Keep PCI mach64 only, drop:

- Chip < ATI_CHIP_88800GXC
- Chipset != ATI_CHIPSET_ATI
- Adapter != ATI_ADAPTER_MACH64

- depth < 8

28 files changed, 16 insertions, 726 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
index 0b70abd..4dcd708 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -141,7 +141,6 @@ EXTRA_DIST = \
 	atimach64xv.h \
 	atimode.h \
 	atimodule.h \
-	atimono.h \
 	atioption.h \
 	atipreinit.h \
 	atiprint.h \
diff --git a/src/atiadapter.c b/src/atiadapter.c
index b0b5580..8a597ef 100644
--- a/src/atiadapter.c
+++ b/src/atiadapter.c
@@ -32,25 +32,6 @@
 const char *ATIAdapterNames[] =
 {
     "Unknown",
-
-#ifndef AVOID_CPIO
-
-    "ATI EGA Wonder800",
-    "ATI EGA Wonder800+",
-    "IBM VGA or compatible",
-    "ATI VGA Basic16",
-    "ATI VGA Wonder V3",
-    "ATI VGA Wonder V4",
-    "ATI VGA Wonder V5",
-    "ATI VGA Wonder+",
-    "ATI VGA Wonder XL or XL24",
-    "ATI VGA Wonder VLB or PCI",
-    "IBM 8514/A or compatible",
-    "ATI Mach8",
-    "ATI Mach32",
-
-#endif /* AVOID_CPIO */
-
     "ATI Mach64",
     "ATI Rage128",
     "ATI Radeon"
diff --git a/src/atiadapter.h b/src/atiadapter.h
index 66a5e99..3ecd7bc 100644
--- a/src/atiadapter.h
+++ b/src/atiadapter.h
@@ -29,25 +29,6 @@
 typedef enum
 {
     ATI_ADAPTER_NONE = 0,
-
-#ifndef AVOID_CPIO
-
-    ATI_ADAPTER_EGA,
-    ATI_ADAPTER_EGA_PLUS,
-    ATI_ADAPTER_VGA,
-    ATI_ADAPTER_BASIC,
-    ATI_ADAPTER_V3,
-    ATI_ADAPTER_V4,
-    ATI_ADAPTER_V5,
-    ATI_ADAPTER_PLUS,
-    ATI_ADAPTER_XL,
-    ATI_ADAPTER_NONISA,
-    ATI_ADAPTER_8514A,
-    ATI_ADAPTER_MACH8,
-    ATI_ADAPTER_MACH32,
-
-#endif /* AVOID_CPIO */
-
     ATI_ADAPTER_MACH64,
     ATI_ADAPTER_RAGE128,
     ATI_ADAPTER_RADEON,
diff --git a/src/atiadjust.c b/src/atiadjust.c
index ef748e9..dfbd210 100644
--- a/src/atiadjust.c
+++ b/src/atiadjust.c
@@ -54,21 +54,6 @@ ATIAdjustPreInit
 {
     unsigned long MaxBase;
 
-#ifndef AVOID_CPIO
-
-    if ((pATI->CPIO_VGAWonder) &&
-        (pATI->Chip <= ATI_CHIP_18800_1) &&
-        (pATI->VideoRAM == 256) &&
-        (pATI->depth >= 8))
-    {
-        /* Strange, to say the least ... */
-        pATI->AdjustDepth = (pATI->bitsPerPixel + 3) >> 2;
-        pATI->AdjustMask = (unsigned long)(-32);
-    }
-    else
-
-#endif /* AVOID_CPIO */
-
     {
         pATI->AdjustDepth = (pATI->bitsPerPixel + 7) >> 3;
 
@@ -89,17 +74,11 @@ ATIAdjustPreInit
             if (pATI->Chip >= ATI_CHIP_264CT)
             {
                 pATI->AdjustMaxBase = MaxBits(CRTC_OFFSET_VGA) << 2;
-                if (pATI->depth <= 4)
-                    pATI->AdjustMaxBase <<= 1;
             }
             else if (!pATI->CPIO_VGAWonder)
             {
                 pATI->AdjustMaxBase = 0xFFFFU << 3;
             }
-            else if (pATI->Chip <= ATI_CHIP_28800_6)
-            {
-                pATI->AdjustMaxBase = 0x03FFFFU << 3;
-            }
             else /* Mach32 & Mach64 */
             {
                 pATI->AdjustMaxBase = 0x0FFFFFU << 3;
@@ -185,10 +164,6 @@ ATIAdjustFrame
 
         if (pATI->CPIO_VGAWonder)
         {
-            if (pATI->Chip <= ATI_CHIP_18800_1)
-                ATIModifyExtReg(pATI, 0xB0U, -1, 0x3FU, Base >> 10);
-            else
-            {
                 ATIModifyExtReg(pATI, 0xB0U, -1, 0xBFU, Base >> 10);
                 ATIModifyExtReg(pATI, 0xA3U, -1, 0xEFU, Base >> 13);
 
@@ -196,25 +171,10 @@ ATIAdjustFrame
                  * I don't know if this also applies to Mach64's, but give it a
                  * shot...
                  */
-                if (pATI->Chip >= ATI_CHIP_68800)
                     ATIModifyExtReg(pATI, 0xADU, -1, 0xF3U, Base >> 16);
-            }
         }
     }
     else
-    /*
-     * On integrated controllers, there is only one set of CRTC control bits,
-     * many of which are simultaneously accessible through both VGA and
-     * accelerator I/O ports.  Given VGA's architectural limitations, setting
-     * the CRTC's offset register to more than 256k needs to be done through
-     * the accelerator port.
-     */
-    if (pATI->depth <= 4)
-    {
-        outr(CRTC_OFF_PITCH, SetBits(pATI->displayWidth >> 4, CRTC_PITCH) |
-            SetBits(Base, CRTC_OFFSET));
-    }
-    else
 
