KBD_DISABLE_KBD_PORT
sc->ram[0] |= KBD_DISABLE_KBD_PORT;
sc->ram[0] &= ~KBD_DISABLE_KBD_PORT;
} else if (sc->kbd.bcnt > 0 && (sc->ram[0] & KBD_DISABLE_KBD_PORT) == 0) {
#define KBD_KBD_CONTROL_BITS (KBD_DISABLE_KBD_PORT | KBD_ENABLE_KBD_INT)