OUTP
OUTP(IER, 0);
OUTP(FCR, 0x00); /* no FIFO mode */
OUTP(LCR, INP(LCR) | LCR_DLAB);
OUTP(DLM, 0xff & (diviser>>8));
OUTP(DLL, 0xff & diviser);
OUTP(LCR, INP(LCR) & ~LCR_DLAB);
OUTP(MCR, 0);
OUTP(LCR, 0x03); /* 8 bit , no parity, 1 stop */
OUTP(MCR, RTS_MODE | MCR_OUT2);
OUTP(THR, c);