Int 14 Fn 11  - Pc-mos/386 V5.01 $serial.sys V5.04 - Disable Port          [S]

   AH = 11h
   DX = port number

Return: AL = status
       00h successful
       01h IRQ for port is shared
       02h IRQ was reserved

See Also: AH=04h"SERIAL",AH=05h"SERIAL",AH=12h"PC-MOS"