diff options
Diffstat (limited to 'mapper_0042.c')
| -rw-r--r-- | mapper_0042.c | 30 |
1 files changed, 0 insertions, 30 deletions
diff --git a/mapper_0042.c b/mapper_0042.c deleted file mode 100644 index 4cf4c86..0000000 --- a/mapper_0042.c +++ /dev/null @@ -1,30 +0,0 @@ - -static void mapper_0042_init(struct nes_state *state) { - state->map.m0042.prg_offset = 0; - state->map.m0042.chr_offset = 0; -} - -static uint8_t mapper_0042_prg_read(struct nes_state *state, uint32_t addr) { - if(addr >= 0x8000) { - uint32_t base = state->map.m0042.prg_offset; - return state->prg_rom[base + (addr - 0x8000)]; - } - return 0; -} - -static void mapper_0042_prg_write(struct nes_state *state, uint32_t addr, uint8_t value) { - if(addr >= 0x8000) { - uint32_t prg_bank = (value >> 4) & 3; - uint32_t chr_bank = (value >> 0) & 3; - - state->map.m0042.prg_offset = prg_bank * 0x8000; - state->map.m0042.chr_offset = chr_bank * 0x2000; - } -} - -static uint8_t mapper_0042_chr_read(struct nes_state *state, uint32_t addr) { - return state->chr_rom[state->map.m0042.chr_offset + addr]; -} - -static void mapper_0042_chr_write(struct nes_state *state, uint32_t addr, uint8_t value) { -} |