Int 31 Fn 050A  P - DPMI 1.0+ - Get Memory Block Size And Base             [E]

   AX = 050AH
   SI:DI = memory block handle

Return: CF clear if successful
       SI:DI = size in bytes
       BX:CX = base address
   CF set on error
       AX = error code (8023h) (see AX=0000h)

See Also: AX=0501h,AX=0504h