INT 14 - Alloy MW386 v2+ - CHANGE PHYSICAL PORT PARAMETERS
        AH = 24h
        CX = physical I/O port number
        DS:DX -> configuration table (see below)
Return: AH = 00h
Note:   invalid port numbers are merely ignored

Format of configuration table:
Offset  Size    Description
 00h    BYTE    baud rate
                00h 38400
                01h 19200
                02h  9600
                03h  7200
                04h  4800
                05h  3600
                06h  2400
                07h  2000
                08h  1200
                09h   600
                0Ah   300
                0Bh   150
                0Ch   134.5
 01h    BYTE    data bits (00h=5, 01h=6, 02h=7, 03h=8)
 02h    BYTE    parity (00h none, 01h odd, 02h even)
 03h    BYTE    stop bits (00h=1, 01h=2)
 04h    BYTE    receive flow control
                00h none, 01h XON/XOFF, 02h DTR/DSR, 03h XPC, 04h RTS/CTS
 05h    BYTE    transmit flow control (as for receive)