12); 
+	hwp->writeCrtc(hwp,0x12,DISPLAY_END);
+	save->cr15 = hwp->readCrtc(hwp, 0x15); 
+	hwp->writeCrtc(hwp,0x15,BLANK_START);
+	save->cr10 = hwp->readCrtc(hwp, 0x10); 
+	hwp->writeCrtc(hwp,0x10,SYNC_START);
+	save->cr11 = hwp->readCrtc(hwp, 0x11); 
+	/* unprotect group 1 registers; just in case ...*/
+	hwp->writeCrtc(hwp,0x11,((save->cr11 & 0x70) | SYNC_END));
+	save->cr16 = hwp->readCrtc(hwp, 0x16); 
+	hwp->writeCrtc(hwp,0x16,BLANK_END);
+	save->cr06 = hwp->readCrtc(hwp, 0x06); 
+	hwp->writeCrtc(hwp,0x06,V_TOTAL);
+	/* all values have less than 8 bit - mask out 9th and 10th bits */
+	save->cr09 = hwp->readCrtc(hwp, 0x09); 
+	hwp->writeCrtc(hwp,0x09,(save->cr09 &0xDF));
+	save->cr07 = hwp->readCrtc(hwp, 0x07); 
+	hwp->writeCrtc(hwp,0x07,(save->cr07 &0x10));
+	/* vsync polarity negativ & ensure a 25MHz clock */
+	save->msr = hwp->readMiscOut(hwp); 
+	hwp->writeMiscOut(hwp,((save->msr & 0xF3) | 0x80));
+	break;
+    case DDC_SLOW:
+        if (hwp->ddc == NULL) break;
+	save = (struct _vgaDdcSave *)hwp->ddc;
+	hwp->writeMiscOut(hwp,save->msr);
+	hwp->writeCrtc(hwp,0x07,save->cr07);
+	tmp = hwp->readCrtc(hwp, 0x09);
+	hwp->writeCrtc(hwp,0x09,((save->cr09 & 0x20) | (tmp & 0xDF)));
+	hwp->writeCrtc(hwp,0x06,save->cr06);
+	hwp->writeCrtc(hwp,0x16,save->cr16);
+	hwp->writeCrtc(hwp,0x11,save->cr11);
+	hwp->writeCrtc(hwp,0x10,save->cr10);
+	hwp->writeCrtc(hwp,0x15,save->cr15);
+	hwp->writeCrtc(hwp,0x12,save->cr12);
+	hwp->writeCrtc(hwp,0x03,save->cr03);
+	xfree(save);
+	hwp->ddc = NULL;
+	break;
+    default:
+	break;
+    }
+}
diff --git a/hw/xfree86/vgahw/vgaHW.h b/hw/xfree86/vgahw/vgaHW.h
new file mode 100644
index 000000000..9a51f1046
--- /dev/null
+++ b/hw/xfree86/vgahw/vgaHW.h
@@ -0,0 +1,228 @@
+/* $XFree86: xc/programs/Xserver/hw/xfree86/vgahw/vgaHW.h,v 1.31 2002/04/04 14:05:56 eich Exp $ */
+
+
+/*
+ * Copyright (c) 1997,1998 The XFree86 Project, Inc.
+ *
+ * Loosely based on code bearing the following copyright:
+ *
+ *   Copyright 1990,91 by Thomas Roell, Dinkelscherben, Germany.
