Extended memory system and method
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United States of America Patent
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Sep 6, 1983
Grant Date -
N/A
app pub date -
Jul 28, 1980
filing date -
Jul 28, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An extended memory system includes a processor, a plurality of input/output devices, a real memory having first and second portions thereof, the first portion storing a system operation program and the second portion storing a plurality of user programs. The processor produces logical addresses when executing user programs or input/output routines, which logical addresses are translated to real memory addresses by one of two first translation memories. System operation instructions common to all user programs are stored in a low order address portion of the real memory. Different user programs are mapped into mutually exclusive portions of the real memory by means of the two translation memories.
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