INT 14 - Connection Manager - MODIFY DEFAULT CONNECTION PARAMETERS
        AH = 00h
        DX = FFFFh
        ES:DI -> vector string specifying new parameters
Return: AH = return code (00h,03h) (see below)
Program: Connection Manager by Softwarehouse Corp. permits the sharing of
          serial ports over an IPX or NetBIOS-based network
Note:   if DX is 0-3 on entry, Connection Manager emulates the standard BIOS
          function, but redirects the port over the network; if DX is any other
          value, the call is chained
SeeAlso: AH=04h/DX=FFFFh,AH=08h/DX=FFFFh,AH=0Ah/DX=FFFFh

Values for return code:
 00h    successful
 01h    no such connection
 02h    invalid connection ID
 03h    invalid subvector found
 04h    communication error (check BH)
 06h    insufficient resources, retry later
 FFh    no data available

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