diff --git a/configure.ac b/configure.ac
index 5091e50..f74b912 100644
--- a/configure.ac
+++ b/configure.ac
@@ -20,45 +20,45 @@
 #
 # Process this file with autoconf to produce a configure script
 
-AC_PREREQ(2.57)
+# Initialize Autoconf
+AC_PREREQ([2.60])
 AC_INIT([xf86-video-rendition],
-        4.2.4,
+        [4.2.4],
         [https://bugs.freedesktop.org/enter_bug.cgi?product=xorg],
-        xf86-video-rendition)
-
+        [xf86-video-rendition])
 AC_CONFIG_SRCDIR([Makefile.am])
-AM_CONFIG_HEADER([config.h])
+AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_AUX_DIR(.)
 
+# Initialize Automake
 AM_INIT_AUTOMAKE([foreign dist-bzip2])
-
 AM_MAINTAINER_MODE
 
-# Require xorg-macros: XORG_DEFAULT_OPTIONS
+# Require X.Org macros 1.8 or later for MAN_SUBSTS set by XORG_MANPAGE_SECTIONS
 m4_ifndef([XORG_MACROS_VERSION],
-          [m4_fatal([must install xorg-macros 1.3 or later before running autoconf/autogen])])
-XORG_MACROS_VERSION(1.3)
+          [m4_fatal([must install xorg-macros 1.8 or later before running autoconf/autogen])])
+XORG_MACROS_VERSION(1.8)
 XORG_DEFAULT_OPTIONS
 
-# Checks for programs.
+# Initialize libtool
 AC_DISABLE_STATIC
 AC_PROG_LIBTOOL
-AC_PROG_CC
 
 AH_TOP([#include "xorg-server.h"])
 
+# Define a configure option for an alternate module directory
 AC_ARG_WITH(xorg-module-dir,
-            AC_HELP_STRING([--with-xorg-module-dir=DIR],
+            AS_HELP_STRING([--with-xorg-module-dir=DIR],
                            [Default xorg module directory [[default=$libdir/xorg/modules]]]),
             [moduledir="$withval"],
             [moduledir="$libdir/xorg/modules"])
 
-# Checks for extensions
+# Store the list of server defined optional extensions in REQUIRED_MODULES
 XORG_DRIVER_CHECK_EXT(RANDR, randrproto)
 XORG_DRIVER_CHECK_EXT(RENDER, renderproto)
 XORG_DRIVER_CHECK_EXT(DPMSExtension, xextproto)
 
-# Checks for pkg-config packages
+# Obtain compiler/linker options for the driver dependencies
 PKG_CHECK_MODULES(XORG, [xorg-server >= 1.0.99.901 xproto fontsproto $REQUIRED_MODULES])
 
 # Checks for libraries.
@@ -78,17 +78,16 @@ fi
 AM_CONDITIONAL(XSERVER_LIBPCIACCESS, test "x$XSERVER_LIBPCIACCESS" = xyes)
 
 # Checks for header files.
-AC_HEADER_STDC
 AC_CHECK_HEADERS([elf.h] [elf_abi.h])
 
-AC_SUBST([XORG_CFLAGS])
 AC_SUBST([moduledir])
 
 DRIVER_NAME=rendition
 AC_SUBST([DRIVER_NAME])
 
-AC_OUTPUT([
-	Makefile
-	src/Makefile
-	man/Makefile
+AC_CONFIG_FILES([
+                Makefile
+                src/Makefile
+                man/Makefile
 ])
+AC_OUTPUT
diff --git a/man/Makefile.am b/man/Makefile.am
index 8f2454b..b3688ce 100644
--- a/man/Makefile.am
+++ b/man/Makefile.am
@@ -31,25 +31,11 @@ EXTRA_DIST = @DRIVER_NAME@.man
 
 CLEANFILES = $(driverman_DATA)
 
-SED = sed
-
-# Strings to replace in man pages
-XORGRELSTRING = @PACKAGE_STRING@
-  XORGMANNAME = X Version 11
-
-MAN_SUBSTS = \
-	-e 's|__vendorversion__|"$(XORGRELSTRING)" "$(XORGMANNAME)"|' \
-	-e 's|__xorgversion__|"$(XORGRELSTRING)" "$(XORGMANNAME)"|' \
-	-e 's|__xservername__|Xorg|g' \
-	-e 's|__xconfigfile__|xorg.conf|g' \
-	-e 's|__projectroot__|$(prefix)|g' \
-	-e 's|__appmansuffix__|$(APP_MAN_SUFFIX)|g' \
-	-e 's|__drivermansuffix__|$(DRIVER_MAN_SUFFIX)|g' \
-	-e 's|__adminmansuffix__|$(ADMIN_MAN_SUFFIX)|g' \
-	-e 's|__miscmansuffix__|$(MISC_MAN_SUFFIX)|g' \
-	-e 's|__filemansuffix__|$(FILE_MAN_SUFFIX)|g'
+
+# String replacements in MAN_SUBSTS now come from xorg-macros.m4 via configure
+
 
