Lines Matching defs:istat
961 int istat, unit;
965 istat = regs->du_isr & scc->imask;
966 if (istat == 0)
969 if (istat & 0x02) { /* channel A receive interrupt */
990 if (istat & 0x20) { /* channel B receive interrupt */
1011 if (istat & 0x01) { /* channel A transmit interrupt */
1023 if (istat & 0x10) { /* channel B transmit interrupt */
1035 if (istat & 0x80) { /* input port change interrupt */
1137 u_char stat, last, istat;
1160 istat = stat ^ last;
1162 if ((istat & (0x10 << (unit & 1))) && /* CD changed */