CCBDISP_FREE
send_pdu(ccb, ppdu, (rx_pdu != NULL) ? CCBDISP_NOWAIT : CCBDISP_FREE,
send_pdu(ccb, ppdu, (wait) ? CCBDISP_WAIT : CCBDISP_FREE, PDUDISP_FREE);
ccb->ccb_disp <= CCBDISP_FREE ||
send_pdu(ccb, pdu, CCBDISP_FREE, PDUDISP_WAIT);
case CCBDISP_FREE: