RCA
EPKT_DESC(PORT, PIO, IRR, RCA, WRITE),
return (inb(port + LSR) & RCA);
return ((INB(LSR) & RCA) != 0);
if (lsr & (RCA|PARERR|FRMERR|BRKDET|OVRRUN)) {
while (lsr & (RCA|PARERR|FRMERR|BRKDET|OVRRUN)) {
if (lsr & RCA) {