diff options
| author | cinap_lenrek <cinap_lenrek@felloff.net> | 2014-02-16 21:40:33 +0100 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@felloff.net> | 2014-02-16 21:40:33 +0100 |
| commit | 87fcb107ef333f5dce7618e0f4c73d69ebc75eb5 (patch) | |
| tree | 54ad75bd4eabbbb6009db45998520645494257af /sys/src | |
| parent | cd27c0cca2d72e467c26c78097b059b8e5a74c87 (diff) | |
games/nes: add mapper 7 support
Diffstat (limited to 'sys/src')
| -rw-r--r-- | sys/src/games/nes/mem.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/sys/src/games/nes/mem.c b/sys/src/games/nes/mem.c index ff5ecc2dd..1354678d8 100644 --- a/sys/src/games/nes/mem.c +++ b/sys/src/games/nes/mem.c @@ -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 |