Int 1A Fn E402  U - Disk Spool Ii V4.0x - Spool Existing File???           [c]

   AX = E402h
   ES:BX -> ASCIZ filename (max 32 chars)
   CL = printer port (01h COM1, 02h COM2, 05h LPT1, 06h LPT2)

Return: AH = status
       00h successful
       FFh failed

Note:  this function is also supported by Vertisoft's Emulaser utility ELSPL,
     as that is a licensed version of Disk Spool II

See Also: AH=E1h,AX=E302h,AX=E401h