memset(&Pico_mcd->m, 0, sizeof(Pico_mcd->m));
memset(Pico_mcd->bios + 0x70, 0xff, 4); // reset hint vector (simplest way to implement reg6)
memset(&Pico_mcd->m, 0, sizeof(Pico_mcd->m));
memset(Pico_mcd->bios + 0x70, 0xff, 4); // reset hint vector (simplest way to implement reg6)