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games/nes: add mapper 7 support

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This commit is contained in:
cinap_lenrek 2014-02-16 21:40:33 +01:00
parent cd27c0cca2
commit 87fcb107ef
1 changed files with 12 additions and 0 deletions
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12
sys/src/games/nes/mem.c
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@ -108,9 +108,21 @@ t:
n = 0;
}
static void
mmc7(int v, u8int p)
{
if(v < 0){
nrom(-1, 0);
p = 0;
}
prgb[0] = prg + (p & 3) * 0x8000;
prgb[1] = prgb[0] + 0x4000;
}
void (*mapper[256])(int, u8int) = {
[0] nrom,
[1] mmc1,
[7] mmc7,
};
static void