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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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64
src/vid_unk_ramdac.c Normal file
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/*It is unknown exactly what RAMDAC this is
It is possibly a Sierra 1502x
It's addressed by the TLIVESA1 driver for ET4000*/
#include "ibm.h"
#include "mem.h"
#include "video.h"
#include "vid_svga.h"
#include "vid_unk_ramdac.h"
void unk_ramdac_out(uint16_t addr, uint8_t val, unk_ramdac_t *ramdac, svga_t *svga)
{
//pclog("OUT RAMDAC %04X %02X\n",addr,val);
switch (addr)
{
case 0x3C6:
if (ramdac->state == 4)
{
ramdac->state = 0;
ramdac->ctrl = val;
switch ((val&1)|((val&0xE0)>>4))
{
case 0: case 1: case 2: case 3:
svga->bpp = 8;
break;
case 6: case 7:
svga->bpp = 15;
break;
case 8: case 9: case 0xA: case 0xB:
svga->bpp = 16;
break;
case 0xC: case 0xD: case 0xE: case 0xF:
svga->bpp = 24;
break;
}
return;
}
ramdac->state = 0;
break;
case 0x3C7: case 0x3C8: case 0x3C9:
ramdac->state = 0;
break;
}
svga_out(addr, val, svga);
}
uint8_t unk_ramdac_in(uint16_t addr, unk_ramdac_t *ramdac, svga_t *svga)
{
//pclog("IN RAMDAC %04X\n",addr);
switch (addr)
{
case 0x3C6:
if (ramdac->state == 4)
{
ramdac->state = 0;
return ramdac->ctrl;
}
ramdac->state++;
break;
case 0x3C7: case 0x3C8: case 0x3C9:
ramdac->state = 0;
break;
}
return svga_in(addr, svga);
}