 #endif /* AVOID_CPIO */
 
diff --git a/src/atibus.c b/src/atibus.c
index 3636b3b..a371dc4 100644
--- a/src/atibus.c
+++ b/src/atibus.c
@@ -40,13 +40,6 @@
 
 const char *ATIBusNames[] =
 {
-    "16-Bit ISA",
-    "EISA",
-    "16-Bit MicroChannel",
-    "32-Bit MicroChannel",
-    "386SX Local Bus",
-    "386DX Local Bus",
-    "VESA Local Bus",
     "PCI",
     "AGP"
 };
diff --git a/src/atibus.h b/src/atibus.h
index b719702..a02d8c5 100644
--- a/src/atibus.h
+++ b/src/atibus.h
@@ -38,13 +38,6 @@
  */
 typedef enum
 {
-    ATI_BUS_ISA = 0,
-    ATI_BUS_EISA,
-    ATI_BUS_MCA16,
-    ATI_BUS_MCA32,
-    ATI_BUS_SXLB,
-    ATI_BUS_DXLB,
-    ATI_BUS_VLB,
     ATI_BUS_PCI,
     ATI_BUS_AGP
 } ATIBusType;
diff --git a/src/atichip.c b/src/atichip.c
index 7b56bbc..ddc7e0a 100644
--- a/src/atichip.c
+++ b/src/atichip.c
@@ -36,27 +36,6 @@
 const char *ATIChipNames[] =
 {
     "Unknown",
-
-#ifndef AVOID_CPIO
-
-    "IBM VGA or compatible",
-    "ATI 18800",
-    "ATI 18800-1",
-    "ATI 28800-2",
-    "ATI 28800-4",
-    "ATI 28800-5",
-    "ATI 28800-6",
-    "IBM 8514/A",
-    "Chips & Technologies 82C480",
-    "ATI 38800-1",
-    "ATI 68800",
-    "ATI 68800-3",
-    "ATI 68800-6",
-    "ATI 68800LX",
-    "ATI 68800AX",
-
-#endif /* AVOID_CPIO */
-
     "ATI 88800GX-C",
     "ATI 88800GX-D",
     "ATI 88800GX-E",
@@ -410,23 +389,6 @@ ATIChipID
 {
     switch (ChipID)
     {
-
-#ifndef AVOID_CPIO
-
-        case OldChipID('A', 'A'):  case NewChipID('A', 'A'):
-            return ATI_CHIP_68800_3;
-
-        case OldChipID('X', 'X'):  case NewChipID('X', 'X'):
-            return ATI_CHIP_68800_6;
-
-        case OldChipID('L', 'X'):
-            return ATI_CHIP_68800LX;
-
-        case OldChipID('A', 'X'):  case NewChipID('A', 'X'):
-            return ATI_CHIP_68800AX;
-
-#endif /* AVOID_CPIO */
-
         case OldChipID('G', 'X'):  case NewChipID('G', 'X'):
             switch (ChipRev)
             {
diff --git a/src/atichip.h b/src/atichip.h
index 1b7ca2f..733c7b1 100644
--- a/src/atichip.h
+++ b/src/atichip.h
@@ -34,27 +34,6 @@
 typedef enum
 {
     ATI_CHIP_NONE = 0,
-
-#ifndef AVOID_CPIO
-
-    ATI_CHIP_VGA,               /* Generic VGA */
-    ATI_CHIP_18800,
-    ATI_CHIP_18800_1,
-    ATI_CHIP_28800_2,
-    ATI_CHIP_28800_4,
-    ATI_CHIP_28800_5,
-    ATI_CHIP_28800_6,
-    ATI_CHIP_8514A,             /* 8514/A */
-    ATI_CHIP_CT480,             /* 8514/A clone */
-    ATI_CHIP_38800_1,           /* Mach8 */
-    ATI_CHIP_68800,             /* Mach32 */
-    ATI_CHIP_68800_3,           /* Mach32 */
-    ATI_CHIP_68800_6,           /* Mach32 */
-    ATI_CHIP_68800LX,           /* Mach32 */
-    ATI_CHIP_68800AX,           /* Mach32 */
-
-#endif /* AVOID_CPIO */
-
     ATI_CHIP_88800GXC,          /* Mach64 */
     ATI_CHIP_88800GXD,          /* Mach64 */
     ATI_CHIP_88800GXE,          /* Mach64 */
diff --git a/src/aticlock.c b/src/aticlock.c
index 548cb62..727f80f 100644
--- a/src/aticlock.c
+++ b/src/aticlock.c
@@ -450,13 +450,6 @@ ATIMatchClockLine
     int MinimumGap = CLOCK_TOLERANCE + 1;
 
     /* For ATI adapters, reject generic VGA clocks */
-
-#ifndef AVOID_CPIO
-
-    if (pATI->Adapter != ATI_ADAPTER_VGA)
-
-#endif /* AVOID_CPIO */
-
     {
         if (ClockLine == SpecificationClockLine)
             ClockChipIndex++;
@@ -470,15 +463,6 @@ ATIMatchClockLine
     {
         int MaximumGap = 0, ClockCount = 0, ClockIndex = 0;
 
-#ifndef AVOID_CPIO
-
-        /* Only Mach64's and later can have programmable clocks */
-        if ((ClockChipIndex >= ATI_CLOCK_MACH64A) &&
-            (pATI->Adapter < ATI_ADAPTER_MACH64))
-            break;
-
-#endif /* AVOID_CPIO */
-
         for (;  ClockIndex < NumberOfClocks;  ClockIndex++)
         {
             int Gap, XF86ConfigClock, SpecificationClock;
@@ -517,15 +501,6 @@ ATIMatchClockLine
             break;
 
 SkipThisClockGenerator:;
-
-#ifndef AVOID_CPIO
-
-        /* For non-ATI adapters, only normalise standard VGA clocks */
-        if (pATI->Adapter == ATI_ADAPTER_VGA)
-            break;
-
-#endif /* AVOID_CPIO */
-
     }
 
     return ClockChip;
@@ -660,49 +635,7 @@ ATIClockPreInit
      */
 ProbeClocks:
 
