General purpose computer or logic chip and system

Details General purpose computer or logic chip and system General purpose computer or logic chip and system

1975-08-06

1976-10-26

Zache, Raulfe B.

Communications: electrical

Digital comparator systems

G06F 100

Patent

active

039887170

ABSTRACT:
A general purpose logic chip may be replicated for use to construct both the arithmetic unit and the control sections of a computer or other digital data processing or logic circuitry. The chip includes a number of features which when taken together permits its use for a wide variety of data processing functions, including as noted above, the basic arithmetic logic unit and associated functions in addition to micro-operational code control functions. The chip includes a 4-bit arithmetic unit and four registers associated with the arithmetic unit for handling inputs or outputs to and from the arithmetic logic unit. Mode code terminals are provided to implement micro-program control logic circuitry permitting several of the chips to operate on "bytes" or sets of bits of long digital numbers in parallel, without additional circuitry. A random access memory having 16 words, 4 bits each, is provided with alternative addressing circuits to be conveniently accessed either as a "first-in, last-out stack" or as a random access memory register file, or both. Required timing and control are developed within the chip and associated memories to minimize the need for special or additional control circuitry. Additional flexibility is provided for multiple multiplexing circuitry and circuit implementation permitting direct connection of leads from several of the chip outputs. A number of chips of this single type of chip are employed in the implementation of a large class of computer and other data processing systems, employing input/output functions, memory process functions, as well as arithmetic and central processing unit functions.

REFERENCES:
patent: 3462742 (1969-08-01), Miller et al.
patent: 3579201 (1971-05-01), Langley
patent: 3757306 (1973-09-01), Boone
patent: 3757308 (1973-09-01), Fosdick
patent: 3821715 (1974-06-01), Hoff et al.
patent: 3878514 (1975-04-01), Faber
patent: 3879713 (1975-04-01), Bettin et al.
patent: 3892957 (1975-07-01), Bryant

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