INT 2F U - PrintCache v3.1 PCACHE.EXE - INSTALLATION CHECK
        AX = C000h
Return: AL = FFh if installed
            SI = signature value 20D6h
            DI = signature value 8761h
            ES:BX -> configuration table (see below)
            CX = ??? (0300h)
            DX = ??? (0020h)
Program: PCACHE is the resident print spooler portion of PrintCache by
          LaserTools; it may use either memory or disk space to spool output
Note:   AH=C0h is the default, and may be set to any value from C0h to FFh
          with a commandline switch
SeeAlso: AX=0100h/SI=20D6h,AX=C001h"PCACHE"

Format of configuration table:
Offset  Size    Description
 00h 26 BYTEs   ASCIZ signature string "TORQ Configuration Table: "
 1Ah  2 BYTEs   ???
 1Ch    DWORD   -> data table (see below)
 20h  4 BYTEs   ASCIZ version string ("3.1" for v3.1)
 24h  5 BYTEs   ???
 29h 12 BYTEs   ASCIZ version date string ("Aug 31 1993" for v3.1)
 35h    WORD    buffered port type (01h = LPT, 02h = COM)
 37h    WORD    buffered port BIOS port number
 39h  5 BYTEs   ASCIZ buffered port name ("LPTn" or "COMn")
 3Eh    WORD    physical port type (01h = LPT, 02h = COM)
 40h    WORD    physical port BIOS port number
 42h  5 BYTEs   ASCIZ physical port name ("LPTn" or "COMn")
 47h    BYTE    port driver IRQ
 48h 21 BYTEs   ???
 5Dh    WORD    buffer size in K
 5Fh 27 BYTEs   ???
 7Ah    BYTE    popup hotkey shift states (see INT 16/AH=02h)
 7Bh    BYTE    popup hotkey scan code (see INT 09h"IRQ1")
 7Ch  4 BYTEs   ???
 80h 20 BYTEs   ASCIZ printer type name
        ???

Format of data table:
Offset  Size    Description
 00h  2 BYTEs   ???
 02h    DWORD   -> ??? entry point
        ???

.