Calculator data storage system

Details Calculator data storage system Calculator data storage system

1975-07-07

1977-01-18

Springborn, Harvey E.

Communications: electrical

Digital comparator systems

G06F 1300

Patent

active

040042804

ABSTRACT:
Disclosed is an expandable calculator system of the type implemented on semiconductor chips providing additional data storage registers for increasing data storage capacity of the basic system. A basic calculator system comprising two semiconductor chips is provided with additional semiconductor chips each providing a plurality of separately addressable registers for storing data, to thereby increase the data storage capacity of the two-chip system. First and second control signals synchronize the internal timing of the external register chips and also enable communication to the external chips. The data system has 10 registers on each of the additional semiconductor chips which are addressed by means responsive to instructions communicated via the data transmission path.

REFERENCES:
patent: 3702988 (1972-11-01), Haney
patent: 3757306 (1973-09-01), Boone
patent: 3798606 (1974-03-01), Henle
patent: 3818459 (1974-06-01), Vrablik
patent: 3821715 (1974-06-01), Hoff, Jr.

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