+ *
+ * Author: Dirk Hohndel
+ */
+
+#ifndef _VGAHW_H
+#define _VGAHW_H
+
+#include "X.h"
+#include "misc.h"
+#include "input.h"
+#include "scrnintstr.h"
+#include "colormapst.h"
+
+#include "xf86str.h"
+#include "xf86Pci.h"
+
+#include "xf86DDC.h"
+
+#include "globals.h"
+#define DPMS_SERVER
+#include "extensions/dpms.h"
+
+extern int vgaHWGetIndex(void);
+
+/*
+ * access macro
+ */
+#define VGAHWPTR(p) ((vgaHWPtr)((p)->privates[vgaHWGetIndex()].ptr))
+
+/* Standard VGA registers */
+#define VGA_ATTR_INDEX		0x3C0
+#define VGA_ATTR_DATA_W		0x3C0
+#define VGA_ATTR_DATA_R		0x3C1
+#define VGA_IN_STAT_0		0x3C2		/* read */
+#define VGA_MISC_OUT_W		0x3C2		/* write */
+#define VGA_ENABLE		0x3C3
+#define VGA_SEQ_INDEX		0x3C4
+#define VGA_SEQ_DATA		0x3C5
+#define VGA_DAC_MASK		0x3C6
+#define VGA_DAC_READ_ADDR	0x3C7
+#define VGA_DAC_WRITE_ADDR	0x3C8
+#define VGA_DAC_DATA		0x3C9
+#define VGA_FEATURE_R		0x3CA		/* read */
+#define VGA_MISC_OUT_R		0x3CC		/* read */
+#define VGA_GRAPH_INDEX		0x3CE
+#define VGA_GRAPH_DATA		0x3CF
+
+#define VGA_IOBASE_MONO		0x3B0
+#define VGA_IOBASE_COLOR	0x3D0
+
+#define VGA_CRTC_INDEX_OFFSET	0x04
+#define VGA_CRTC_DATA_OFFSET	0x05
+#define VGA_IN_STAT_1_OFFSET	0x0A		/* read */
+#define VGA_FEATURE_W_OFFSET	0x0A		/* write */
+
+/* default number of VGA registers stored internally */
+#define VGA_NUM_CRTC 25
+#define VGA_NUM_SEQ 5
+#define VGA_NUM_GFX 9
+#define VGA_NUM_ATTR 21
+
+/* Flags for vgaHWSave() and vgaHWRestore() */
+#define VGA_SR_MODE		0x01
+#define VGA_SR_FONTS		0x02
+#define VGA_SR_CMAP		0x04
+#define VGA_SR_ALL		(VGA_SR_MODE | VGA_SR_FONTS | VGA_SR_CMAP)
+
+/* Defaults for the VGA memory window */
+#define VGA_DEFAULT_PHYS_ADDR	0xA0000
+#define VGA_DEFAULT_MEM_SIZE	(64 * 1024)
+
+/*
+ * vgaRegRec contains settings of standard VGA registers.
+ */
+typedef struct {
+    unsigned char MiscOutReg;     /* */
+    unsigned char *CRTC;       /* Crtc Controller */
+    unsigned char *Sequencer;   /* Video Sequencer */
+    unsigned char *Graphics;    /* Video Graphics */
+    unsigned char *Attribute;  /* Video Atribute */
+    unsigned char DAC[768];       /* Internal Colorlookuptable */
+    unsigned char numCRTC;	/* number of CRTC registers, def=VGA_NUM_CRTC */
+    unsigned char numSequencer;	/* number of seq registers, def=VGA_NUM_SEQ */
+    unsigned char numGraphics;	/* number of gfx registers, def=VGA_NUM_GFX */
+    unsigned char numAttribute;	/* number of attr registers, def=VGA_NUM_ATTR */
+} vgaRegRec, *vgaRegPtr;
+
+typedef struct _vgaHWRec *vgaHWPtr;
+
+typedef void (*vgaHWWriteIndexProcPtr)(vgaHWPtr hwp, CARD8 indx, CARD8 value);
+typedef CARD8 (*vgaHWReadIndexProcPtr)(vgaHWPtr hwp, CARD8 indx);
+typedef void (*vgaHWWriteProcPtr)(vgaHWPtr hwp, CARD8 value);
+typedef CARD8 (*vgaHWReadProcPtr)(vgaHWPtr hwp);
+typedef void (*vgaHWMiscProcPtr)(vgaHWPtr hwp);
+
+
+/*
+ * vgaHWRec contains per-screen information required by the vgahw module.
+ *
+ * Note, the palette referred to by the paletteEnabled, enablePalette and
+ * disablePalette is the 16-entry (+overscan) EGA-compatible palette accessed
+ * via the first 17 attribute registers and not the main 8-bit palette.
