Circuit arrangement for selecting the function of connection con

Details Circuit arrangement for selecting the function of connection con Circuit arrangement for selecting the function of connection con

1974-12-20

1977-06-07

Chapnick, Melvin B.

Communications: electrical

Digital comparator systems

G06F 300, G06F 900

Patent

active

040286827

ABSTRACT:
In a circuit arrangement composed of highly integrated chips for a microprogrammed data processing device of the type including an arithmetic and control unit, at least one read-only memory, at least one random access memory, connecting contacts on the chips for connection to peripheral units, and a bus connecting the chips together, each contact is connected to a function selecting unit whose operating state is controlled by a microprogram contained in the read-only memory to selectively connect the contact in the arrangement as either an input contact or an output contact. The function selecting unit includes for each contact a bistable circuit and a gating circuit controlled by the microprogram to determine when each contact constitutes an input or an output terminal.

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"Intel MCS-4 Micro Computer Set," Intel Corp., Jan. 1972, pp. 1-12.
Wickes, William E., "A Compatible MOS/LSI Microprocessor Device Family" in Computer Design, July 1973, pp. 75-81.

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