 SUFFIXES = .$(DRIVER_MAN_SUFFIX) .man
 
 .man.$(DRIVER_MAN_SUFFIX):
-	sed $(MAN_SUBSTS) < $< > $@
+	$(AM_V_GEN)$(SED) $(MAN_SUBSTS) < $< > $@
diff --git a/man/rendition.man b/man/rendition.man
index 3658ab0..afeee91 100644
--- a/man/rendition.man
+++ b/man/rendition.man
@@ -1,4 +1,3 @@
-.\" $__xservername__: xc/programs/Xserver/hw/xfree86/drivers/rendition/rendition.man,v 1.3 2003/06/18 16:17:39 eich Exp $ 
 .\" shorthand for double quote that works everywhere.
 .ds q \N'34'
 .TH RENDITION __drivermansuffix__ __vendorversion__
diff --git a/src/accelX.c b/src/accelX.c
index a499c56..ed4964e 100644
--- a/src/accelX.c
+++ b/src/accelX.c
@@ -289,7 +289,7 @@ int
 RENDITIONInitUcode(ScrnInfoPtr pScreenInfo)
 {
     renditionPtr pRendition = RENDITIONPTR(pScreenInfo);
-    IOADDRESS iob = pRendition->board.io_base;
+    unsigned long iob = pRendition->board.io_base;
 
     if (0 == verite_getstride(pScreenInfo, NULL,
 			 &pRendition->board.mode.stride0, 
@@ -367,7 +367,7 @@ void
 RENDITIONRestoreUcode(ScrnInfoPtr pScreenInfo)
 {
     renditionPtr pRendition = RENDITIONPTR(pScreenInfo);
-    IOADDRESS iob = pRendition->board.io_base;
+    unsigned long iob = pRendition->board.io_base;
 
     vu8 memend;
 
@@ -410,7 +410,7 @@ void
 RENDITIONSaveUcode(ScrnInfoPtr pScreenInfo)
 {
     renditionPtr pRendition = RENDITIONPTR(pScreenInfo);
-    IOADDRESS iob = pRendition->board.io_base;
+    unsigned long iob = pRendition->board.io_base;
     vu8 memend;
 
 #ifdef DEBUG
@@ -445,7 +445,7 @@ void
 RENDITIONSyncV1000(ScrnInfoPtr pScreenInfo)
 {
     renditionPtr pRendition = RENDITIONPTR(pScreenInfo);
-    IOADDRESS iob = pRendition->board.io_base;
+    unsigned long iob = pRendition->board.io_base;
 
     int c;
 
@@ -555,7 +555,7 @@ RENDITIONSubsequentScreenToScreenCopy(ScrnInfoPtr pScreenInfo,
 					   int w, int h)
 {
     renditionPtr pRendition = RENDITIONPTR(pScreenInfo);
-    IOADDRESS iob = pRendition->board.io_base;
+    unsigned long iob = pRendition->board.io_base;
 
 
 #ifdef DEBUG
@@ -607,7 +607,7 @@ RENDITIONSubsequentSolidFillRect(ScrnInfoPtr pScreenInfo,
 				      int x, int y, int w, int h)
 {
     renditionPtr pRendition = RENDITIONPTR(pScreenInfo);
-    IOADDRESS iob = pRendition->board.io_base;
+    unsigned long iob = pRendition->board.io_base;
 
 
 #ifdef DEBUG
@@ -639,7 +639,7 @@ RENDITIONSubsequentTwoPointLine(ScrnInfoPtr pScreenInfo,
 				     int bias)
 {
     renditionPtr pRendition = RENDITIONPTR(pScreenInfo);
-    IOADDRESS iob = pRendition->board.io_base;
+    unsigned long iob = pRendition->board.io_base;
 
 
 #ifdef DEBUG
diff --git a/src/rendition.c b/src/rendition.c
index 7a9e18b..3202b49 100644
--- a/src/rendition.c
+++ b/src/rendition.c
@@ -330,7 +330,7 @@ renditionProbe(DriverPtr drv, int flags)
                     renditionChipsets, renditionPCIchipsets, 
                     devSections, numDevSections, drv, &usedChips);
 
-	xfree(devSections);
+	free(devSections);
 	if (numUsed <= 0)
 	    return FALSE;
 