+ */
+typedef struct _vgaHWRec {
+    pointer			Base;		/* Address of "VGA" memory */
+    int				MapSize;	/* Size of "VGA" memory */
+    unsigned long		MapPhys;	/* phys location of VGA mem */
+    int				IOBase;		/* I/O Base address */
+    CARD8 * 			MMIOBase;	/* Pointer to MMIO start */
+    int				MMIOOffset;	/* base + offset + vgareg
+						   = mmioreg */
+    pointer			FontInfo1;	/* save area for fonts in
+							plane 2 */ 
+    pointer			FontInfo2;	/* save area for fonts in	
+							plane 3 */ 
+    pointer			TextInfo;	/* save area for text */ 
+    vgaRegRec			SavedReg;	/* saved registers */
+    vgaRegRec			ModeReg;	/* register settings for
+							current mode */
+    Bool			ShowOverscan;
+    Bool			paletteEnabled;
+    Bool			cmapSaved;
+    ScrnInfoPtr			pScrn;
+    vgaHWWriteIndexProcPtr	writeCrtc;
+    vgaHWReadIndexProcPtr	readCrtc;
+    vgaHWWriteIndexProcPtr	writeGr;
+    vgaHWReadIndexProcPtr	readGr;
+    vgaHWReadProcPtr            readST00;
+    vgaHWReadProcPtr            readST01;
+    vgaHWReadProcPtr            readFCR;
+    vgaHWWriteProcPtr           writeFCR;
+    vgaHWWriteIndexProcPtr	writeAttr;
+    vgaHWReadIndexProcPtr	readAttr;
+    vgaHWWriteIndexProcPtr	writeSeq;
+    vgaHWReadIndexProcPtr	readSeq;
+    vgaHWWriteProcPtr		writeMiscOut;
+    vgaHWReadProcPtr		readMiscOut;
+    vgaHWMiscProcPtr		enablePalette;
+    vgaHWMiscProcPtr		disablePalette;
+    vgaHWWriteProcPtr		writeDacMask;
+    vgaHWReadProcPtr		readDacMask;
+    vgaHWWriteProcPtr		writeDacWriteAddr;
+    vgaHWWriteProcPtr		writeDacReadAddr;
+    vgaHWWriteProcPtr		writeDacData;
+    vgaHWReadProcPtr		readDacData;
+    pointer                     ddc;
+    IOADDRESS			PIOOffset;	/* offset + vgareg
+						   = pioreg */
+    vgaHWReadProcPtr		readEnable;
+    vgaHWWriteProcPtr		writeEnable;
+    PCITAG			Tag;
+} vgaHWRec;
+
+/* Some macros that VGA drivers can use in their ChipProbe() function */
+#define VGAHW_GET_IOBASE()	((inb(VGA_MISC_OUT_R) & 0x01) ?		      \
+					 VGA_IOBASE_COLOR : VGA_IOBASE_MONO)
+
+#define OVERSCAN 0x11		/* Index of OverScan register */
+
+/* Flags that define how overscan correction should take place */
+#define KGA_FIX_OVERSCAN  1   /* overcan correction required */
+#define KGA_ENABLE_ON_ZERO 2  /* if possible enable display at beginning */
+                              /* of next scanline/frame                  */
+#define KGA_BE_TOT_DEC 4      /* always fix problem by setting blank end */
+			      /* to total - 1                            */
+#define BIT_PLANE 3		/* Which plane we write to in mono mode */
+#define BITS_PER_GUN 6
+#define COLORMAP_SIZE 256
+
+#if defined(__powerpc__)
+#define DACDelay(hw) /* No legacy VGA support */
+#else
+#define DACDelay(hw)							      \
+	do {								      \
