CTSIE
new_reg = up->curregs[R15] | (DCDIE | SYNCIE | CTSIE);
uap->curregs[R15] |= DCDIE | SYNCIE | CTSIE;
uap->curregs[R15] &= ~(DCDIE | SYNCIE | CTSIE);
new_reg = uap->curregs[R15] | (DCDIE | SYNCIE | CTSIE);
new_reg = up->curregs[R15] | (DCDIE | SYNCIE | CTSIE);
mmask = ((mask_b & CTSIE) ? TIOCM_CTS : 0) |
zport->regs[15] &= ~(DCDIE | CTSIE);
zport->regs[15] |= DCDIE | CTSIE;
zport->regs[15] |= CTSIE;
zport->regs[15] &= ~CTSIE;