@@ -359,7 +359,7 @@ renditionProbe(DriverPtr drv, int flags)
 		foundScreen=TRUE;
 	    }
         }
-	xfree(usedChips);
+	free(usedChips);
     }
     return foundScreen;
 }
@@ -400,7 +400,7 @@ renditionGetRec(ScrnInfoPtr pScreenInfo)
     sleep(1);
 #endif
     if (!pScreenInfo->driverPrivate)
-        pScreenInfo->driverPrivate=xcalloc(sizeof(renditionRec), 1);
+        pScreenInfo->driverPrivate=calloc(sizeof(renditionRec), 1);
 
     /* perhaps some initialization? <ml> */
 
@@ -421,7 +421,7 @@ renditionFreeRec(ScrnInfoPtr pScreenInfo)
 #endif
     if (xf86LoaderCheckSymbol("vgaHWFreeHWRec"))
 	vgaHWFreeHWRec(pScreenInfo);
-    xfree(pScreenInfo->driverPrivate);
+    free(pScreenInfo->driverPrivate);
     pScreenInfo->driverPrivate=NULL;
 
 #ifdef DEBUG
@@ -596,7 +596,7 @@ renditionPreInit(ScrnInfoPtr pScreenInfo, int flags)
     /* collect all of the options flags and process them */
 
     xf86CollectOptions(pScreenInfo, NULL);
-    if (!(pRendition->Options = xalloc(sizeof(renditionOptions))))
+    if (!(pRendition->Options = malloc(sizeof(renditionOptions))))
 	return FALSE;
     memcpy(pRendition->Options, renditionOptions, sizeof(renditionOptions));
     xf86ProcessOptions(pScreenInfo->scrnIndex, pScreenInfo->options, 
@@ -663,7 +663,11 @@ renditionPreInit(ScrnInfoPtr pScreenInfo, int flags)
     vgaHWGetIOBase(pvgaHW);             /* Get VGA I/O base */
 
     pRendition->board.accel=0;
+#if GET_ABI_MAJOR(ABI_VIDEODRV_VERSION) < 12
     pRendition->board.vgaio_base = pvgaHW->PIOOffset;
+#else
+    pRendition->board.vgaio_base = 0;
+#endif
     pRendition->board.io_base = pRendition->board.vgaio_base 
 #ifdef XSERVER_LIBPCIACCESS
 	+ pRendition->PciInfo->regions[1].base_addr;
@@ -1167,7 +1171,7 @@ renditionScreenInit(int scrnIndex, ScreenPtr pScreen, int argc, char **argv)
 	pRendition->board.shadowPitch 
 	    = BitmapBytePad(pScreenInfo->bitsPerPixel * width);
 	pRendition->board.shadowPtr 
-	    = xalloc(pRendition->board.shadowPitch * height);
+	    = malloc(pRendition->board.shadowPitch * height);
 	displayWidth = pRendition->board.shadowPitch 
 	    / (pScreenInfo->bitsPerPixel >> 3);
 	FBBase = pRendition->board.shadowPtr;
@@ -1484,7 +1488,7 @@ static xf86MonPtr
 renditionDDC (ScrnInfoPtr pScreenInfo)
 {
   renditionPtr pRendition = RENDITIONPTR(pScreenInfo);
-  IOADDRESS iob=pRendition->board.io_base;
+  unsigned long iob=pRendition->board.io_base;
   vu32 temp;
 
   xf86MonPtr MonInfo = NULL;
@@ -1517,7 +1521,7 @@ static unsigned int
 renditionDDC1Read (ScrnInfoPtr pScreenInfo)
 {
   renditionPtr pRendition = RENDITIONPTR(pScreenInfo);
-  IOADDRESS iob=pRendition->board.io_base;
+  unsigned long iob=pRendition->board.io_base;
   vu32 value = 0;
 
   /* wait for Vsync */
diff --git a/src/v1krisc.c b/src/v1krisc.c
index 2554263..9b7b4e2 100644
--- a/src/v1krisc.c
+++ b/src/v1krisc.c
@@ -83,20 +83,20 @@
  * local function prototypes
  */
 
-static void verite_iopoll(IOADDRESS port, vu32 data, vu32 mask);
-static void verite_iopoll8(IOADDRESS port, vu8 data, vu8 mask);
+static void verite_iopoll(unsigned long port, vu32 data, vu32 mask);
+static void verite_iopoll8(unsigned long port, vu8 data, vu8 mask);
 
-static vu32 readRF(IOADDRESS io_base, vu8 index);
-static void writeRF(IOADDRESS io_base, vu8 index, vu32 data);
+static vu32 readRF(unsigned long io_base, vu8 index);
+static void writeRF(unsigned long io_base, vu8 index, vu32 data);
 
