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S3: Fixed CRTC to PCI BAR mapping, fixes #4745.

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This commit is contained in:
OBattler
2024-08-26 04:36:23 +02:00
parent 0da8a3987b
commit ba859d7351
2 changed files with 20 additions and 33 deletions
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51
src/video/vid_s3.c
View File

@@ -9219,18 +9219,19 @@ s3_pci_read(UNUSED(int func), int addr, void *priv)
return s3->pci_regs[PCI_REG_COMMAND] | 0x80; /*Respond to IO and memory accesses*/
else
return s3->pci_regs[PCI_REG_COMMAND]; /*Respond to IO and memory accesses*/
break;
break;
case 0x07:
return (s3->chip == S3_TRIO64V2) ? (s3->pci_regs[0x07] & 0x36) : (1 << 1); /*Medium DEVSEL timing*/
case 0x08: switch (s3->chip) { /*Revision ID*/
case S3_TRIO64V:
return 0x40;
case S3_TRIO64V2:
return 0x16; /*Confirmed on an onboard 64V2/DX*/
default:
return 0x00;
case 0x08:
switch (s3->chip) { /*Revision ID*/
case S3_TRIO64V:
return 0x40;
case S3_TRIO64V2:
return 0x16; /*Confirmed on an onboard 64V2/DX*/
default:
return 0x00;
}
break;
case 0x09:
@@ -9252,24 +9253,11 @@ s3_pci_read(UNUSED(int func), int addr, void *priv)
case 0x0d:
return (s3->chip == S3_TRIO64V2) ? (s3->pci_regs[0x0d] & 0xf8) : 0x00;
case 0x10:
return 0x00; /*Linear frame buffer address*/
case 0x11:
return 0x00;
case 0x12:
if (svga->crtc[0x53] & 0x08)
return 0x00;
else
return (svga->crtc[0x5a] & 0x80);
break;
return (s3->chip >= S3_TRIO64V) ? 0x00 : (svga->crtc[0x5a] & 0x80);
case 0x13:
if (svga->crtc[0x53] & 0x08) {
return (s3->chip >= S3_TRIO64V) ? (svga->crtc[0x59] & 0xfc) : (svga->crtc[0x59] & 0xfe);
} else {
return svga->crtc[0x59];
}
break;
return (s3->chip >= S3_TRIO64V) ? (svga->crtc[0x59] & 0xfc) : svga->crtc[0x59];
case 0x30:
return s3->has_bios ? (s3->pci_regs[0x30] & 0x01) : 0x00; /*BIOS ROM address*/
@@ -9323,13 +9311,16 @@ s3_pci_write(UNUSED(int func), int addr, uint8_t val, void *priv)
s3_io_set(s3);
else
s3_io_remove(s3);
s3->pci_regs[PCI_REG_COMMAND] = (val & 0x23);
if (s3->chip >= S3_TRIO64V)
s3->pci_regs[PCI_REG_COMMAND] = (val & 0x27);
else
s3->pci_regs[PCI_REG_COMMAND] = (val & 0x23);
s3_updatemapping(s3);
break;
case 0x07:
if (s3->chip == S3_TRIO64V2) {
s3->pci_regs[0x07] = val & 0x3e;
s3->pci_regs[0x07] &= ~(val & 0x30);
return;
}
break;
@@ -9342,18 +9333,14 @@ s3_pci_write(UNUSED(int func), int addr, uint8_t val, void *priv)
break;
case 0x12:
if (!(svga->crtc[0x53] & 0x08)) {
svga->crtc[0x5a] = (svga->crtc[0x5a] & 0x7f) | (val & 0x80);
if (s3->chip < S3_TRIO64V) {
svga->crtc[0x5a] = val & 0x80;
s3_updatemapping(s3);
}
break;
case 0x13:
if (svga->crtc[0x53] & 0x08) {
svga->crtc[0x59] = (s3->chip >= S3_TRIO64V) ? (val & 0xfc) : (val & 0xfe);
} else {
svga->crtc[0x59] = val;
}
svga->crtc[0x59] = (s3->chip >= S3_TRIO64V) ? (val & 0xfc) : val;
s3_updatemapping(s3);
break;

2
src/video/vid_s3_virge.c
View File

@@ -4203,7 +4203,7 @@ s3_virge_pci_write(UNUSED(int func), int addr, uint8_t val, void *priv)
s3_virge_updatemapping(virge);
return;
case 0x07:
virge->pci_regs[0x07] = val & 0x3e;
virge->pci_regs[0x07] &= ~(val & 0x30);
return;
case 0x0d:
virge->pci_regs[0x0d] = val & 0xf8;