Lines Matching refs:DCD
363 /* DCD/CTS and Rx/Tx errors */
440 /* ABORT: generated whenever DCD drops while receiving */
445 /* HUNT: software DCD; on = waiting for SYNC, off = receiving frame */
462 /* DCD: on = start to receive packet, off = ABORT condition */
465 if((changes & DCD) && !scc->kiss.softdcd) /* DCD input changed state */
467 if(status & DCD) /* DCD is now ON */
471 } else { /* DCD is now OFF */
862 if(scc->kiss.softdcd || (InReg(scc->ctrl,R0) & DCD))
863 /* DCD is now ON */
868 /* enable ABORT, DCD & SYNC/HUNT interrupts */
923 cl(scc, R15, DCDIE|SYNCIE); /* No DCD changes, please */
1116 * fulldup == 0: DCD is active or Rand > P-persistence: start t_busy timer
1209 * throw away send buffers if DCD remains active too long.