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Mapper 205: Fix for split-rom variant (UNIF)

This commit is contained in:
negative 2023-03-06 14:42:25 +08:00
parent 012fbca2d8
commit 0aa49a5627
1 changed files with 11 additions and 3 deletions
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14
src/boards/mmc3.cpp
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@ -1144,12 +1144,20 @@ https://wiki.nesdev.com/w/index.php/INES_Mapper_205 */
static void M205PW(uint32 A, uint8 V) { static void M205PW(uint32 A, uint8 V) {
uint8 bank = V & ((EXPREGS[0] & 0x02) ? 0x0F : 0x1F); uint8 bank = V & ((EXPREGS[0] & 0x02) ? 0x0F : 0x1F);
setprg8(A, EXPREGS[0] << 4 | bank); if (PRGsize[1]) { // split-rom variant
setprg8r((EXPREGS[0] & 3) ? (EXPREGS[0] - 1) : 0, A, bank);
} else {
setprg8(A, EXPREGS[0] << 4 | bank);
}
} }
static void M205CW(uint32 A, uint8 V) { static void M205CW(uint32 A, uint8 V) {
uint8 bank = V & ((EXPREGS[0] & 0x02) ? 0x7F : 0xFF); uint8 bank = V & ((EXPREGS[0] & 0x02) ? 0x7F : 0xFF);
setchr1(A, (EXPREGS[0] << 7) | bank); if (CHRsize[1]) { // split-rom variant
setchr1r((EXPREGS[0] & 3) ? (EXPREGS[0] - 1) : 0, A, bank);
} else {
setchr1(A, (EXPREGS[0] << 7) | bank);
}
} }
static DECLFW(M205Write) { static DECLFW(M205Write) {
@ -1175,7 +1183,7 @@ static void M205Power(void) {
} }
void Mapper205_Init(CartInfo *info) { void Mapper205_Init(CartInfo *info) {
GenMMC3_Init(info, 256, 128, 8, 0); GenMMC3_Init(info, 256, 128, 0, 0);
pwrap = M205PW; pwrap = M205PW;
cwrap = M205CW; cwrap = M205CW;
info->Power = M205Power; info->Power = M205Power;