Int 16 Fn 5758  U - Netroom Cacheclk - Installation Check                  [c]

   AX = 5758h
   BX = 4858h ('HX')
   DX = 4443h ('DC')
   CX <> 5758h

Return: BX = 6878h if installed
   CX = 6463h if installed
       AX = code segment of TSR
       CX = internal version??? (v3.00 returns 0100h)
Program: CACHECLK is a "cloaked" disk cache included with Netroom

Notes: if CX=5758h on entry, CACHECLK returns with all registers unchanged
   the cache statistics are located early in the segment pointed at by
     AX on return