Int 31 Fn 0507  P - Dpmi 1.0+ - Modify Page Attributes                     [E]

   AX = 0507h
   ESI = memory block handle
   EBX = offset in memory block of first page
   ECX = number of pages
   ES:EDX -> array of WORDs with new page attributes (see #2827)

Return: CF clear if successful
   CF set on error
       AX = error code (8001h,8002h,8013h,8014h,8021h,8023h,8025h)
       (see #2814)
       ECX = number of pages which have been set

Notes: only supported by 32-bit DPMI hosts, but may be used by 16-bit clients
   if EBX is not page-aligned, it will be rounded down

See Also: AX=0504h,AX=0506h,INT 21/AX=251Eh