Int 21 Fn 4402  U - PC Tools 9 Cprlow.exe - Get Code And Data Addresses    [y]

   AX = 4402h
   BX = file handle referencing device "RECLOWLD"
   DS:DX -> buffer for address list (see below)
   CX ignored

Return: CF clear if successful
       buffer filled
   CF set on error
       AX = error code (01h,05h,06h,0Dh) (see AH=59h)

Format of address list:
Offset Size    Description
 00h   WORD    segment of CPRLOW code
 02h   WORD    offset in code segment of ??? entry point
       (switches into protected mode)
 04h   WORD    offset in code segment of jump array (see below)
 06h   WORD    segment of copy of interrupt vector table at CPRLOW load time

Note:  neither the entry point nor the jump array is valid until after a
     CPR /LOAD, because CPR.EXE installs the code into CPRLOW at runtime.

Format of jump array:
Offset Size    Description
 00h  3 BYTEs  initialize CPRLOW interrupt hooks
 03h  3 BYTEs  reset timers and enable CPR (hotkey enable)
 06h  3 BYTEs  disable CPR (hotkey disable)
 09h  3 BYTEs  clear ??? flag, hotkey disable, and ???
 0Ch  3 BYTEs  initialize delay loop counter (destroys AX,BX,CX,DX)
 0Fh  3 BYTEs  disable CPR completely (commandline /DISABLE)
 12h  3 BYTEs  enable ??? if CPR enabled by both cmdline and hotkey
 15h  3 BYTEs  enable CPR (commandline /ENABLE)