struct HuC1 : MMIO {
bool ram_writable; //$0000-1fff
uint8 rom_select; //$2000-3fff
uint8 ram_select; //$4000-5fff
bool model; //$6000-7fff
uint8 mmio_read(uint16 addr);
void mmio_write(uint16 addr, uint8 data);
void power();
} huc1;