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Upper Memory Block

   Also found in: Acronyms, Wikipedia 0.03 sec.

Upper Memory Block

See UMB.

(storage)upper memory block - (UMB) Up to 64 kilobytes of the expanded memory page frame above the first 64 kilobytes. The UMB can be used to store TSR programs or device drivers thereby freeing parts of the precious conventional memory. The UMB is provided by special memory manager programs; many EMMs can provide UMB as well.


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