-#ifndef AVOID_CPIO
-
-    if (pATI->Adapter == ATI_ADAPTER_VGA)
     {
-        NumberOfDividers = 1;
-        NumberOfUndividedClocks = 4;
-        CalibrationClockNumber = 1;
-        CalibrationClockValue = 28322;
-    }
-    else
-
-#endif /* AVOID_CPIO */
-
-    {
-
-#ifndef AVOID_CPIO
-
-        NumberOfDividers = 4;
-        if ((pATI->Chip <= ATI_CHIP_18800) ||
-            (pATI->Adapter == ATI_ADAPTER_V4))
-        {
-            NumberOfUndividedClocks = 8;
-            /* Actually, any undivided clock will do */
-            CalibrationClockNumber = 1;
-            CalibrationClockValue = 56644;
-        }
-        else
-
-#endif /* AVOID_CPIO */
-
-        {
-            NumberOfUndividedClocks = 16;
-
-#ifndef AVOID_CPIO
-
-            CalibrationClockNumber = 7;
-            CalibrationClockValue = 36000;
-            if (pATI->Chip >= ATI_CHIP_68800)
-
-#endif /* AVOID_CPIO */
-
-            {
-                NumberOfDividers = 2;
                 if (pATI->Chip >= ATI_CHIP_264CT)
                 {
                     NumberOfDividers = 1;
@@ -711,14 +644,9 @@ ProbeClocks:
                     CalibrationClockValue = 28322;
                 }
                 else
-
-#ifndef AVOID_CPIO
-
-                if (pATI->Adapter >= ATI_ADAPTER_MACH64)
-
-#endif /* AVOID_CPIO */
-
                 {
+                    NumberOfDividers = 2;
+                    NumberOfUndividedClocks = 16;
                     CalibrationClockNumber = 10 /* or 11 */;
                     CalibrationClockValue = 75000 /* or 65000 */;
                 }
@@ -743,8 +671,6 @@ ProbeClocks:
                     pATI->NewHW.ClockMap = ATIAcceleratorClockMap;
                     pATI->NewHW.ClockUnmap = ATIAcceleratorClockUnmap;
                 }
-            }
-        }
     }
 
     pATI->OldHW.ClockMap = pATI->NewHW.ClockMap;
@@ -829,31 +755,12 @@ ProbeClocks:
 
                     if (pATI->CPIO_VGAWonder)
                     {
-                        /*
-                         * On adapters with crystals, switching to one of the
-                         * spare assignments doesn't do anything (i.e. the
-                         * previous setting remains in effect).  So, disable
-                         * their selection.
-                         */
-                        if (((Index & 0x03U) == 0x02U) &&
-                            ((pATI->Chip <= ATI_CHIP_18800) ||
-                             (pATI->Adapter == ATI_ADAPTER_V4)))
-                            continue;
-
                         /* Start sequencer reset */
                         PutReg(SEQX, 0x00U, 0x00U);
 
-                        /* Set high-order bits */
-                        if (pATI->Chip <= ATI_CHIP_18800)
-                        {
-                            ATIModifyExtReg(pATI, 0xB2U, -1, 0xBFU,
-                                Index << 4);
-                        }
-                        else
                         {
                             ATIModifyExtReg(pATI, 0xBEU, -1, 0xEFU,
                                 Index << 2);
-                            if (pATI->Adapter != ATI_ADAPTER_V4)
                             {
                                 Index >>= 1;
                                 ATIModifyExtReg(pATI, 0xB9U, -1, 0xFDU,
@@ -1020,19 +927,6 @@ ProbeClocks:
             SpecificationClockLine, NumberOfUndividedClocks,
             CalibrationClockNumber, 0);
 
-#ifndef AVOID_CPIO
-
-        if ((pATI->Chip <= ATI_CHIP_18800) ||
-            (pATI->Adapter == ATI_ADAPTER_V4))
-        {
-            /* V3 and V4 adapters don't have clock chips */
-            if (pATI->Clock > ATI_CLOCK_CRYSTALS)
-                pATI->Clock = ATI_CLOCK_NONE;
-        }
-        else
-
-#endif /* AVOID_CPIO */
-
         {
             /* All others don't have crystals */
             if (pATI->Clock == ATI_CLOCK_CRYSTALS)
@@ -1061,12 +955,6 @@ ProbeClocks:
         pATI->Clock = ATIMatchClockLine(pScreenInfo, pATI,
             SpecificationClockLine, NumberOfUndividedClocks, -1, 0);
 
-#ifndef AVOID_CPIO
-
-        if (pATI->Adapter != ATI_ADAPTER_VGA)
-
-#endif /* AVOID_CPIO */
-
         {
             if (pATI->Clock == ATI_CLOCK_NONE)
             {
@@ -1081,14 +969,6 @@ ProbeClocks:
                     pATI->OptionProbeClocks = TRUE;
                 }
                 else
-
-#ifndef AVOID_CPIO
-
-                if ((pATI->Chip >= ATI_CHIP_18800) &&
-                    (pATI->Adapter != ATI_ADAPTER_V4))
-
-#endif /* AVOID_CPIO */
-
                 {
                     /*
                      * Check for clocks that are specified in the wrong order.
@@ -1113,19 +993,6 @@ ProbeClocks:
             }
             else
             /* Ensure crystals are not matched to clock chips, and vice versa */
-
-#ifndef AVOID_CPIO
-
-            if ((pATI->Chip <= ATI_CHIP_18800) ||
-                (pATI->Adapter == ATI_ADAPTER_V4))
-            {
-                if (pATI->Clock > ATI_CLOCK_CRYSTALS)
-                    pATI->OptionProbeClocks = TRUE;
-            }
-            else
-
-#endif /* AVOID_CPIO */
-
             {
                 if (pATI->Clock == ATI_CLOCK_CRYSTALS)
                     pATI->OptionProbeClocks = TRUE;
@@ -1277,11 +1144,6 @@ ATIClockSave
 
 #ifndef AVOID_CPIO
 
-        else if (pATI->Chip < ATI_CHIP_68800)
-        {
-            pATIHW->ClockMap = ATIVGAWonderClockMap;
-            pATIHW->ClockUnmap = ATIVGAWonderClockUnmap;
-        }
         else
         {
             pATIHW->ClockMap = ATIMachVGAClockMap;
@@ -1426,16 +1288,9 @@ ATIClockCalculate
             if (pATI->CPIO_VGAWonder)
             {
                 /* Set ATI clock select bits */
-                if (pATI->Chip <= ATI_CHIP_18800)
-                {
-                    pATIHW->b2 = (pATIHW->b2 & 0xBFU) |
-                        ((ClockSelect << 4) & 0x40U);
-                }
-                else
                 {
                     pATIHW->be = (pATIHW->be & 0xEFU) |
                         ((ClockSelect << 2) & 0x10U);
-                    if (pATI->Adapter != ATI_ADAPTER_V4)
                     {
                         ClockSelect >>= 1;
                         pATIHW->b9 = (pATIHW->b9 & 0xFDU) |
diff --git a/src/aticonsole.c b/src/aticonsole.c
index 5e06578..4a7ed1d 100644
--- a/src/aticonsole.c
+++ b/src/aticonsole.c
@@ -46,12 +46,6 @@
 #include "atidri.h"
 #endif
 