-static vu32 risc_readmem(IOADDRESS io_base, vu32 addr, vu8 read_type);
-static void risc_writemem(IOADDRESS io_base, vu32 addr, vu32 data, vu8 write_type);
+static vu32 risc_readmem(unsigned long io_base, vu32 addr, vu8 read_type);
+static void risc_writemem(unsigned long io_base, vu32 addr, vu32 data, vu8 write_type);
 
 #if 0
-static void risc_step(IOADDRESS io_base, vu32 count);
+static void risc_step(unsigned long io_base, vu32 count);
 #endif
-static void risc_forcestep(IOADDRESS io_base, vu32 instruction);
-static void risc_continue(IOADDRESS io_base);
+static void risc_forcestep(unsigned long io_base, vu32 instruction);
+static void risc_continue(unsigned long io_base);
 
 
 
@@ -113,7 +113,7 @@ void
 v1k_start(ScrnInfoPtr pScreenInfo, vu32 pc)
 {
   renditionPtr pRendition = RENDITIONPTR(pScreenInfo);
-  IOADDRESS io_base=pRendition->board.io_base;
+  unsigned long io_base=pRendition->board.io_base;
 
   v1k_stop(pScreenInfo);
   risc_forcestep(io_base, NOP_INSTR);
@@ -152,7 +152,7 @@ v1k_stop(ScrnInfoPtr pScreenInfo)
 {
   renditionPtr pRendition = RENDITIONPTR(pScreenInfo);
   vu8	debugreg, statusreg;
-  IOADDRESS io_base=pRendition->board.io_base;
+  unsigned long io_base=pRendition->board.io_base;
   vu16 STATUS = 0x4A;   /* v2x00 io register offset */
   int c;
 
@@ -207,7 +207,7 @@ v1k_flushicache(ScrnInfoPtr pScreenInfo)
 {
   renditionPtr pRendition = RENDITIONPTR(pScreenInfo);
   vu32 c, p1, p2;
-  IOADDRESS io_base=pRendition->board.io_base;
+  unsigned long io_base=pRendition->board.io_base;
 
   /* first flush store accumulation buffers so data is all in memory */
   p1=risc_readmem(io_base, 0, READ_WORD);
@@ -255,7 +255,7 @@ void
 v1k_softreset(ScrnInfoPtr pScreenInfo)
 {
   renditionPtr pRendition = RENDITIONPTR(pScreenInfo);
-  IOADDRESS io_base=pRendition->board.io_base;
+  unsigned long io_base=pRendition->board.io_base;
 
   verite_out8(io_base+DEBUGREG, SOFTRESET|HOLDRISC);
   verite_out8(io_base+STATEINDEX, STATEINDEX_PC);
@@ -300,12 +300,12 @@ v1k_getriscprocs(verite_board_desc *boardDesc)
  */
 
 /* 
- * static void verite_iopoll(IOADDRESS port, vu32 data, vu32 mask)
+ * static void verite_iopoll(unsigned long port, vu32 data, vu32 mask)
  *
  * Loop on IO read until expected data is read or VERITE_MAX_POLLS is reached.
  */
 static void
-verite_iopoll(IOADDRESS port, vu32 data, vu32 mask)
+verite_iopoll(unsigned long port, vu32 data, vu32 mask)
 {
   vu32 c;
 
@@ -320,12 +320,12 @@ verite_iopoll(IOADDRESS port, vu32 data, vu32 mask)
 
 
 /* 
- * static void verite_iopoll8(IOADDRESS port, vu8 data, vu8 mask)
+ * static void verite_iopoll8(unsigned long port, vu8 data, vu8 mask)
  *
  * Loop on IO read until expected data is read or VERITE_MAX_POLLS is reached.
  */
 static void
-verite_iopoll8(IOADDRESS port, vu8 data, vu8 mask)
+verite_iopoll8(unsigned long port, vu8 data, vu8 mask)
 {
   vu32 c;
 
@@ -340,12 +340,12 @@ verite_iopoll8(IOADDRESS port, vu8 data, vu8 mask)
 
 
 /*
- * static vu32 readRF(IOADDRESS io_base, vu8 index)
+ * static vu32 readRF(unsigned long io_base, vu8 index)
  *
  * Reads data from register file.
  */
 static vu32
-readRF(IOADDRESS io_base, vu8 index)
+readRF(unsigned long io_base, vu8 index)
 {
   vu32 data, instr;
   vu8 debug, stateindex;
@@ -378,12 +378,12 @@ readRF(IOADDRESS io_base, vu8 index)
 
