ac_da
timeout = KBD->ac_da;
timeout = KBD->ac_da;
(void)KBD->ac_da;
code = KBD->ac_da;
code = KBD->ac_da;
KBD->ac_da = *sc->sc_sendp++;
code = KBD->ac_da; /* Silently ignore errors */
code = KBD->ac_da;
KBD->ac_da = *cmd++;
KBD->ac_da = *cmd++;