ocr: UFFFFFN High M em ory Area (HMA) andupper M emory Blocks (UMB Video, ROM, and Adapter m emory space OBFFFFh 640K] Memory availablefor application use FreeM em ory Pointer Interrupt vectors, BOS variable es, DOS - vanat bl es, and 00000h lower memory portion of DOS. DOS Memory Map (no activeapplication)
