mappers/mapper_000_0.c


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__attribute__((hot))
static uint8_t mapper_000_0_prg_read(struct nes_state *state, uint32_t addr) {
	struct mapper_000_0 *mapper = (struct mapper_000_0 *)&state->map;

	return state->prg_rom[addr & mapper->mask];
}

__attribute__((hot))
static uint8_t mapper_000_0_chr_read(struct nes_state *state, uint32_t addr) {
	return state->chr_rom[addr];
}

static void mapper_000_0_init(struct nes_state *state) {
	struct mapper_000_0 *mapper = (struct mapper_000_0 *)&state->map;
	state->mapper.prg_read = mapper_000_0_prg_read;
	state->mapper.chr_read = mapper_000_0_chr_read;
	mapper->mask = (state->ines.prg_size == 16384) ? 0x3fff : 0x7fff;
}