ZSRR1_DO          126 dev/ic/z8530sc.c 		if (rr1 & (ZSRR1_FE | ZSRR1_DO | ZSRR1_PE)) {
ZSRR1_DO          935 dev/ic/z8530tty.c 	if (ch_rr1 & (ZSRR1_FE | ZSRR1_DO | ZSRR1_PE)) {
ZSRR1_DO         1153 dev/ic/z8530tty.c 		if (ring_data & ZSRR1_DO)