Now up to date with current dev version.

Changes since v0.7 :
- Major CPU reorganisation. This has possibly broken some stuff, though I fixed all the regressions I could find
- Lazy flags. This brought 10% speed improvement at one point, but that's probably been lost now
- 430 VX chipset emulation
- IDT Winchip emulation (currently sans MMX). Timing is probably wrong
- Fixed a few FPU bugs
- Timer reorganisation
- Sound reorganisation
- Other general reorganisation
- AdLib Gold emulation
- Windows Sound System emulation
- Pro Audio Spectrum 16 emulation. This currently works with most DOS stuff, but not in Windows
- Major improvements to GUS emulation. Has the downside that it now conflicts with SB emulation, so probably best to not enable both simultaneously
- New graphics cards :
  - ATI-18800 (VGA Edge-16)
  - ATI-28800 (VGA Charger)
  - ATI Mach64GX (Graphics Pro Turbo). Quite a few features missing, but Windows doesn't seem to use half the features of this card
  - Cirrus Logic CL-GD5429. Blitter is a bit broken
  - Oak OTI-067
  - S3 Trio64 (Number Nine 9FX)
  - S3 Virge. Only framebuffer stuff at the minute, Windows won't recognise the card
  - Trident TGUI-9440
  - VGA. Doesn't work yet
- Beginnings of 3DFX emulation, however this is in extremely early stages and doesn't do anything useful
- Fixed DMA bug stopping floppy drives working in Windows 3.x
- Fixed some other stuff probably
- Broke some other stuff probably as well

src/vid_mda.c

@@ -1,5 +1,8 @@
 /*MDA emulation*/
 #include "ibm.h"
+#include "io.h"
+#include "mem.h"
+#include "timer.h"
 #include "video.h"
 
 void mda_recalctimings();
@@ -7,7 +10,7 @@ void mda_recalctimings();
 static uint8_t mda_ctrl,mda_stat;
 uint8_t crtcm[32],crtcmreg;
 
-void mda_out(uint16_t addr, uint8_t val)
+void mda_out(uint16_t addr, uint8_t val, void *priv)
 {
         switch (addr)
         {
@@ -29,7 +32,7 @@ void mda_out(uint16_t addr, uint8_t val)
         }
 }
 
-uint8_t mda_in(uint16_t addr)
+uint8_t mda_in(uint16_t addr, void *priv)
 {
         switch (addr)
         {
@@ -40,32 +43,36 @@ uint8_t mda_in(uint16_t addr)
                 case 0x3BA:
                 return mda_stat | 0xF0;
         }
+        return 0xff;
 }
 
-void mda_write(uint32_t addr, uint8_t val)
+void mda_write(uint32_t addr, uint8_t val, void *priv)
 {
         vram[addr&0xFFF]=val;
 }
 
-uint8_t mda_read(uint32_t addr)
+uint8_t mda_read(uint32_t addr, void *priv)
 {
         return vram[addr&0xFFF];
 }
 
 void mda_recalctimings()
 {
+	double _dispontime, _dispofftime;
         disptime=crtc[0]+1;
-        dispontime=crtc[1];
-        dispofftime=disptime-dispontime;
-        dispontime*=MDACONST;
-        dispofftime*=MDACONST;
+        _dispontime=crtc[1];
+        _dispofftime=disptime-_dispontime;
+        _dispontime*=MDACONST;
+        _dispofftime*=MDACONST;
+	dispontime = (int)(_dispontime * (1 << TIMER_SHIFT));
+	dispofftime = (int)(_dispofftime * (1 << TIMER_SHIFT));
 }
 
 int mdacols[256][2][2];
 
 static int linepos,displine;
 static int vc,sc;
-static uint16_t ma,maback,ca;
+static uint16_t ma,maback;
 static int con,coff,cursoron;
 static int cgadispon,cgablink;
 static int vsynctime,vadj;
@@ -77,9 +84,7 @@ void mda_poll()
         int x,c;
         int oldvc;
         uint8_t chr,attr;
-        uint16_t dat,dat2,dat3,dat4;
         int cols[4];
-        int col;
         int oldsc;
         int blink;
         if (!linepos)
@@ -227,7 +232,7 @@ void mda_poll()
 
 int mda_init()
 {
-        mem_sethandler(0xb0000, 0x08000, mda_read, NULL, NULL, mda_write, NULL, NULL);
+        mem_sethandler(0xb0000, 0x08000, mda_read, NULL, NULL, mda_write, NULL, NULL,  NULL);
         return 0;
 }