SER_CTS
| (!(status & SER_CTS) ? TIOCM_CTS : 0);
if(!(status & SER_CTS))
ciab.ddra &= ~(SER_DCD | SER_CTS | SER_DSR); /* inputs */
unsigned char status = ciab.pra & (SER_DCD | SER_CTS | SER_DSR);
if (dstatus & SER_CTS)
if (!(status & SER_CTS)) {
if ((status & SER_CTS)) {
current_ctl_bits = ciab.pra & (SER_DCD | SER_CTS | SER_DSR);