diff options
Diffstat (limited to 'mappers/mapper_003_2.c')
| -rw-r--r-- | mappers/mapper_003_2.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/mappers/mapper_003_2.c b/mappers/mapper_003_2.c index e93916a..b780a8f 100644 --- a/mappers/mapper_003_2.c +++ b/mappers/mapper_003_2.c @@ -1,21 +1,26 @@ +__attribute__((section(".mapper_003_2"), hot)) static uint8_t mapper_003_2_prg_read(struct nes_state *state, uint32_t addr) { return state->prg_rom[addr & 0x7fff]; } +__attribute__((section(".mapper_003_2"), hot)) static void mapper_003_2_prg_write(struct nes_state *state, uint32_t addr, uint8_t value) { struct mapper_003_2 *mapper = (struct mapper_003_2 *)&state->map; if(addr >= 0x8000) { + value &= state->prg_rom[addr & 0x7fff]; mapper->chr_ptr = state->chr_rom + (value & 3) * 0x2000; } } +__attribute__((section(".mapper_003_2"), hot)) static uint8_t mapper_003_2_chr_read(struct nes_state *state, uint32_t addr) { struct mapper_003_2 *mapper = (struct mapper_003_2 *)&state->map; return mapper->chr_ptr[addr]; } +__attribute__((section(".mapper_003_2"))) static void mapper_003_2_init(struct nes_state *state) { struct mapper_003_2 *mapper = (struct mapper_003_2 *)&state->map; |