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- Upper_memory_area abstract "In DOS memory management, the upper memory area (UMA) refers to memory between the addresses of 640 KB and 1024 KB (0xA0000–0xFFFFF) in an IBM PC or compatible. IBM reserved the uppermost 384 KB of the 8088 CPU's 1024 KB address space for ROM, RAM on peripherals, and memory-mapped input/output. For example, the monochrome video memory area runs from 704 to 736 KB (0xB0000–B7FFF).However, even with video RAM, the ROM BIOS and I/O ports for expansion cards, much of this 384 KB of address space was unused. As the 640 KB memory restriction became ever more of an obstacle, techniques were found to fill the empty areas with RAM. These areas were referred to as upper memory blocks (UMBs).".
- Upper_memory_area thumbnail IBM_PC_Memory_areas.svg?width=300.
- Upper_memory_area wikiPageExternalLink pc869kb.txt.
- Upper_memory_area wikiPageExternalLink umbpci_e.html.
- Upper_memory_area wikiPageID "1969794".
- Upper_memory_area wikiPageRevisionID "580099231".
- Upper_memory_area hasPhotoCollection Upper_memory_area.
- Upper_memory_area subject Category:DOS_memory_management.
- Upper_memory_area comment "In DOS memory management, the upper memory area (UMA) refers to memory between the addresses of 640 KB and 1024 KB (0xA0000–0xFFFFF) in an IBM PC or compatible. IBM reserved the uppermost 384 KB of the 8088 CPU's 1024 KB address space for ROM, RAM on peripherals, and memory-mapped input/output.".
- Upper_memory_area label "Pamięć górna".
- Upper_memory_area label "Upper Memory Area".
- Upper_memory_area label "Upper Memory Area".
- Upper_memory_area label "Upper Memory Area".
- Upper_memory_area label "Upper Memory Block".
- Upper_memory_area label "Upper memory area".
- Upper_memory_area label "Área de memoria superior".
- Upper_memory_area sameAs Upper_Memory_Block.
- Upper_memory_area sameAs Área_de_memoria_superior.
- Upper_memory_area sameAs Upper_Memory_Area.
- Upper_memory_area sameAs Upper_Memory_Area.
- Upper_memory_area sameAs 상위_메모리_영역.
- Upper_memory_area sameAs Pamięć_górna.
- Upper_memory_area sameAs m.069wkc.
- Upper_memory_area sameAs Q1323962.
- Upper_memory_area sameAs Q1323962.
- Upper_memory_area wasDerivedFrom Upper_memory_area?oldid=580099231.
- Upper_memory_area depiction IBM_PC_Memory_areas.svg.
- Upper_memory_area isPrimaryTopicOf Upper_memory_area.
