CSR_CLRBIT        675 dev/ic/mtd8xx.c 		CSR_CLRBIT(MTD_TCRRCR, RCR_PROM);
CSR_CLRBIT        680 dev/ic/mtd8xx.c 		CSR_CLRBIT(MTD_TCRRCR, RCR_AB);
CSR_CLRBIT        775 dev/ic/mtd8xx.c 	CSR_CLRBIT(MTD_TCRRCR, (RCR_RE | TCR_TE));