Single-chip programmable controller

Details Single-chip programmable controller Single-chip programmable controller

1984-12-21

1988-06-28

Harkcom, Gary V.

Boots, shoes, and leggings

G06F 0922

Patent

active

047543930

ABSTRACT:
A single-chip microprogrammable sequence controller includes a subroutine stack and conditional branching facilities. The controller performs a test and mask operation followed by comparison with a user-defined constant to effect a Boolean sum-of-product function. Address control logic includes a flag signal set by compare logic; the flag is available to a microinstruction decoder where it can be used during a subsequent conditional branch operation based on the setting of the flag.

REFERENCES:
patent: 4003033 (1977-01-01), O'Keefe et al.
patent: 4307445 (1981-12-01), Tredennick et al.
patent: 4330823 (1982-05-01), Retter
patent: 4347566 (1982-08-01), Koda et al.
patent: 4415969 (1983-11-01), Bayliss et al.
patent: 4434465 (1984-02-01), McDonough et al.
patent: 4467444 (1984-08-01), Harmon, Jr. et al.
Microprogramming: A Tutorial and Survey of Recent Developments, IEEE, 1980, 18 pages.

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