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Merge pull request #112 from retro-wertz/update

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Mapper57: fix mirroring and attempt to fix mapping with some titles...
This commit is contained in:
Twinaphex
2017-05-01 21:52:17 +02:00
committed by GitHub
parent 050f1822eb 8d5ebaf9f3
commit ffbadf4c41
1 changed files with 8 additions and 6 deletions
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14
src/boards/57.c
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@@ -34,14 +34,16 @@ static SFORMAT StateRegs[] =
}; };
static void Sync(void) { static void Sync(void) {
if (prg_reg & 0x80) if (prg_reg & 0x10)
setprg32(0x8000, prg_reg >> 6); setprg32(0x8000, (prg_reg >> 6) & 3);
else { else {
setprg16(0x8000, (prg_reg >> 5) & 3); setprg16(0x8000, (prg_reg >> 5) & 7);
setprg16(0xC000, (prg_reg >> 5) & 3); setprg16(0xC000, (prg_reg >> 5) & 7);
} }
setmirror((prg_reg & 8) >> 3); // Mirroring (0=Vert, 1=Horz)
setchr8((chr_reg & 3) | (prg_reg & 7) | ((prg_reg & 0x10) >> 1)); // https://wiki.nesdev.com/w/index.php/INES_Mapper_057
setmirror((prg_reg & 8) ? MI_H : MI_V);
setchr8((chr_reg & 7) | (prg_reg & 7) | ((chr_reg & 0x40) >> 3));
} }
static DECLFR(M57Read) { static DECLFR(M57Read) {