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Mapper 432: Add 1 MiB variant

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NewRisingSun 2022-08-04 21:46:42 +02:00
parent f3f1e1f916
commit 24bc7a43bd
1 changed files with 4 additions and 4 deletions
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8
src/boards/432.c
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@ -25,26 +25,26 @@
static void M432CW(uint32 A, uint8 V) {
int chrAND = (EXPREGS[1] & 0x04) ? 0x7F : 0xFF;
int chrOR = (EXPREGS[1] << 7) & 0x080 | (EXPREGS[1] << 5) & 0x100;
int chrOR = (EXPREGS[1] << 7) & 0x080 | (EXPREGS[1] << 5) & 0x100 | (EXPREGS[1] << 4) & 0x200;
setchr1(A, (V & chrAND) | (chrOR & ~chrAND));
}
static void M432PW(uint32 A, uint8 V) {
int prgAND = (EXPREGS[1] & 0x02) ? 0x0F : 0x1F;
int prgOR = ((EXPREGS[1] << 4) & 0x10) | (EXPREGS[1] << 1) & 0x20;
int prgOR = ((EXPREGS[1] << 4) & 0x10) | (EXPREGS[1] << 1) & 0x60;
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 || EXPREGS[1] & 0x20)
if (EXPREGS[0] & 1 || EXPREGS[1] & 0x20 && ROM_size <64)
return EXPREGS[2];
return CartBR(A);
}
static DECLFW(M432Write) {
EXPREGS[A & 1] = V;
if (~A &1 && ~V &1) EXPREGS[1] &=~0x20; /* Writing 0 to register 0 clears register 1's DIP bit */
if (~A &1 && ~V &1 && ROM_size <64) EXPREGS[1] &=~0x20; /* Writing 0 to register 0 clears register 1's DIP bit */
FixMMC3PRG(MMC3_cmd);
FixMMC3CHR(MMC3_cmd);
}