Int 31 Fn 0703  P - DPMI 0.9+ - Discard Page Contents                      [E]

   AX = 0703h
   BX:CX = starting linear address
   SI:DI = number of bytes to mark as discarded

Return: CF clear if successful
   CF set on error
       AX = error code (DPMI 1.0+) (8025h) (see AX=0000h)

Notes: this function is advisory, and may be ignored by DPMI implementations
   partial pages will not be discarded

See Also: AX=0701h,AX=0702h