A mode of operation of intel processors, not officially acceppted by intel. It allows access to all 4Gb linear memory space, while in real mode. It works by first enter protected mode, set up a segment table, with one segment for all the memory, read this segment into a segment register (not CS!), and then return to real mode. The descriptor-data from the table is not forgotten, so the register may be used to access all memory.

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