+	    (void)inb((hw)->PIOOffset + (hw)->IOBase + VGA_IN_STAT_1_OFFSET); \
+	    (void)inb((hw)->PIOOffset + (hw)->IOBase + VGA_IN_STAT_1_OFFSET); \
+	} while (0)
+#endif
+
+/* Function Prototypes */
+
+/* vgaHW.c */
+
+void vgaHWSetStdFuncs(vgaHWPtr hwp);
+void vgaHWSetMmioFuncs(vgaHWPtr hwp, CARD8 *base, int offset);
+void vgaHWProtect(ScrnInfoPtr pScrn, Bool on);
+Bool vgaHWSaveScreen(ScreenPtr pScreen, int mode);
+void vgaHWBlankScreen(ScrnInfoPtr pScrn, Bool on);
+void vgaHWSeqReset(vgaHWPtr hwp, Bool start);
+void vgaHWRestoreFonts(ScrnInfoPtr scrninfp, vgaRegPtr restore);
+void vgaHWRestoreMode(ScrnInfoPtr scrninfp, vgaRegPtr restore);
+void vgaHWRestoreColormap(ScrnInfoPtr scrninfp, vgaRegPtr restore);
+void vgaHWRestore(ScrnInfoPtr scrninfp, vgaRegPtr restore, int flags);
+void vgaHWSaveFonts(ScrnInfoPtr scrninfp, vgaRegPtr save);
+void vgaHWSaveMode(ScrnInfoPtr scrninfp, vgaRegPtr save);
+void vgaHWSaveColormap(ScrnInfoPtr scrninfp, vgaRegPtr save);
+void vgaHWSave(ScrnInfoPtr scrninfp, vgaRegPtr save, int flags);
+Bool vgaHWInit(ScrnInfoPtr scrnp, DisplayModePtr mode);
+Bool vgaHWSetRegCounts(ScrnInfoPtr scrp, int numCRTC, int numSequencer,
+                  	int numGraphics, int numAttribute);
+Bool vgaHWCopyReg(vgaRegPtr dst, vgaRegPtr src);
+Bool vgaHWGetHWRec(ScrnInfoPtr scrp);
+void vgaHWFreeHWRec(ScrnInfoPtr scrp);
+Bool vgaHWMapMem(ScrnInfoPtr scrp);
+void vgaHWUnmapMem(ScrnInfoPtr scrp);
+void vgaHWGetIOBase(vgaHWPtr hwp);
+void vgaHWLock(vgaHWPtr hwp);
+void vgaHWUnlock(vgaHWPtr hwp);
+void vgaHWEnable(vgaHWPtr hwp);
+void vgaHWDisable(vgaHWPtr hwp);
+void vgaHWDPMSSet(ScrnInfoPtr pScrn, int PowerManagementMode, int flags);
+Bool vgaHWHandleColormaps(ScreenPtr pScreen);
+void vgaHWddc1SetSpeed(ScrnInfoPtr pScrn, xf86ddcSpeed speed);
+CARD32 vgaHWHBlankKGA(DisplayModePtr mode, vgaRegPtr regp, int nBits, 
+	       unsigned int Flags);
+CARD32 vgaHWVBlankKGA(DisplayModePtr mode, vgaRegPtr regp, int nBits, 
+	       unsigned int Flags);
+Bool vgaHWAllocDefaultRegs(vgaRegPtr regp);
+#endif /* _VGAHW_H */
diff --git a/hw/xfree86/vgahw/vgaHWmodule.c b/hw/xfree86/vgahw/vgaHWmodule.c
new file mode 100644
index 000000000..409e7b511
--- /dev/null
+++ b/hw/xfree86/vgahw/vgaHWmodule.c
@@ -0,0 +1,27 @@
+/* $XFree86: xc/programs/Xserver/hw/xfree86/vgahw/vgaHWmodule.c,v 1.6 1999/01/26 05:54:18 dawes Exp $ */
+
+/*
+ * Copyright 1998 by The XFree86 Project, Inc
+ */
+
+#ifdef XFree86LOADER
+
+#include "xf86Module.h"
+
+
+static XF86ModuleVersionInfo VersRec = {
+	"vgahw",
+	MODULEVENDORSTRING,
+	MODINFOSTRING1,
+	MODINFOSTRING2,
+	XF86_VERSION_CURRENT,
+	0, 1, 0,
+	ABI_CLASS_VIDEODRV,
+	ABI_VIDEODRV_VERSION,
+	MOD_CLASS_NONE,
+	{0, 0, 0, 0}
+};
+
+XF86ModuleData vgahwModuleData = { &VersRec, NULL, NULL };
+
+#endif