Communications: electrical – Digital comparator systems
Patent
1973-12-10
1976-01-20
Shaw, Gareth D.
Communications: electrical
Digital comparator systems
G06F 1500
Patent
active
039342298
ABSTRACT:
Disclosed is a calculator having a basic pair of semiconductor chips respectively providing memory and computational functions and a third chip in combination therewith providing additional register and memory capacity. The basic chip pair generates system timing signals, flag signals and control signals which address the registers on the third chip and allow data to be written there into via the input/output data lines and data to be read therefrom via the input/output lines. The specific functions are effected upon the occurrence of the flag signal concurrently with a preselected timing signal.
REFERENCES:
patent: 3579201 (1971-05-01), Langley
patent: 3623009 (1971-11-01), Ragen
patent: 3631403 (1971-12-01), Asbo et al.
patent: 3656131 (1972-04-01), Libby et al.
patent: 3691538 (1972-09-01), Haney et al.
patent: 3760171 (1973-09-01), Wang et al.
Cochran Michael J.
Grant, Jr. Charles P.
Connors, Jr. Edward J.
Levine Harold
Sachs Michael C.
Sadacca Stephen S.
Shaw Gareth D.
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