static void mapper_nrom_init(struct nes_state *state) { // Nothing to initialize for NROM } static uint8_t mapper_nrom_read(struct nes_state *state, uint32_t addr) { uint32_t prg_size = state->ines.prg_size; uint32_t mask = (state->ines.prg_size == 16384) ? 0x3fff : 0x7fff; return state->rom[addr & mask]; } static void mapper_nrom_write(struct nes_state *state, uint32_t addr, uint8_t value) { (void)state; (void)addr; (void)value; } static void mapper_nrom_tick(struct nes_state *state) { (void)state; }