SYNCIE
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);
((mask_a & SYNCIE) ? TIOCM_DSR : 0);
zport_a->regs[15] &= ~(DCDIE | SYNCIE);
if (!(zport->regs[15] & (DCDIE | SYNCIE)))
zport_a->regs[15] |= DCDIE | SYNCIE;