 
 /*
- * static void writeRF(IOADDRESS io_base, vu8 index, vu32 data)
+ * static void writeRF(unsigned long io_base, vu8 index, vu32 data)
  *
  * Set RF register, being careful on how to set regs below 64.
  */
 static void
-writeRF(IOADDRESS io_base, vu8 index, vu32 data)
+writeRF(unsigned long io_base, vu8 index, vu32 data)
 {
   vu8 special=0;
 
@@ -417,12 +417,12 @@ writeRF(IOADDRESS io_base, vu8 index, vu32 data)
 
 
 /*
- * static vu32 risc_readmem(IOADDRESS io_base, vu32 addr, vu8 read_type)
+ * static vu32 risc_readmem(unsigned long io_base, vu32 addr, vu8 read_type)
  *
  * NOTE: Assumes RISC is in hold mode.
  */
 static vu32
-risc_readmem(IOADDRESS io_base, vu32 addr, vu8 read_type)
+risc_readmem(unsigned long io_base, vu32 addr, vu8 read_type)
 {
   vu32 data;
 
@@ -445,12 +445,12 @@ risc_readmem(IOADDRESS io_base, vu32 addr, vu8 read_type)
 
 
 /*
- * static vu32 risc_writemem(IOADDRESS io_base, vu32 addr, vu32 data, vu8 write_type)
+ * static vu32 risc_writemem(unsigned long io_base, vu32 addr, vu32 data, vu8 write_type)
  *
  * NOTE: Assumes RISC is in hold mode.
  */
 static void
-risc_writemem(IOADDRESS io_base, vu32 addr, vu32 data, vu8 write_type)
+risc_writemem(unsigned long io_base, vu32 addr, vu32 data, vu8 write_type)
 {
   writeRF(io_base, RISC_RA, addr);          /* point to memory */
   writeRF(io_base, RISC_FP, data);          /* set data */
@@ -466,12 +466,12 @@ risc_writemem(IOADDRESS io_base, vu32 addr, vu32 data, vu8 write_type)
 
 #if 0
 /*
- * static void risc_step(IOADDRESS io_base, vu32 count)
+ * static void risc_step(unsigned long io_base, vu32 count)
  *
  * Single step the RISC. NOTE: Do not force instruction into RISCIR!
  */
 static void
-risc_step(IOADDRESS io_base, vu32 count)
+risc_step(unsigned long io_base, vu32 count)
 {
   vu32 c, d;
   vu8 debugreg;
@@ -494,12 +494,12 @@ risc_step(IOADDRESS io_base, vu32 count)
 
 
 /*
- * static void risc_forcestep(IOADDRESS io_base, vu32 instruction)
+ * static void risc_forcestep(unsigned long io_base, vu32 instruction)
  *
  * Single step RISC; force instruction; assumes RISC held.
  */
 static void
-risc_forcestep(IOADDRESS io_base, vu32 instruction)
+risc_forcestep(unsigned long io_base, vu32 instruction)
 {
   vu32 c;
   vu8 debugreg, stateindex;
@@ -525,12 +525,12 @@ risc_forcestep(IOADDRESS io_base, vu32 instruction)
 
 
 /*
- * static void risc_continue(IOADDRESS io_base)
+ * static void risc_continue(unsigned long io_base)
  *
  * Turn off hold bit.    
  */
 static void
-risc_continue(IOADDRESS io_base)
+risc_continue(unsigned long io_base)
 {
   vu8 debugreg;
 
diff --git a/src/vboard.c b/src/vboard.c
index 49499e2..622715f 100644
--- a/src/vboard.c
+++ b/src/vboard.c
@@ -38,7 +38,7 @@ verite_initboard(ScrnInfoPtr pScreenInfo)
 {
     renditionPtr pRendition = RENDITIONPTR(pScreenInfo);
 
-    IOADDRESS iob=pRendition->board.io_base;
+    unsigned long iob=pRendition->board.io_base;
     vu8 *vmb;
     vu32 offset;
     vu8 memendian;
@@ -207,7 +207,7 @@ void
 verite_check_csucode(ScrnInfoPtr pScreenInfo)
 {
   renditionPtr pRendition = RENDITIONPTR(pScreenInfo);
-  IOADDRESS iob=pRendition->board.io_base;
+  unsigned long iob=pRendition->board.io_base;
   vu8 *vmb;
   vu32 offset;
   int c;
diff --git a/src/vgafont-std.data b/src/vgafont-std.data
index db63ea8..c47983f 100644
--- a/src/vgafont-std.data
+++ b/src/vgafont-std.data
@@ -1,4 +1,3 @@
-/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/rendition/vgafont-std.data,v 1.3 1999/10/13 04:21:22 dawes Exp $ */
 #ifndef __VGAFONT_STD__
 #define __VGAFONT_STD__
 
