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INT 14h,  00h    Set baud rate

      Entry:  AL         Baud rate code

              DX         Port number

      Exit:   AX         Port status (see function 03h)

    This works the same as the  equivalent IBM PC BIOS call,  except that it
    ONLY selects a baud rate.  This is passed in the high order 3 bits of AL
    as follows:

                010 =   300 baud
                011 =   600  ''
                100 =  1200  ''
                101 =  2400  ''
                110 =  4800  ''
                111 =  9600  ''
                000 = 19200  '' (Replaces old 110 baud mask)
                001 = 38400  '' (Replaces old 150 baud mask)

    The low order 5 bits can be implemented or not by the FOSSIL, but in all
    cases, if the low order bits of AL are 00011,  the result should be that
    the communications device should be set to eight data bits, one stop bit
    and no parity. This setting is a  MINIMUM REQUIREMENT  of Fido, Opus and
    SEAdog.  For purposes of completeness,  here are the IBM PC "compatible"
    bit settings:

    Bits 4-3 define parity:     0 0       no parity
                                1 0       no parity
                                0 1      odd parity
                                1 1     even parity

    Bit 2 defines stop bits:      0        1 stop bit;
                                  1      1.5 bits for 5-bit char;
                                           2 for others

    Bits 1-0 character length:  0 0        5 bits
                                0 1        6 bits
                                1 0        7 bits
                                1 1        8 bits