This information was accidentally left out of the documention for
using the net14 driver.  The net14 driver is a shell which installs
inself to manage the interrupt 14h for serial communications and
re-direct int 14h reads and writes to/from the ethernet network.
It then starts up another program which uses the int 14h interface
with the following programming interface:

Int 14h Function 00H:   Initialize communications
    Call With:
        AH = 00H
        AL = Ignored (serial communication programs use this for
                additional communication parameters, which are un-used
                in the net14 driver).
        DX = Comm. port number to initialize

    Returns:
        AH is returned with the port status:
            Bit:        Meaning (if set):
            ----        -----------------
             7          Timed-out
             6          Transmit shift register empty
             5          Transmit holding register empty
             4          Break detected
             3          Framing error detected
             2          Parity error detected
             1          Overrun error detected
             0          Receive data ready

        AL has the modem status:
            Bit:        Meaning (if set):
            ----        -----------------
             7          Receive line signal detect
             6          Ring indicator
             5          Data-set-ready
             4          Clear-to-send
             3          Change in receive line signal detect
             2          Trailing edge ring indicator
             1          Change in data-set-ready status
             0          Change in clear-to-send status

Int 14h Function 01H:   Send Character
    Call With:
        AH = 01H
        AL = Character
        DX = Comm. port to send through
    Returns:
        Bit 7 of AH is zero if successful, otherwise Bit 7 of AH is one.

Int 14h Function 02H:   Receive Character
    Call With:
        AH = 02H
        DX = Comm. port to receive from

    Returns:
        Bit 7 of AH is zero if successful, otherwise Bit 7 of AH is one.
        Character read is in AL if the call was successful.

Int 14h Function 03H:   Get Comm. Port Status
    Call With:
        AH = 03H
        DX = Comm. port to get status of

    Returns:
        AH is returned with the port status, and AL has the modem status.
        (See function 00H above)


Notes:
    In order to establish a connection, the following steps must be
followed in order:

1.  Call function 00H with the port to initialize.
2.  Send the following sequence to the port: one ascii 03 code
    (control-C), the name of the machine to connect to (or its
    IP address) one character at a time, and the ascii 02 code
    (control-B).

    Following a connection being established, the net14 driver
will ignore any control-C's and control-B's in the data stream
send or received.  A connection can be closed by re-initializing
the comm. port (function 00H).