Int 2F Fn 1500  U - Cdblitz V2.11 - Flush Cache                            [c]

   AX = 1500h
   CH = 96h (function number)
   BX = 1234h (magic value for CDBLITZ)

Return: CF clear

Note:  this function resets the counts for number of sectors read and number
     of cache hits, but no other values in the statistics record
     (see #2314)

See Also: AX=1500h/CH=90h