Int 14 Fn 23  - Pc-mos/386 V5.01 $serial.sys V5.04 - Declare Port Ownersh  [S]

   AH = 23h
   DX = port number
   BX = TCB segment/selector address of owner task

Return: nothing

See Also: AH=0Dh"Digiboard",AH=21h"PC-MOS",AH=22h"PC-MOS"