Int 25  - Pc-cache.sys - Installation Check                                [c]

   AL = FFh
   SI = 4358h

Return: SI = 6378h if installed
       CX = segment of device driver PC-CACHE.SYS
       DX = version (major in DH, minor in DL)
Program: PC-CACHE.SYS is a small device driver used by PC-Cache v5.x to obtain
     access to certain disk drivers for devices such as Bernoulli drives

See Also: INT 13/AH=A0h