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