-#include "mach64_common.h"
-
-
-
-#include "xf86.h"
-
 #ifdef TV_OUT
 
 #include "atichip.h"
@@ -147,11 +141,6 @@ ATISetDPMSMode
 
             /* Assume EGA/VGA */
             ATIVGASetDPMSMode(pATI, DPMSMode);
-            break;
-
-        case ATI_ADAPTER_NONE:
-        case ATI_ADAPTER_8514A:
-        case ATI_ADAPTER_MACH8:
 
 #endif /* AVOID_CPIO */
 
diff --git a/src/atidac.c b/src/atidac.c
index 95b478d..3153377 100644
--- a/src/atidac.c
+++ b/src/atidac.c
@@ -29,7 +29,6 @@
 #include "ati.h"
 #include "atidac.h"
 #include "atimach64io.h"
-#include "atimono.h"
 
 /*
  * RAMDAC-related definitions.
@@ -189,41 +188,6 @@ ATIDACPreInit
 
 #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 */
diff --git a/src/atidga.c b/src/atidga.c
index 5367610..d866e36 100644
--- a/src/atidga.c
+++ b/src/atidga.c
@@ -422,7 +422,7 @@ ATIDGAInit
          * banked framebuffers.  Also, disable DGA when non-DGA server modes
          * are planar.
          */
-        if (pATI->BankInfo.BankSize || (pScreenInfo->depth <= 4))
+        if (pATI->BankInfo.BankSize)
             return FALSE;
 
 #endif /* AVOID_CPIO */
@@ -459,8 +459,7 @@ ATIDGAInit
         ATIDGAAddModes(pScreenInfo, pATI, flags,
             8, 8, 0, 0, 0, PseudoColor);
 
-        if ((pATI->Chip >= ATI_CHIP_264CT) &&
-            (pATI->Chipset == ATI_CHIPSET_ATI))
+        if ((pATI->Chip >= ATI_CHIP_264CT))
         {
             ATIDGAAddModes(pScreenInfo, pATI, flags,
                 15, 16, 0x7C00U, 0x03E0U, 0x001FU, TrueColor);
diff --git a/src/atidsp.c b/src/atidsp.c
index 6692425..8e8ddd9 100644
--- a/src/atidsp.c
+++ b/src/atidsp.c
@@ -222,12 +222,6 @@ ATIDSPCalculate
         pATI->ClockDescriptor.PostDividers[pATIHW->PostDivider];
     Divider = pATIHW->FeedbackDivider * pATI->XCLKReferenceDivider;
 
-#ifndef AVOID_CPIO
-
-    if (pATI->depth >= 8)
-
-#endif /* AVOID_CPIO */
-
     {
         Divider *= pATI->bitsPerPixel / 4;
     }
diff --git a/src/atiident.c b/src/atiident.c
index dfbe1e7..14bd966 100644
--- a/src/atiident.c
+++ b/src/atiident.c
@@ -35,18 +35,6 @@
 const char *ATIChipsetNames[] =
 {
     "ati",
-
-#ifndef AVOID_CPIO
-
-    "ativga",
-    "ibmvga",
-    "ibm8514",
-    "vgawonder",
-    "mach8",
-    "mach32",
-
-#endif /* AVOID_CPIO */
-
     "mach64",
     "rage128",
     "radeon"
@@ -55,19 +43,6 @@ const char *ATIChipsetNames[] =
 static SymTabRec ATIPublicChipsetNames[] =
 {
     {ATI_CHIPSET_ATI, "ati"},
-
-#ifndef AVOID_CPIO
-
-    {ATI_CHIPSET_ATIVGA, "ativga"},
-#ifdef __MAYBE_NOT__
-    {ATI_CHIPSET_IBMVGA, "ibmvga"},
-#endif
-#ifdef __NOT_YET__
-    {ATI_CHIPSET_IBM8514, "ibm8514"},
-#endif
-
-#endif /* AVOID_CPIO */
-
     {-1, NULL}
 };
 
@@ -107,17 +82,6 @@ ATIIdentProbe
 
     static SymTabRec SpecificNames[] =
     {
-
-#ifndef AVOID_CPIO
-
-        {ATI_CHIPSET_VGAWONDER, "vgawonder"},
-#ifdef __NOT_YET__
-        {ATI_CHIPSET_MACH8, "mach8"},
-#endif
-        {ATI_CHIPSET_MACH32, "mach32"},
-
-#endif /* AVOID_CPIO */
-
         {ATI_CHIPSET_MACH64, "mach64"},
         {ATI_CHIPSET_RAGE128, "rage128"},
         {ATI_CHIPSET_RADEON, "radeon"},
diff --git a/src/atiident.h b/src/atiident.h
index 84777e0..ca488c9 100644
--- a/src/atiident.h
+++ b/src/atiident.h
@@ -26,18 +26,6 @@
 typedef enum
 {
     ATI_CHIPSET_ATI,
-
-#ifndef AVOID_CPIO
-
-    ATI_CHIPSET_ATIVGA,
-    ATI_CHIPSET_IBMVGA,
-    ATI_CHIPSET_IBM8514,
-    ATI_CHIPSET_VGAWONDER,
-    ATI_CHIPSET_MACH8,
-    ATI_CHIPSET_MACH32,
-
-#endif /* AVOID_CPIO */
-
     ATI_CHIPSET_MACH64,
     ATI_CHIPSET_RAGE128,
     ATI_CHIPSET_RADEON,
diff --git a/src/atiload.c b/src/atiload.c
index aa36d46..0001ced 100644
--- a/src/atiload.c
+++ b/src/atiload.c
@@ -62,22 +62,6 @@ const char *ATIvbeSymbols[] =
     NULL
 };
 
