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static uint8_t mapper_066_0_prg_rom_read(struct nes_state *state, uint32_t addr) {
struct mapper_066_0 *mapper = &state->mapper_data.m066_0;
return mapper->prg_offset[addr & 0x7fff];
}
static void mapper_066_0_prg_rom_write(struct nes_state *state, uint32_t addr, uint8_t value) {
struct mapper_066_0 *mapper = &state->mapper_data.m066_0;
uint32_t prg_bank = (value >> 4) & 3;
uint32_t chr_bank = (value >> 0) & 3;
mapper->prg_offset = state->prg_rom + (prg_bank * 0x8000);
mapper->chr_offset = state->chr_rom + (chr_bank * 0x2000);
}
static uint8_t mapper_066_0_chr_read(struct nes_state *state, uint32_t addr) {
struct mapper_066_0 *mapper = &state->mapper_data.m066_0;
return mapper->chr_offset[addr];
}
static void mapper_066_0_init(struct nes_state *state) {
struct mapper_066_0 *mapper = &state->mapper_data.m066_0;
mapper->prg_offset = state->prg_rom;
mapper->chr_offset = state->chr_rom;
state->mapper_function.prg_rom_read = mapper_066_0_prg_rom_read;
state->mapper_function.prg_rom_write = mapper_066_0_prg_rom_write;
state->mapper_function.chr_read = mapper_066_0_chr_read;
}
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