Int 31 Fn 0D01  P - Dpmi 1.0+ - Free Shared Memory                         [E]

   AX = 0D01h
   SI:DI = shared memory block handle

Return: CF clear if successful
   CF set on error
       AX = error code (8023h) (see #2814)

Notes: handle becomes invalid after this call
   DPMI maintains separate global and virtual machine use counts for each
     shared memory block; when the global use counts reaches zero, the
     block is finally destroyed

See Also: AX=0502h,AX=0D00h