Browse Prior Art Database

Processing System

IP.com Disclosure Number: IPCOM000092207D
Original Publication Date: 1968-Oct-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Fletcher, RP: AUTHOR

Abstract

This processing system continues operation in spite of component failures. The system has a series of execution units EX1...EMn providing ready signals R1...Mn indicating the respective units are operational. These units are specialized. For example, there is one for an add instruction, one for a multiply instruction, etc. There can be a separate unit for each different OP code. The units are so arranged that, for each unit performing a particular function, there is at least one other unit capable of performing that function on an equal or degraded basis under the control of a microcode, microcode or hardware. The system also passes the individual OP codes of an instruction stream through control unit C. The ready signals R1...Mn are also fed to unit C.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Processing System

This processing system continues operation in spite of component failures. The system has a series of execution units EX1...EMn providing ready signals R1...Mn indicating the respective units are operational. These units are specialized. For example, there is one for an add instruction, one for a multiply instruction, etc. There can be a separate unit for each different OP code. The units are so arranged that, for each unit performing a particular function, there is at least one other unit capable of performing that function on an equal or degraded basis under the control of a microcode, microcode or hardware. The system also passes the individual OP codes of an instruction stream through control unit C. The ready signals R1...Mn are also fed to unit C. In response to such signals, and to an OP code, unit C selects the particular unit whose primary function is to execute the particular OP code. However, if such execution unit fails, and hence there is no ready signal from it, unit C then treats the respective OP code as a branch instruction. Such action causes unit C to select or branch to the second execution unit capable of performing the particular instruction.

1

Page 2 of 2

2

[This page contains 2 pictures or other non-text objects]