diff --git a/src/vgafont-vrx.data b/src/vgafont-vrx.data
index ad34582..23b5908 100644
--- a/src/vgafont-vrx.data
+++ b/src/vgafont-vrx.data
@@ -1,4 +1,3 @@
-/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/rendition/vgafont-vrx.data,v 1.3 1999/10/13 04:21:23 dawes Exp $ */
 #ifndef __VGAFONT_VRX__
 #define __VGAFONT_VRX__
 
diff --git a/src/vgapalette.data b/src/vgapalette.data
index 5267608..106028d 100644
--- a/src/vgapalette.data
+++ b/src/vgapalette.data
@@ -1,4 +1,3 @@
-/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/rendition/vgapalette.data,v 1.3 1999/10/13 04:21:23 dawes Exp $ */
 #ifndef __VGAPALETTE__
 #define __VGAPALETTE__
 
diff --git a/src/vloaduc.c b/src/vloaduc.c
index 67bf901..5c6aab0 100644
--- a/src/vloaduc.c
+++ b/src/vloaduc.c
@@ -103,7 +103,7 @@ verite_load_ucfile(ScrnInfoPtr pScreenInfo, char *file_name)
   sz=SW16(ehdr.e_phentsize);
   num=SW16(ehdr.e_phnum);
   if (0!=sz && 0!=num) {
-	orig_pphdr=pphdr=(Elf32_Phdr *)xalloc(sz*num);
+	orig_pphdr=pphdr=(Elf32_Phdr *)malloc(sz*num);
 	if (!pphdr) {
 	  ErrorF("RENDITION: Cannot allocate global memory (1)\n"); 
 	  close(fd);
@@ -125,7 +125,7 @@ verite_load_ucfile(ScrnInfoPtr pScreenInfo, char *file_name)
     sz=SW16(ehdr.e_shentsize);
     num=SW16(ehdr.e_shnum);
     if (0!=sz && 0!=num) {
-      orig_pshdr=pshdr=(Elf32_Shdr *)xalloc(sz*num);
+      orig_pshdr=pshdr=(Elf32_Shdr *)malloc(sz*num);
       if (!pshdr) {
         ErrorF("RENDITION: Cannot allocate global memory (2)\n"); 
         close(fd);
@@ -148,7 +148,7 @@ verite_load_ucfile(ScrnInfoPtr pScreenInfo, char *file_name)
         loadSegment2board(pScreenInfo, fd, pphdr);
         pphdr=(Elf32_Phdr *)(((char *)pphdr)+sz);
       } while (--num);
-      xfree(orig_pphdr);
+      free(orig_pphdr);
   }
   else {
     do {
@@ -158,7 +158,7 @@ verite_load_ucfile(ScrnInfoPtr pScreenInfo, char *file_name)
         loadSection2board(pScreenInfo, fd, pshdr);
 	  pshdr=(Elf32_Shdr *)(((char *)pshdr)+sz);
 	} while (--num) ;
-	xfree(orig_pshdr);
+	free(orig_pshdr);
   }
   close(fd);
 
@@ -195,7 +195,7 @@ loadSegment2board(ScrnInfoPtr pScreenInfo, int fd, Elf32_Phdr *phdr)
     return;
   }
 
-  data=(vu8 *)xalloc(size);
+  data=(vu8 *)malloc(size);
   if (NULL == data){
 	ErrorF("RENDITION: GlobalAllocPtr couldn't allocate %lx bytes",
 		(unsigned long)size);
@@ -210,7 +210,7 @@ loadSegment2board(ScrnInfoPtr pScreenInfo, int fd, Elf32_Phdr *phdr)
 
   mmve(pScreenInfo, size, data, physAddr);
 
-  xfree(data);
+  free(data);
 }
 
 
diff --git a/src/vmodes.c b/src/vmodes.c
index c0bd0df..f2dae0b 100644
--- a/src/vmodes.c
+++ b/src/vmodes.c
@@ -20,6 +20,7 @@
 #include "v1kregs.h"
 #include "v2kregs.h"
 
+#include <unistd.h>
 
 #undef DEBUG
 
@@ -201,7 +202,7 @@ struct V1000ClocksStr {
  * local function prototypes
  */
 
-static void set_PLL(IOADDRESS iob, vu32 value);
+static void set_PLL(unsigned long iob, vu32 value);
 static double V1000CalcClock(double target, int *M, int *N, int *P);
 static double V2200CalcClock(double target, int *m, int *n, int *p);
 
