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ET4000/W32* PCI: Revert BIOS read/write code to PCem's, fixes #6175.

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This commit is contained in:
Miran Grča
2025-09-16 23:50:45 +02:00
committed by GitHub
parent ae1da09997
commit d8380b07a9
1 changed files with 5 additions and 12 deletions
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17
src/video/vid_et4000w32.c
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@@ -2654,9 +2654,9 @@ et4000w32p_pci_read(UNUSED(int func), int addr, void *priv)
case 0x31:
return 0x00;
case 0x32:
return 0x00;
return et4000->pci_regs[0x32];
case 0x33:
return et4000->pci_regs[0x33] & 0xf0;
return et4000->pci_regs[0x33];
default:
break;
@@ -2695,20 +2695,13 @@ et4000w32p_pci_write(UNUSED(int func), int addr, uint8_t val, void *priv)
break;
case 0x30:
case 0x31:
case 0x32:
case 0x33:
et4000->pci_regs[addr] = val;
et4000->pci_regs[0x30] = 1;
et4000->pci_regs[0x31] = 0;
et4000->pci_regs[0x32] = 0;
et4000->pci_regs[0x33] &= 0xf0;
if (et4000->pci_regs[0x30] & 0x01) {
uint32_t biosaddr = (et4000->pci_regs[0x33] << 24);
if (!biosaddr)
biosaddr = 0xc0000;
et4000w32_log("ET4000 bios_rom enabled at %08x\n", biosaddr);
mem_mapping_set_addr(&et4000->bios_rom.mapping, biosaddr, 0x8000);
uint32_t addr = (et4000->pci_regs[0x32] << 16) | (et4000->pci_regs[0x33] << 24);
et4000w32_log("ET4000 bios_rom enabled at %08x\n", addr);
mem_mapping_set_addr(&et4000->bios_rom.mapping, addr, 0x8000);
} else {
et4000w32_log("ET4000 bios_rom disabled\n");
mem_mapping_disable(&et4000->bios_rom.mapping);