fcomcnattach
int fcomcnattach(u_int, int, tcflag_t);
int fcomcnattach(u_int iobase, int rate, tcflag_t cflag);
fcomcnattach(DC21285_ARMCSR_VBASE, comcnspeed, comcnmode);
fcomcnattach(DC21285_ARMCSR_VBASE, comcnspeed, comcnmode);
fcomcnattach(DC21285_ARMCSR_VBASE, comcnspeed, comcnmode);