-#ifndef AVOID_CPIO
-
-const char *ATIxf1bppSymbols[] =
-{
-    "xf1bppScreenInit",
-    NULL
-};
-
-const char *ATIxf4bppSymbols[] =
-{
-    "xf4bppScreenInit",
-    NULL
-};
-
-#endif /* AVOID_CPIO */
-
 #ifdef XF86DRI_DEVEL
 
 const char *ATIdrmSymbols[] = {
@@ -228,19 +212,6 @@ ATILoadModules
     /* Load depth-specific entry points */
     switch (pATI->bitsPerPixel)
     {
-
-#ifndef AVOID_CPIO
-
-        case 1:
-            fbPtr = ATILoadModule(pScreenInfo, "xf1bpp", ATIxf1bppSymbols);
-            break;
-
-        case 4:
-            fbPtr = ATILoadModule(pScreenInfo, "xf4bpp", ATIxf4bppSymbols);
-            break;
-
-#endif /* AVOID_CPIO */
-
         case 8:
         case 16:
         case 24:
diff --git a/src/atiload.h b/src/atiload.h
index ac8fa15..ebccd75 100644
--- a/src/atiload.h
+++ b/src/atiload.h
@@ -34,12 +34,6 @@
 
 extern const char *ATIint10Symbols[], *ATIddcSymbols[], *ATIvbeSymbols[],
 
-#ifndef AVOID_CPIO
-
-                  *ATIxf1bppSymbols[], *ATIxf4bppSymbols[],
-
-#endif /* AVOID_CPIO */
-
 #ifdef XF86DRI_DEVEL
  
                   *ATIdrmSymbols[], *ATIdriSymbols[],
diff --git a/src/atilock.c b/src/atilock.c
index 92293af..b4babb1 100644
--- a/src/atilock.c
+++ b/src/atilock.c
@@ -55,12 +55,6 @@ ATIUnlock
         return;
     pATI->Unlocked = TRUE;
 
-#ifndef AVOID_CPIO
-
-    if (pATI->Chip >= ATI_CHIP_88800GXC)
-
-#endif /* AVOID_CPIO */
-
     {
         /* Reset everything */
         pATI->LockData.bus_cntl = inr(BUS_CNTL);
@@ -182,11 +176,10 @@ ATIUnlock
                 }
             }
         }
+    }
 
 #ifndef AVOID_CPIO
 
-    }
-
     if (pATI->VGAAdapter != ATI_ADAPTER_NONE)
     {
         if (pATI->CPIO_VGAWonder)
@@ -207,11 +200,9 @@ ATIUnlock
             ATIModifyExtReg(pATI, 0xB8U, pATI->LockData.b8, 0xC0U, 0x00U);
             pATI->LockData.b9 = ATIGetExtReg(0xB9U);
             ATIModifyExtReg(pATI, 0xB9U, pATI->LockData.b9, 0x7FU, 0x00U);
-            if (pATI->Chip > ATI_CHIP_18800)
             {
                 pATI->LockData.be = ATIGetExtReg(0xBEU);
                 ATIModifyExtReg(pATI, 0xBEU, pATI->LockData.be, 0xFAU, 0x01U);
-                if (pATI->Chip >= ATI_CHIP_28800_2)
                 {
                     pATI->LockData.a6 = ATIGetExtReg(0xA6U);
                     ATIModifyExtReg(pATI, 0xA6U, pATI->LockData.a6,
@@ -380,10 +371,10 @@ ATIUnlock
                 out8(LCD_INDEX, GetByte(pATI->LockData.lcd_index, 0));
             }
         }
+    }
 
 #endif /* AVOID_CPIO */
 
-    }
 }
 
 /*
@@ -482,10 +473,8 @@ ATILock
             ATIModifyExtReg(pATI, 0xB6U, -1, 0xDDU, pATI->LockData.b6);
             ATIModifyExtReg(pATI, 0xB8U, -1, 0xC0U, pATI->LockData.b8 & 0x03U);
             ATIModifyExtReg(pATI, 0xB9U, -1, 0x7FU, pATI->LockData.b9);
-            if (pATI->Chip > ATI_CHIP_18800)
             {
                 ATIModifyExtReg(pATI, 0xBEU, -1, 0xFAU, pATI->LockData.be);
-                if (pATI->Chip >= ATI_CHIP_28800_2)
                 {
                     ATIModifyExtReg(pATI, 0xA6U, -1, 0x7FU, pATI->LockData.a6);
                     ATIModifyExtReg(pATI, 0xABU, -1, 0xE7U, pATI->LockData.ab);
@@ -495,8 +484,6 @@ ATILock
         }
     }
 
-    if (pATI->Chip >= ATI_CHIP_88800GXC)
-
 #endif /* AVOID_CPIO */
 
     {
diff --git a/src/atimach64.c b/src/atimach64.c
index 38e0de2..8675bdf 100644
--- a/src/atimach64.c
+++ b/src/atimach64.c
@@ -84,16 +84,6 @@ ATIMach64PreInit
 {
     CARD32 bus_cntl, config_cntl;
 
-#ifndef AVOID_CPIO
-
-    if (pATI->depth <= 4)
-    {
-        pATIHW->crtc_off_pitch = SetBits(pATI->displayWidth >> 4, CRTC_PITCH);
-    }
-    else
-
-#endif /* AVOID_CPIO */
-
     {
         pATIHW->crtc_off_pitch = SetBits(pATI->displayWidth >> 3, CRTC_PITCH);
     }
@@ -722,19 +712,6 @@ ATIMach64Calculate
         CRTC_EXT_DISP_EN | CRTC_EN | CRTC_VGA_LINEAR | CRTC_CNT_EN;
     switch (pATI->depth)
     {
-
-#ifndef AVOID_CPIO
-
-        case 1:
-            pATIHW->crtc_gen_cntl |= SetBits(PIX_WIDTH_1BPP, CRTC_PIX_WIDTH);
-            break;
-
-        case 4:
-            pATIHW->crtc_gen_cntl |= SetBits(PIX_WIDTH_4BPP, CRTC_PIX_WIDTH);
-            break;
-
-#endif /* AVOID_CPIO */
-
         case 8:
             pATIHW->crtc_gen_cntl |= SetBits(PIX_WIDTH_8BPP, CRTC_PIX_WIDTH);
             break;
diff --git a/src/atimisc.c b/src/atimisc.c
index 8670112..e6012ec 100644
--- a/src/atimisc.c
+++ b/src/atimisc.c
@@ -110,13 +110,6 @@ ATISetup
             ATIddcSymbols,
             ATIvbeSymbols,
 
