Microcomputer executing compressed program and generating compressed branch addresses
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United States of America Patent
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-
May 20, 1997
Issued Date -
N/A
app pub date -
Aug 15, 1995
filing date -
Jun 8, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An executable program is stored in compressed form in a ROM, from which compressed program data is fetched to be expanded by an expandor to a pre-compression form. The expanded data is then decoded by an instruction decoder for execution. This novel setup reduces a memory usage amount in main storage including the ROM. If a branch instruction appears, a controller converts a pre-compression branch destination address to a corresponding post-compression branch destination address and sets a value thereof to a program counter.
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