TXCON_LOOPBACK_D2 1447 dev/ic/smc83c170.c 		txcon |= (TXCON_LOOPBACK_D1|TXCON_LOOPBACK_D2);
TXCON_LOOPBACK_D2 1449 dev/ic/smc83c170.c 		txcon &= ~(TXCON_LOOPBACK_D1|TXCON_LOOPBACK_D2);