-#ifndef AVOID_CPIO
-
-            ATIxf1bppSymbols,
-            ATIxf4bppSymbols,
-
-#endif /* AVOID_CPIO */
-
 #ifdef XF86DRI_DEVEL
 
             ATIdrmSymbols,
diff --git a/src/atimono.h b/src/atimono.h
deleted file mode 100644
index 7830e5e..0000000
--- a/src/atimono.h
+++ /dev/null
@@ -1,42 +0,0 @@
-/*
- * 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.
- */
-
-#ifndef ___ATIMONO_H___
-#define ___ATIMONO_H___ 1
-
-#ifndef BIT_PLANE
-#   define BIT_PLANE 3
-#endif
-
-#ifndef MONO_BLACK
-#   define MONO_BLACK 0x00U
-#endif
-
-#ifndef MONO_WHITE
-#   define MONO_WHITE 0x3FU
-#endif
-
-#ifndef MONO_OVERSCAN
-#   define MONO_OVERSCAN 0x01U
-#endif
-
-#endif /* ___ATIMONO_H___ */
diff --git a/src/atiprint.c b/src/atiprint.c
index 247252d..1fc629d 100644
--- a/src/atiprint.c
+++ b/src/atiprint.c
@@ -365,7 +365,7 @@ ATIPrintRegisters
 
 #ifndef AVOID_CPIO
 
-    CARD8 genmo, seq1 = 0;
+    CARD8 genmo;
 
     crtc = ATI_CRTC_VGA;
 
@@ -469,8 +469,7 @@ ATIPrintRegisters
         ATIPrintIndexedRegisters(SEQX, 0, 8, "Sequencer", 0);
 
         if (pATI->CPIO_VGAWonder)
-            ATIPrintIndexedRegisters(pATI->CPIO_VGAWonder,
-                xf86ServerIsOnlyProbing() ? 0x80U : pATI->VGAOffset, 0xC0U,
+            ATIPrintIndexedRegisters(pATI->CPIO_VGAWonder, 0x80U, 0xC0U,
                 "ATI extended VGA", 0);
     }
 
@@ -540,13 +539,6 @@ ATIPrintRegisters
         xf86ErrorFVerb(4, "\n");
     }
     else
-
-#ifndef AVOID_CPIO
-
-    if (pATI->Chip >= ATI_CHIP_88800GXC)
-
-#endif /* AVOID_CPIO */
-
     {
 
 #ifdef AVOID_CPIO
@@ -609,14 +601,6 @@ ATIPrintRegisters
 
     ATISetDACIOPorts(pATI, crtc);
 
-    /* Temporarily turn off CLKDIV2 while reading DAC's LUT */
-    if (pATI->Adapter == ATI_ADAPTER_NONISA)
-    {
-        seq1 = GetReg(SEQX, 0x01U);
-        if (seq1 & 0x08U)
-            PutReg(SEQX, 0x01U, seq1 & ~0x08U);
-    }
-
     dac_read = inb(pATI->CPIO_DAC_READ);
     DACDelay;
     dac_write = inb(pATI->CPIO_DAC_WRITE);
@@ -653,9 +637,6 @@ ATIPrintRegisters
     outb(pATI->CPIO_DAC_READ, dac_read);
     DACDelay;
 
-    if ((pATI->Adapter == ATI_ADAPTER_NONISA) && (seq1 & 0x08U))
-        PutReg(SEQX, 0x01U, seq1);
-
 #endif /* AVOID_CPIO */
 
     if ((pVideo = pATI->PCIInfo))
diff --git a/src/atiprobe.c b/src/atiprobe.c
index 29ec544..dcd46cd 100644
--- a/src/atiprobe.c
+++ b/src/atiprobe.c
@@ -226,8 +226,7 @@ ATIVGAWonderProbe
             {
                 /* Set up extended VGA register addressing */
                 PutReg(GRAX, 0x50U, GetByte(pATI->CPIO_VGAWonder, 0));
-                PutReg(GRAX, 0x51U,
-                    GetByte(pATI->CPIO_VGAWonder, 1) | pATI->VGAOffset);
+                PutReg(GRAX, 0x51U, GetByte(pATI->CPIO_VGAWonder, 1) | 0x80U);
             }
             /*
              * Register 0xBB is used by the BIOS to keep track of various
@@ -243,10 +242,7 @@ ATIVGAWonderProbe
             ATIPutExtReg(0xBBU, IOValue3 ^ 0x55U);
             IOValue5 = ATIGetExtReg(0xBBU);
             ATIPutExtReg(0xBBU, IOValue3);
-            if (pATI->Chip <= ATI_CHIP_18800_1)
-                IOValue6 = 0;
-            else
-                IOValue6 = ATIGetExtReg(0xBCU);
+            IOValue6 = ATIGetExtReg(0xBCU);
             ATIPutExtReg(IOValue1, IOValue2);
 
             if ((IOValue4 == (IOValue3 ^ 0xAAU)) &&
@@ -496,7 +492,6 @@ ATIMach64Probe
         {
             pATI->VGAAdapter = ATI_ADAPTER_MACH64;
             pATI->CPIO_VGAWonder = 0x01CEU;
-            pATI->VGAOffset = 0x80U;
         }
     }
 
@@ -1012,15 +1007,6 @@ ATIProbe
         {
             pATI = ATIPtrs[i];
 
