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Mapper 432: Add NROM-256 mode and second DIP switchb it.

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NewRisingSun
2022-03-01 15:28:58 +01:00
parent 1c8c63b124
commit 98244a1c17
1 changed files with 3 additions and 3 deletions
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6
src/boards/432.c
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@@ -32,12 +32,12 @@ static void M432CW(uint32 A, uint8 V) {
static void M432PW(uint32 A, uint8 V) {
int prgAND = (EXPREGS[1] & 0x02) ? 0x0F : 0x1F;
int prgOR = ((EXPREGS[1] << 4) & 0x10) | (EXPREGS[1] << 1) & 0x20;
if ((A < 0xC000) || (~EXPREGS[1] & 0x40)) setprg8(A, (V & prgAND) | (prgOR & ~prgAND));
if ((A < 0xC000) && (EXPREGS[1] & 0x40)) setprg8(A | 0x4000, (V & prgAND) | (prgOR & ~prgAND));
if ((A < 0xC000) || (~EXPREGS[1] & 0x40)) setprg8(A, (V & prgAND) | (prgOR & ~prgAND) & (EXPREGS[1] & 0x80?~2:~0));
if ((A < 0xC000) && (EXPREGS[1] & 0x40)) setprg8(A | 0x4000, (V & prgAND) | (prgOR & ~prgAND) | (EXPREGS[1] & 0x80? 2: 0));
}
static DECLFR(M432Read) {
if (EXPREGS[0] & 1)
if (EXPREGS[0] & 1 || EXPREGS[1] & 0x20)
return EXPREGS[2];
return CartBR(A);
}