Boots – shoes – and leggings
Patent
1987-09-17
1988-05-17
Shaw, Gareth D.
Boots, shoes, and leggings
G06F 900
Patent
active
047455748
ABSTRACT:
In a microcoded data processor, an instruction is provided which enables the microaddress for the micromachine to be externally specified. By way of this instruction, the processor may be directed to execute special microcoded routines otherwise unavailable during normal execution. These special microcoded routines may perform useful functions such as testing in an expeditious manner portions of the circuitry of the processor which would otherwise be difficult to test. For example, the functionality of regular structures such as instruction decoding and control programmable logic arrays (PLA's) may either be gated directly out to the tester or internally analyzed before the accumulated results are presented to the tester. On-board instruction caches may also be efficiently exercised to verify that the tag portion properly determines "hits" and "misses", and that the actual instruction cache portion functions accurately.
REFERENCES:
patent: 4392198 (1983-07-01), Shimazaki
patent: 4461000 (1984-07-01), Young
patent: 4482953 (1984-11-01), Burke
patent: 4488228 (1984-12-01), Crudele et al.
patent: 4493035 (1985-01-01), MacGregor et al.
patent: 4509114 (1982-02-01), Leininger et al.
patent: 4524415 (1985-06-01), Mills, Jr. et al.
Aaron Robert W.
Kuban John
MacGregor Douglas B.
Thompson Robert R.
Fisher John A.
Mills, III John G.
Motorola Inc.
Myers Jeffrey Van
Shaw Gareth D.
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