-#ifndef AVOID_CPIO
-
-            if ((pATI->Adapter != ATI_ADAPTER_VGA) &&
-                ((pATI->Adapter != ATI_ADAPTER_8514A) ||
-                 ((pATI->VGAAdapter != ATI_ADAPTER_VGA) &&
-                  (pATI->VGAAdapter != ATI_ADAPTER_NONE))))
-
-#endif /* AVOID_CPIO */
-
             {
                 ProbeSuccess = TRUE;
                 pGDev = xf86AddDeviceToConfigure(ATI_DRIVER_NAME,
@@ -1062,51 +1048,8 @@ ATIProbe
                 switch (pATIGDev->Chipset)
                 {
                     case ATI_CHIPSET_ATI:
-
-#ifndef AVOID_CPIO
-
-                        if (pATI->Adapter == ATI_ADAPTER_VGA)
-                            continue;
-                        if (pATI->Adapter != ATI_ADAPTER_8514A)
-                            break;
-                        /* Fall through */
-
-                    case ATI_CHIPSET_ATIVGA:
-                        if (pATI->VGAAdapter == ATI_ADAPTER_VGA)
-                            continue;
-                        /* Fall through */
-
-                    case ATI_CHIPSET_IBMVGA:
-                        if (pATI->VGAAdapter == ATI_ADAPTER_NONE)
-                            continue;
-                        break;
-
-                    case ATI_CHIPSET_VGAWONDER:
-                        if (!pATI->CPIO_VGAWonder)
-                            continue;
-                        break;
-
-                    case ATI_CHIPSET_IBM8514:
-                        if (pATI->Adapter == ATI_ADAPTER_8514A)
-                            break;
-                        /* Fall through */
-
-                    case ATI_CHIPSET_MACH8:
-                        if (pATI->Adapter == ATI_ADAPTER_MACH8)
-                            break;
-                        /* Fall through */
-
-                    case ATI_CHIPSET_MACH32:
-                        if (pATI->Adapter == ATI_ADAPTER_MACH32)
-                            break;
-                        continue;
-
-#endif /* AVOID_CPIO */
-
                     case ATI_CHIPSET_MACH64:
-                        if (pATI->Adapter == ATI_ADAPTER_MACH64)
-                            break;
-                        continue;
+                        break;
 
                     default:
                         continue;
@@ -1322,12 +1265,6 @@ ATIProbe
             if (!(pATI = ATIPtrs[i]))
                 continue;
 
-#ifndef AVOID_CPIO
-
-            if (pATI->Adapter > ATI_ADAPTER_VGA)
-
-#endif /* AVOID_CPIO */
-
             {
                 if (pATI->iEntity < 0)
                     (void)ATIClaimBusSlot(pDriver, 0, NULL, FALSE, pATI);
diff --git a/src/atiscreen.c b/src/atiscreen.c
index ca41ff1..b9984ae 100644
--- a/src/atiscreen.c
+++ b/src/atiscreen.c
@@ -61,9 +61,6 @@
 #include "shadowfb.h"
 #include "xf86cmap.h"
 
-#include "xf1bpp.h"
-#include "xf4bpp.h"
-
 #include "fb.h"
 
 #include "mibank.h"
@@ -457,23 +454,6 @@ ATIScreenInit
     /* Initialise framebuffer layer */
     switch (pATI->bitsPerPixel)
     {
-
-#ifndef AVOID_CPIO
-
-        case 1:
-            pATI->Closeable = xf1bppScreenInit(pScreen, pFB,
-                pScreenInfo->virtualX, pScreenInfo->virtualY,
-                pScreenInfo->xDpi, pScreenInfo->yDpi, pATI->displayWidth);
-            break;
-
-        case 4:
-            pATI->Closeable = xf4bppScreenInit(pScreen, pFB,
-                pScreenInfo->virtualX, pScreenInfo->virtualY,
-                pScreenInfo->xDpi, pScreenInfo->yDpi, pATI->displayWidth);
-            break;
-
-#endif /* AVOID_CPIO */
-
         case 8:
         case 16:
         case 24:
@@ -512,7 +492,6 @@ ATIScreenInit
     }
 
     /* If applicable, initialise RENDER extension */
-    if (pATI->bitsPerPixel > 4)
     {
         if (pATI->OptionShadowFB)
         {
@@ -612,24 +591,11 @@ ATIScreenInit
     if (!miCreateDefColormap(pScreen))
         return FALSE;
 
-#ifdef AVOID_CPIO
-
     if (!xf86HandleColormaps(pScreen, 256, pATI->rgbBits, ATILoadPalette, NULL,
                              CMAP_PALETTED_TRUECOLOR |
                              CMAP_LOAD_EVEN_IF_OFFSCREEN))
             return FALSE;
 
-#else /* AVOID_CPIO */
-
-    if (pATI->depth > 1)
-        if (!xf86HandleColormaps(pScreen, (pATI->depth == 4) ? 16 : 256,
-                                 pATI->rgbBits, ATILoadPalette, NULL,
-                                 CMAP_PALETTED_TRUECOLOR |
-                                 CMAP_LOAD_EVEN_IF_OFFSCREEN))
-            return FALSE;
-
-#endif /* AVOID_CPIO */
-
     /* Initialise shadow framebuffer */
     if (pATI->OptionShadowFB &&
         !ShadowFBInit(pScreen, ATIRefreshArea))
diff --git a/src/atistruct.h b/src/atistruct.h
index 698ec01..0476f04 100644
--- a/src/atistruct.h
+++ b/src/atistruct.h
@@ -256,7 +256,6 @@ typedef struct _ATIRec
      */
     IOADDRESS CPIO_VGAWonder;
     CARD8 B2Reg;        /* The B2 mirror */
-    CARD8 VGAOffset;    /* Low index for CPIO_VGAWonder */
 
 #endif /* AVOID_CPIO */
 
diff --git a/src/ativga.c b/src/ativga.c
index 7332431..fc50d02 100644
--- a/src/ativga.c
+++ b/src/ativga.c
@@ -27,7 +27,6 @@
 #include "ati.h"
 #include "atiadapter.h"
 #include "atichip.h"
-#include "atimono.h"
 #include "atistruct.h"
 #include "ativga.h"
 #include "ativgaio.h"
@@ -56,65 +55,30 @@ ATIVGAPreInit
 
     /* Initialise sequencer register values */
     pATIHW->seq[0] = 0x03U;
-    if (pATI->depth == 1)
-        pATIHW->seq[2] = 0x01U << BIT_PLANE;
-    else
         pATIHW->seq[2] = 0x0FU;
-    if (pATI->depth <= 4)
-        pATIHW->seq[4] = 0x06U;
-    else if (pATI->Adapter == ATI_ADAPTER_VGA)
-        pATIHW->seq[4] = 0x0EU;
-    else
         pATIHW->seq[4] = 0x0AU;
 
