Int 14 Fn 20  - Alloy Mw386 - Attach Logical Communications Port To Physi  [S]

   AH = 20h
   AL = logical port (01h COM1, 02h COM2)
   DX = physical port number

Return: AX = status
       0000h successful
       FFFFh failed

See Also: AH=21h"Alloy",AH=22h"Alloy",AH=23h"Alloy",INT 17/AH=8Bh"Alloy"