diff options
Diffstat (limited to 'sys/src/games/snes/mem.c')
| -rw-r--r-- | sys/src/games/snes/mem.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/sys/src/games/snes/mem.c b/sys/src/games/snes/mem.c index af22cba44..9cc0469db 100644 --- a/sys/src/games/snes/mem.c +++ b/sys/src/games/snes/mem.c @@ -348,9 +348,12 @@ memread(u32int a) al = a; b = (a>>16) & 0x7f; if(al < 0x8000){ - if(b < 0x40) + if(b < 0x40){ + if(hirom && al >= 0x6000 && nsram != 0) + return sram[(b << 13 | al & 0x1ffff) & (nsram - 1)]; return regread(al); - if((b & 0xf8) == (hirom ? 0x20 : 0x70) && nsram != 0) + } + if(!hirom && (b & 0xf8) == 0x70 && nsram != 0) return sram[a & 0x07ffff & (nsram - 1)]; } if(b >= 0x7e && (a & (1<<23)) == 0) @@ -372,11 +375,16 @@ memwrite(u32int a, u8int v) mem[a - 0x7e0000] = v; if(al < 0x8000){ if(b < 0x40){ + if(hirom && al >= 0x6000 && nsram != 0){ + sram[(b << 13 | al & 0x1fff) & (nsram - 1)] = v; + goto save; + } regwrite(a, v); return; } - if((b & 0xf8) == (hirom ? 0x20 : 0x70) && nsram != 0){ + if(!hirom && (b & 0xf8) == 0x70 && nsram != 0){ sram[a & 0x07ffff & (nsram - 1)] = v; + save: if(saveclock == 0) saveclock = SAVEFREQ; return; |