Burroughs, Inc.

Unisys Corporation

Burton L Levin

Hanan Potash

Bruce B Roesner

Andrew E Phelps

Melvyn E Genter

Stephen J Chan

Disclosed is a digital computer having memory means stacked on an insulating layer over a semiconductor substrate. In one embodiment, the memory means includes an array of diodes which overflies the substrate and generates control signals for an arithmetic section that lies in the substrate; and in another embodiment, the memory means includes N arrays of diodes which overlie the substrate and operate in parallel to generate signals representing arithmetic transformation of a portion of their address inputs.

Digital computer having control and arithmetic sections stacked above

An apparatus is disclosed that translates virtual memory addresses into physical memory addresses. In particular, this apparatus comprises a plurality of rows of content addressable memory cells, a corresponding plurality of random access memory cells and another corresponding plurality of control circuits. The content addressable memory cells store the virtual memory addresses and the random access memory cells store the physical memory addresses. The control circuits are coupled to both the content addressable and the random access memory cells and are disposed for controlling the operation of the apparatus.

Address translation buffer

A flexible architecture for digital computers can be adapted to meet the many different functional requirements of several computer models. Each model includes an array of sequential logic units. These units include respective control memories for storing commands, means for sequentially fetching and executing selectable sequences of the commands, and soft functional structures for performing customized functions in response to the commands. Included within the soft functional structures are a plurality of selectable electrical contacts which customize the functional response of the structures to the commands. Except for these contacts and the content of the respective control memories, the units are substantially identical. All of the units in the array execute respective command sequences from their control memory to perform a single instruction for the computer model.

Flexible computer architecture using arrays of standardized

Disclosed is a digital computer whose structure is programmable. As a result, the computer's data section, which transforms operands in response to control word sequences, can be readily changed to interpret different types of control words. This is to be distinguished from merely changing the sequence of some fixed set of control words in a control memory. The disclosed programmable structure also enables the computer's control section, which generates the control word sequences, to be readily modified to perform different types of branches as opposed to branches of some rigidly fixed set.

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San Diego, CA, United States of America

Burton L Levin