Int 31 Fn 0800  P - Dpmi 0.9+ - Physical Address Mapping                   [E]

   AX = 0800h
   BX:CX = physical address (should be above 1 MB)
   SI:DI = size in bytes

Return: CF clear if successful
       BX:CX = linear address which maps the requested physical memory
   CF set on error
       AX = error code (DPMI 1.0+) (8003h,8021h) (see #2814)

Notes: implementations may refuse this call because it can circumvent protects
   the caller must build an appropriate selector for the memory
   do not use for memory mapped in the first megabyte

See Also: AX=0002h,AX=0508h,AX=0509h,AX=0801h,INT 21/AX=250Ah,INT 21/AX=EB05h