SERIAL_LINE_CONTROL
out8(0x80, sSerialBasePort + SERIAL_LINE_CONTROL);
out8(3, sSerialBasePort + SERIAL_LINE_CONTROL);
out8(0x80, sSerialBasePort + SERIAL_LINE_CONTROL); /* set divisor latch access bit */
out8(3, sSerialBasePort + SERIAL_LINE_CONTROL); /* 8N1 */