Int 2F Fn DF02  - Hyperdisk V4.50+ - Set Cache State                       [c]

   AX = DF02h
   BX = 4448h ('DH')
   DL = new caching flags (see AX=DF01h)

Return: AX = 0000h if supported
       BX = number of cache buffers in use
       CX = number of cache buffers which have been modified
       DL = previous caching flags (see AX=DF01h)
Program: HyperDisk is a shareware disk cache by HyperWare (Roger Cross)

Note:  AH=DFh is the default; if it is already in use by some other program,
     HyperWare programs then scan multiplex numbers from C0h through FFh

See Also: AX=DF00h,AX=DF01h