mappers/mapper_011_0.c


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static uint8_t mapper_011_0_prg_rom_read(struct nes_state *state, uint32_t addr) {
	struct mapper_011_0 *mapper = &state->mapper_data.m011_0;
	return mapper->prg_rom[addr & 0x7fff];
}

static void mapper_011_0_prg_rom_write(struct nes_state *state, uint32_t addr, uint8_t value) {
	struct mapper_011_0 *mapper = &state->mapper_data.m011_0;

	mapper->prg_rom = state->prg_rom + (value & 0x3) * 0x8000;
	mapper->chr_rom = state->chr_rom + ((value >> 4) & 0x3) * 0x2000;
}

static uint8_t mapper_011_0_chr_read(struct nes_state *state, uint32_t addr) {
	struct mapper_011_0 *mapper = &state->mapper_data.m011_0;

	return mapper->chr_rom[addr];
}

static void mapper_011_0_init(struct nes_state *state) {
	struct mapper_011_0 *mapper = &state->mapper_data.m011_0;

	mapper->prg_rom = state->prg_rom;
	mapper->chr_rom = state->chr_rom;

	state->mapper_function.prg_rom_read		= mapper_011_0_prg_rom_read;
	state->mapper_function.prg_rom_write	= mapper_011_0_prg_rom_write;
	state->mapper_function.chr_read			= mapper_011_0_chr_read;
}