Int 13 Fn 2F  - Quickcache Ii V4.20 - Force Immediate Incremental Flush    [c]

   AH = 2Fh

Return: AX = status (0000h successful)
Desc:  immediately flush up to "flushcount" dirty sectors to disk as if the
     flush interval had expired

See Also: AH=21h"QUICKCACHE"