diff options
Diffstat (limited to 'sys/src/games/snes/mem.c')
| -rw-r--r-- | sys/src/games/snes/mem.c | 36 |
1 files changed, 29 insertions, 7 deletions
diff --git a/sys/src/games/snes/mem.c b/sys/src/games/snes/mem.c index 9fd17aa86..330615d27 100644 --- a/sys/src/games/snes/mem.c +++ b/sys/src/games/snes/mem.c @@ -21,6 +21,8 @@ enum { OPVCTH, }; +extern void calc7(void); + static void incvram(int i, int r) { @@ -220,15 +222,29 @@ regwrite(u16int p, u8int v) oam[oamaddr & 0x21f] = v; oamaddr = (oamaddr + 1) & 0x3ff; return; - case 0x210d: case 0x210f: - case 0x2111: case 0x2113: + case 0x2105: + reg[p] = v; + calc7(); + return; + case 0x210d: + hofs[4] = (v & 0x1f) << 8 | reg[M7PREV]; + if((v & 0x10) != 0) + hofs[4] |= 0xe000; + reg[M7PREV] = v; + calc7(); + case 0x210f: case 0x2111: case 0x2113: a = (p - 0x210d) >> 1; - hofs[a] = (v << 8) | reg[OFSPREV] & ~7 | (hofs[a] >> 8) & 7; + hofs[a] = v << 8 | reg[OFSPREV] & ~7 | (hofs[a] >> 8) & 7; reg[OFSPREV] = v; break; - case 0x210e: case 0x2110: - case 0x2112: case 0x2114: - vofs[(p - 0x210e) >> 1] = (v << 8) | reg[OFSPREV]; + case 0x210e: + vofs[4] = (v & 0x1f) << 8 | reg[M7PREV]; + if((v & 0x10) != 0) + vofs[4] |= 0xe000; + reg[M7PREV] = v; + calc7(); + case 0x2110: case 0x2112: case 0x2114: + vofs[(p - 0x210e) >> 1] = v << 8 | reg[OFSPREV]; reg[OFSPREV] = v; break; case 0x2116: @@ -248,8 +264,14 @@ regwrite(u16int p, u8int v) return; case 0x211b: case 0x211c: case 0x211d: case 0x211e: case 0x211f: case 0x2120: - m7[p - 0x211b] = (v << 8) | reg[M7PREV]; + m7[p - 0x211b] = v << 8 | reg[M7PREV]; + if(p >= 0x211f) + if((v & 0x10) != 0) + m7[p - 0x211b] |= 0xe000; + else + m7[p - 0x211b] &= 0x1fff; reg[M7PREV] = v; + calc7(); break; case 0x2121: reg[CGLH] = 0; |