Int 2F Fn 01  U - Dos 2.x Only Print.com - Remove File From Print Queue    [c]

   AH = 01h
   DS:DX -> FCB (see #1034 at INT 21/AH=0Fh) for file to be canceled

Return: AH = number of files currently in print queue
   AL = 00h (successful)
   ES:BX -> print queue (10 FCBs; first byte of FFh indicates unused)
   ES:DX -> currently-printing FCB (if DX=FFFFh, none printing)

Notes: DOS 2.x PRINT.COM does not chain to previous INT 2F handler
   values in AH other than 00h or 01h cause PRINT to return the number of
     files in the queue in AH

See Also: AH=00h"PRINT.COM",AX=0103h