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Fix G100 VBIOS mapping

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This commit is contained in:
Cacodemon345
2024-01-02 14:12:02 +06:00
parent af5aafbc0e
commit 318403b133
1 changed files with 9 additions and 4 deletions
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13
src/video/vid_mga.c
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@@ -6202,9 +6202,11 @@ mystique_pci_write(UNUSED(int func), int addr, uint8_t val, void *priv)
if (!(mystique->pci_regs[0x43] & 0x40))
return;
mystique->pci_regs[addr] = val;
if (addr == 0x30)
mystique->pci_regs[addr] &= 1;
if (mystique->pci_regs[0x30] & 0x01) {
uint32_t addr = (mystique->pci_regs[0x32] << 16) | (mystique->pci_regs[0x33] << 24);
mem_mapping_set_addr(&mystique->bios_rom.mapping, addr, 0x8000);
mem_mapping_set_addr(&mystique->bios_rom.mapping, addr, (mystique->type == MGA_G100) ? 0x10000 : 0x8000);
} else
mem_mapping_disable(&mystique->bios_rom.mapping);
return;
@@ -6228,11 +6230,11 @@ mystique_pci_write(UNUSED(int func), int addr, uint8_t val, void *priv)
if (val & 0x40) {
if (mystique->pci_regs[0x30] & 0x01) {
uint32_t addr = (mystique->pci_regs[0x32] << 16) | (mystique->pci_regs[0x33] << 24);
mem_mapping_set_addr(&mystique->bios_rom.mapping, addr, 0x8000);
mem_mapping_set_addr(&mystique->bios_rom.mapping, addr, (mystique->type == MGA_G100) ? 0x10000 : 0x8000);
} else
mem_mapping_disable(&mystique->bios_rom.mapping);
} else
mem_mapping_set_addr(&mystique->bios_rom.mapping, 0x000c0000, 0x8000);
mem_mapping_set_addr(&mystique->bios_rom.mapping, 0x000c0000, (mystique->type == MGA_G100) ? 0x10000 : 0x8000);
}
break;
@@ -6331,7 +6333,10 @@ mystique_init(const device_t *info)
else
romfn = ROM_MYSTIQUE_220;
rom_init(&mystique->bios_rom, romfn, 0xc0000, 0x8000, 0x7fff, 0, MEM_MAPPING_EXTERNAL);
if (mystique->type == MGA_G100)
rom_init(&mystique->bios_rom, romfn, 0xc0000, 0x10000, 0xffff, 0, MEM_MAPPING_EXTERNAL);
else
rom_init(&mystique->bios_rom, romfn, 0xc0000, 0x8000, 0x7fff, 0, MEM_MAPPING_EXTERNAL);
mem_mapping_disable(&mystique->bios_rom.mapping);
mystique->vram_size = device_get_config_int("memory");