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Mapper 314: Add support for 4 MiB variant.

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NewRisingSun
2025-09-08 16:37:15 +02:00
parent da42e08e1a
commit 03c7199a42
1 changed files with 7 additions and 9 deletions
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16
src/boards/bmc64in1nr.c
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@@ -31,17 +31,17 @@ static SFORMAT StateRegs[] =
};
static void Sync(void) {
int prg = regs[0] <<7 &0x80 | regs[1] <<1 &0x7E | regs[1] >>6 &0x01;
if (regs[0] & 0x80) { /* NROM mode */
if (regs[1] & 0x80)
setprg32(0x8000, regs[1] & 0x3F);
setprg32(0x8000, prg >>1);
else {
int bank = ((regs[1] & 0x3F) << 1) | ((regs[1] >> 6) & 1);
setprg16(0x8000, bank);
setprg16(0xC000, bank);
setprg16(0x8000, prg);
setprg16(0xC000, prg);
}
} else { /* UNROM mode */
setprg16(0x8000, regs[1] <<1 | regs[3] &7);
setprg16(0xC000, regs[1] <<1 | 7);
setprg16(0x8000, prg &~7 | regs[3] &7);
setprg16(0xC000, prg | 7);
}
if (regs[0] & 0x20)
setmirror(MI_H);
@@ -51,9 +51,7 @@ static void Sync(void) {
}
static DECLFW(BMC64in1nrWriteLo) {
A &=3;
if (A ==3) A =1; /* K-42001's "Aladdin III" */
regs[A & 3] = V;
regs[A &(VROM_size? 3: 1)] = V;
Sync();
}