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Fixes for Dangerous Dave on ET4000/w32 cards

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This commit is contained in:
Cacodemon345
2025-08-10 01:46:48 +06:00
parent dee7ceab23
commit 139457b9ed
1 changed files with 18 additions and 6 deletions
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24
src/video/vid_et4000w32.c
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@@ -366,7 +366,8 @@ et4000w32p_in(uint16_t addr, void *priv)
}
return svga->crtc[svga->crtcreg];
case 0x3da:
case 0x3da: {
uint8_t ret = 0xff;
svga->attrff = 0;
/*Bit 1 of the Input Status Register is required by the OS/2 and NT ET4000W32/I drivers to be set otherwise
@@ -375,7 +376,18 @@ et4000w32p_in(uint16_t addr, void *priv)
svga->cgastat &= ~0x32;
else
svga->cgastat ^= 0x32;
return svga->cgastat;
ret = svga->cgastat;
if ((svga->fcr & 0x08) && svga->dispon)
ret |= 0x08;
if (ret & 0x08)
ret &= 0x7f;
else
ret |= 0x80;
return ret;
}
case 0x210a:
case 0x211a:
@@ -455,19 +467,19 @@ et4000w32p_recalctimings(svga_t *svga)
svga->clock = (cpuclock * (double) (1ULL << 32)) / svga->getclock((svga->miscout >> 2) & 3, svga->clock_gen);
if (et4000->type != ET4000W32P_DIAMOND) {
if (et4000->type != ET4000W32P_DIAMOND && et4000->type != ET4000W32P_VIDEOMAGIC_REVB && et4000->type != ET4000W32P_CARDEX && et4000->type != ET4000W32P) {
if ((svga->gdcreg[6] & 1) || (svga->attrregs[0x10] & 1)) {
if (svga->gdcreg[5] & 0x40) {
switch (svga->bpp) {
case 8:
svga->clock /= 2;
svga->clock *= 2;
break;
case 15:
case 16:
svga->clock /= 3;
svga->clock *= 3;
break;
case 24:
svga->clock /= 4;
svga->clock *= 4;
break;
default: