Int 17 Fn FF  U - Pc-mos/386 V5.01 - Print Spooler - Close Spool File      [c]

   AH = FFh
   BX = 0000h
   CX = 0000h
   DX = printer port number

Return: AH = printer status (see #0555 at AH=00h)
Program: PC-MOS/386 v5.01 is a multitasking, multiuser MS-DOS 5.0-compatible
     operating system by The Software Link, Inc.
Desc:  close the spool file immediately instead of waiting for the close time
     to elapse

See Also: AH=01h,AH=03h"PC-MOS"