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Initial submission of the PCem-Experimental source code.

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OBattler
2016-06-26 00:34:39 +02:00
parent 09d7c4384f
commit fd2a5bc9f5
610 changed files with 184352 additions and 0 deletions
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65
src/vid_tkd8001_ramdac.c Normal file
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/*Trident TKD8001 RAMDAC emulation*/
#include "ibm.h"
#include "mem.h"
#include "video.h"
#include "vid_svga.h"
#include "vid_tkd8001_ramdac.h"
static int tkd8001_state=0;
static uint8_t tkd8001_ctrl;
void tkd8001_ramdac_out(uint16_t addr, uint8_t val, tkd8001_ramdac_t *ramdac, svga_t *svga)
{
// pclog("OUT RAMDAC %04X %02X %04X:%04X\n",addr,val,CS,pc);
switch (addr)
{
case 0x3C6:
if (ramdac->state == 4)
{
ramdac->state = 0;
ramdac->ctrl = val;
switch (val >> 5)
{
case 0: case 1: case 2: case 3:
svga->bpp = 8;
break;
case 5:
svga->bpp = 15;
break;
case 6:
svga->bpp = 24;
break;
case 7:
svga->bpp = 16;
break;
}
return;
}
// tkd8001_state = 0;
break;
case 0x3C7: case 0x3C8: case 0x3C9:
ramdac->state = 0;
break;
}
svga_out(addr, val, svga);
}
uint8_t tkd8001_ramdac_in(uint16_t addr, tkd8001_ramdac_t *ramdac, svga_t *svga)
{
// pclog("IN RAMDAC %04X %04X:%04X\n",addr,CS,pc);
switch (addr)
{
case 0x3C6:
if (ramdac->state == 4)
{
//tkd8001_state = 0;
return ramdac->ctrl;
}
ramdac->state++;
break;
case 0x3C7: case 0x3C8: case 0x3C9:
ramdac->state = 0;
break;
}
return svga_in(addr, svga);
}