@@ -509,13 +510,13 @@ verite_getstride(ScrnInfoPtr pScreenInfo, int *width,
  */
 
 /*
- * void set_PLL(IOADDRESS iob, vu32 value)
+ * void set_PLL(unsigned long iob, vu32 value)
  *
  * Set PLL clock to desired frequency for the V1000.
  */
 
 void
-set_PLL(IOADDRESS iob, vu32 value)
+set_PLL(unsigned long iob, vu32 value)
 {
     vu32 ulD;
     int b;
diff --git a/src/vos.h b/src/vos.h
index 7b55f77..999c870 100644
--- a/src/vos.h
+++ b/src/vos.h
@@ -23,18 +23,18 @@
 /*
  * function prototypes
  */
-#define /*void*/ verite_out8(/*IOADDRESS*/ port, /*vu8*/ data) \
+#define /*void*/ verite_out8(/*unsigned long*/ port, /*vu8*/ data) \
                    outb(port, data)
 
-#define /*void*/ verite_out16(/*IOADDRESS*/ port, /*vu16*/ data) \
+#define /*void*/ verite_out16(/*unsigned long*/ port, /*vu16*/ data) \
                    outw(port, data)
 
-#define /*void*/ verite_out32(/*IOADDRESS*/ port, /*vu32*/ data) \
+#define /*void*/ verite_out32(/*unsigned long*/ port, /*vu32*/ data) \
                    outl(port, data)
 
-#define /*vu8*/  verite_in8(/*IOADDRESS*/ io_base)  ((vu8)inb(io_base))
-#define /*vu16*/ verite_in16(/*IOADDRESS*/ io_base) ((vu16)inw(io_base))
-#define /*vu32*/ verite_in32(/*IOADDRESS*/ io_base) ((vu32)inl(io_base))
+#define /*vu8*/  verite_in8(/*unsigned long*/ io_base)  ((vu8)inb(io_base))
+#define /*vu16*/ verite_in16(/*unsigned long*/ io_base) ((vu16)inw(io_base))
+#define /*vu32*/ verite_in32(/*unsigned long*/ io_base) ((vu32)inl(io_base))
 
 /* memory accesses */
 #define verite_read_memory32(base, offset) MMIO_IN32(base, offset)
diff --git a/src/vramdac.c b/src/vramdac.c
index 7c8acbd..21c1df7 100644
--- a/src/vramdac.c
+++ b/src/vramdac.c
@@ -93,11 +93,11 @@
  * local function prototypes
  */
 
-static void Bt485_write_masked(IOADDRESS port, vu8 reg, vu8 mask, vu8 data);
-static void Bt485_write_cmd3_masked(IOADDRESS port, vu8 mask, vu8 data);
+static void Bt485_write_masked(unsigned long port, vu8 reg, vu8 mask, vu8 data);
+static void Bt485_write_cmd3_masked(unsigned long port, vu8 mask, vu8 data);
 #if 0
-static vu8 Bt485_read_masked(IOADDRESS port, vu8 reg, vu8 mask);
-static vu8 Bt485_read_cmd3_masked(IOADDRESS port, vu8 mask);
+static vu8 Bt485_read_masked(unsigned long port, vu8 reg, vu8 mask);
+static vu8 Bt485_read_cmd3_masked(unsigned long port, vu8 mask);
 #endif
 
 /*
@@ -159,7 +159,7 @@ int
 verite_initdac(ScrnInfoPtr pScreenInfo, vu8 bpp, vu8 doubleclock)
 {
     renditionPtr pRendition = RENDITIONPTR(pScreenInfo);
-    IOADDRESS iob=pRendition->board.io_base+RAMDACBASEADDR;
+    unsigned long iob=pRendition->board.io_base+RAMDACBASEADDR;
     vu8 cmd0,cmd1,cmd2;
     vu8 cmd3_data=0;
 
@@ -271,7 +271,7 @@ verite_enablecursor(ScrnInfoPtr pScreenInfo, int type, int size)
                       BT485_3_COLOR_CURSOR, BT485_X_WINDOW_CURSOR };
     static vu8 csizes[]={ BT485_32_BY_32_CURSOR, BT485_64_BY_64_CURSOR };
   
-    IOADDRESS iob=pRendition->board.io_base+RAMDACBASEADDR;
+    unsigned long iob=pRendition->board.io_base+RAMDACBASEADDR;
 
