diff options
Diffstat (limited to 'mapper_066.c')
| -rw-r--r-- | mapper_066.c | 37 |
1 files changed, 34 insertions, 3 deletions
diff --git a/mapper_066.c b/mapper_066.c index aabf471..7a2b542 100644 --- a/mapper_066.c +++ b/mapper_066.c @@ -4,15 +4,15 @@ static void mapper_066_init(struct nes_state *state) { state->map.m066.chr_offset = 0; } -static uint8_t mapper_066_read(struct nes_state *state, uint32_t addr) { +static uint8_t mapper_066_prg_read(struct nes_state *state, uint32_t addr) { if(addr >= 0x8000) { uint32_t base = state->map.m066.prg_offset; - return state->rom[base + (addr - 0x8000)]; + return state->prg_rom[base + (addr - 0x8000)]; } return 0; } -static void mapper_066_write(struct nes_state *state, uint32_t addr, uint8_t value) { +static void mapper_066_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; @@ -22,6 +22,37 @@ static void mapper_066_write(struct nes_state *state, uint32_t addr, uint8_t val } } +static uint8_t mapper_066_chr_read(struct nes_state *state, uint32_t addr) { + return state->chr_rom[state->map.m066.chr_offset + addr]; +} + +static void mapper_066_chr_write(struct nes_state *state, uint32_t addr, uint8_t value) { +} + +static uint8_t mapper_066_ciram_read(struct nes_state *state, uint32_t addr) { + uint32_t mirrored = addr & 0x0fff; + + if(state->ines.mirroring == 0) { // Horizontal + mirrored = (mirrored & 0x800) | (mirrored & 0x3ff); + } else { // Vertical (default fallback) + mirrored = mirrored & 0x7ff; + } + + return state->ciram[mirrored]; +} + +static void mapper_066_ciram_write(struct nes_state *state, uint32_t addr, uint8_t value) { + uint32_t mirrored = addr & 0x0fff; + + if(state->ines.mirroring == 0) { + mirrored = (mirrored & 0x800) | (mirrored & 0x3ff); + } else { + mirrored = mirrored & 0x7ff; + } + + state->ciram[mirrored] = value; +} + static void mapper_066_tick(struct nes_state *state) { // No IRQ or timing logic needed } |