     /* Initialise CRTC register values */
-    if ((pATI->depth >= 8) &&
-        ((pATI->Chip >= ATI_CHIP_264CT) ||
-         (pATI->CPIO_VGAWonder &&
-          (pATI->Chip <= ATI_CHIP_18800_1) &&
-          (pATI->VideoRAM == 256))))
+    if (((pATI->Chip >= ATI_CHIP_264CT)))
         pATIHW->crt[19] = pATI->displayWidth >> 3;
     else
         pATIHW->crt[19] = pATI->displayWidth >> 4;
-    if ((pATI->depth >= 8) && (pATI->Adapter == ATI_ADAPTER_VGA))
-        pATIHW->crt[23] = 0xC3U;
-    else
+
         pATIHW->crt[23] = 0xE3U;
     pATIHW->crt[24] = 0xFFU;
 
     /* Initialise attribute controller register values */
-    if (pATI->depth == 1)
-    {
-        Bool FlipPixels = xf86GetFlipPixels();
-
-        for (Index = 0;  Index < 16;  Index++)
-            if (((Index & (0x01U << BIT_PLANE)) != 0) != FlipPixels)
-                pATIHW->attr[Index] = MONO_WHITE;
-            else
-                pATIHW->attr[Index] = MONO_BLACK;
-        pATIHW->attr[16] = 0x01U;
-        pATIHW->attr[17] = MONO_OVERSCAN;
-    }
-    else
     {
         for (Index = 0;  Index < 16;  Index++)
             pATIHW->attr[Index] = Index;
-        if (pATI->depth <= 4)
-            pATIHW->attr[16] = 0x81U;
-        else if (pATI->Adapter == ATI_ADAPTER_VGA)
-            pATIHW->attr[16] = 0x41U;
-        else
+
             pATIHW->attr[16] = 0x01U;
         pATIHW->attr[17] = 0xFFU;
     }
     pATIHW->attr[18] = 0x0FU;
 
     /* Initialise graphics controller register values */
-    if (pATI->depth == 1)
-        pATIHW->gra[4] = BIT_PLANE;
-    else if (pATI->depth <= 4)
-        pATIHW->gra[5] = 0x02U;
-    else if (pATI->Chip >= ATI_CHIP_264CT)
+    if (pATI->Chip >= ATI_CHIP_264CT)
         pATIHW->gra[5] = 0x40U;
     if (pATI->UseSmallApertures && (pATI->Chip >= ATI_CHIP_264CT) &&
         ((pATI->Chip >= ATI_CHIP_264VT) || !pATI->LinearBase))
diff --git a/src/atiwonder.c b/src/atiwonder.c
index 6822872..371e251 100644
--- a/src/atiwonder.c
+++ b/src/atiwonder.c
@@ -74,21 +74,12 @@ ATIVGAWonderPreInit
 )
 {
     pATIHW->b3 = ATIGetExtReg(0xB3U) & 0x20U;
-    if (pATI->depth <= 4)
-        pATIHW->b6 = 0x40U;
-    else
         pATIHW->b6 = 0x04U;
-    if (pATI->Chip <= ATI_CHIP_18800)
-        pATIHW->ba = 0x08U;
-    else if (pATI->Chip >= ATI_CHIP_28800_2)
-    {
-        if (pATI->VideoRAM > 256)
-            pATIHW->b6 |= 0x01U;
+        pATIHW->b6 |= 0x01U;
         pATIHW->bf = ATIGetExtReg(0xBFU) & 0x5FU;
         pATIHW->a3 = ATIGetExtReg(0xA3U) & 0x67U;
         pATIHW->ab = ATIGetExtReg(0xABU) & 0xE7U;
         pATIHW->ae = ATIGetExtReg(0xAEU) & 0xE0U;
-    }
 }
 
 /*
@@ -114,10 +105,8 @@ ATIVGAWonderSave
     pATIHW->b9 = ATIGetExtReg(0xB9U);
     pATIHW->ba = ATIGetExtReg(0xBAU);
     pATIHW->bd = ATIGetExtReg(0xBDU);
-    if (pATI->Chip > ATI_CHIP_18800)
     {
         pATIHW->be = ATIGetExtReg(0xBEU);
-        if (pATI->Chip >= ATI_CHIP_28800_2)
         {
             pATIHW->bf = ATIGetExtReg(0xBFU);
             pATIHW->a3 = ATIGetExtReg(0xA3U);
@@ -143,12 +132,8 @@ ATIVGAWonderSet
     ATIHWPtr    pATIHW
 )
 {
-    if (pATI->Chip <= ATI_CHIP_18800)
-        ATIModifyExtReg(pATI, 0xB2U, -1, 0x00U, pATIHW->b2);
-    else
     {
         ATIModifyExtReg(pATI, 0xBEU, -1, 0x00U, pATIHW->be);
-        if (pATI->Chip >= ATI_CHIP_28800_2)
         {
             ATIModifyExtReg(pATI, 0xBFU, -1, 0x00U, pATIHW->bf);
             ATIModifyExtReg(pATI, 0xA3U, -1, 0x00U, pATIHW->a3);
diff --git a/src/atiwonderio.c b/src/atiwonderio.c
index 79293d8..e6c0db7 100644
--- a/src/atiwonderio.c
+++ b/src/atiwonderio.c
@@ -60,29 +60,6 @@ ATIModifyExtReg
     if (CurrentValue == NewValue)
         return;
 
-    /*
-     * The following is taken from ATI's VGA Wonder programmer's reference
-     * manual which says that this is needed to "ensure the proper state of the
-     * 8/16 bit ROM toggle".  I suspect a timing glitch appeared in the 18800
-     * after its die was cast.  18800-1 and later chips do not exhibit this
-     * problem.
-     */
-    if ((pATI->Chip <= ATI_CHIP_18800) && (Index == 0xB2U) &&
-       ((NewValue ^ 0x40U) & CurrentValue & 0x40U))
-    {
-        CARD8 misc = inb(R_GENMO);
-        CARD8 bb = ATIGetExtReg(0xBBU);
-
-        outb(GENMO, (misc & 0xF3U) | 0x04U | ((bb & 0x10U) >> 1));
-        CurrentValue &= (CARD8)(~0x40U);
-        ATIPutExtReg(0xB2U, CurrentValue);
-        ATIDelay(5);
-        outb(GENMO, misc);
-        ATIDelay(5);
-        if (CurrentValue != NewValue)
-            ATIPutExtReg(0xB2U, NewValue);
-    }
-    else
         ATIPutExtReg(Index, NewValue);
 }