 #ifdef DEBUG
     ErrorF ("Rendition: Debug verite_enablecursor called type=0x%x\n",type);
@@ -304,7 +304,7 @@ void
 verite_movecursor(ScrnInfoPtr pScreenInfo, vu16 x, vu16 y, vu8 xo, vu8 yo)
 {
     renditionPtr pRendition = RENDITIONPTR(pScreenInfo);
-    IOADDRESS iob=pRendition->board.io_base+RAMDACBASEADDR;
+    unsigned long iob=pRendition->board.io_base+RAMDACBASEADDR;
 
     x+=Cursor_size-xo;
     y+=Cursor_size-yo;
@@ -327,7 +327,7 @@ void
 verite_setcursorcolor(ScrnInfoPtr pScreenInfo, vu32 fg, vu32 bg)
 {
     renditionPtr pRendition = RENDITIONPTR(pScreenInfo);
-    IOADDRESS iob=pRendition->board.io_base+RAMDACBASEADDR;
+    unsigned long iob=pRendition->board.io_base+RAMDACBASEADDR;
 
 #ifdef DEBUG
     ErrorF ("Rendition: Debug verite_setcursorcolor called FG=0x%x BG=0x%x\n",
@@ -374,7 +374,7 @@ verite_loadcursor(ScrnInfoPtr pScreenInfo, vu8 size, vu8 *cursorimage)
     int c, bytes, row;
     vu8 *src = cursorimage;
     renditionPtr pRendition = RENDITIONPTR(pScreenInfo);
-    IOADDRESS iob=pRendition->board.io_base+RAMDACBASEADDR;
+    unsigned long iob=pRendition->board.io_base+RAMDACBASEADDR;
     vu8 tmp;
     vu8 memend; /* Added for byte-swap fix */
 
@@ -454,7 +454,7 @@ verite_setpalette(ScrnInfoPtr pScreenInfo, int numColors, int *indices,
 		LOCO *colors, VisualPtr pVisual)
 {
     renditionPtr pRendition = RENDITIONPTR(pScreenInfo);
-    IOADDRESS iob=pRendition->board.io_base;
+    unsigned long iob=pRendition->board.io_base;
     vu32 crtc_status;
     int i, index;
 
@@ -485,12 +485,12 @@ verite_setpalette(ScrnInfoPtr pScreenInfo, int numColors, int *indices,
  */
 
 /*
- * static void Bt485_write_masked(IOADDRESS port, vu8 reg, vu8 mask, vu8 data)
+ * static void Bt485_write_masked(unsigned long port, vu8 reg, vu8 mask, vu8 data)
  *
  *
  */
 static void
-Bt485_write_masked(IOADDRESS port, vu8 reg, vu8 mask, vu8 data)
+Bt485_write_masked(unsigned long port, vu8 reg, vu8 mask, vu8 data)
 {
     vu8 tmp;
 
@@ -501,12 +501,12 @@ Bt485_write_masked(IOADDRESS port, vu8 reg, vu8 mask, vu8 data)
 
 
 /*
- * static void Bt485_write_cmd3_masked(IOADDRESS port, vu8 mask, vu8 data)
+ * static void Bt485_write_cmd3_masked(unsigned long port, vu8 mask, vu8 data)
  *
  *
  */
 static void
-Bt485_write_cmd3_masked(IOADDRESS port, vu8 mask, vu8 data)
+Bt485_write_cmd3_masked(unsigned long port, vu8 mask, vu8 data)
 {
 /*
  *   Bt485_write_masked(port, BT485_COMMAND_REG_0, 0x7f, 0x80);
@@ -522,24 +522,24 @@ Bt485_write_cmd3_masked(IOADDRESS port, vu8 mask, vu8 data)
 
 #if 0
 /*
- * static vu8 Bt485_read_masked(IOADDRESS port, vu8 reg, vu8 mask)
+ * static vu8 Bt485_read_masked(unsigned long port, vu8 reg, vu8 mask)
  *
  *
  */
 static vu8
-Bt485_read_masked(IOADDRESS port, vu8 reg, vu8 mask)
+Bt485_read_masked(unsigned long port, vu8 reg, vu8 mask)
 {
     return verite_in8(port+reg)&mask;
 }
 
 
 /*
- * static vu8 Bt485_read_cmd3_masked(IOADDRESS port, vu8 mask)
+ * static vu8 Bt485_read_cmd3_masked(unsigned long port, vu8 mask)
  *
  *
  */
 static vu8
-Bt485_read_cmd3_masked(IOADDRESS port, vu8 mask)
+Bt485_read_cmd3_masked(unsigned long port, vu8 mask)
 {
     vu8 value;
 
diff --git a/src/vtypes.h b/src/vtypes.h
index 257870b..e4ad468 100644
--- a/src/vtypes.h
+++ b/src/vtypes.h
@@ -123,7 +123,7 @@ struct verite_board_t {
     vu16  chip;
 
     /* */
-    IOADDRESS io_base, vgaio_base;
+    unsigned long io_base, vgaio_base;
     vu32 mmio_base;
     vu32 vmmio_base;
     vu32 mem_size;