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Lookup NU author(s): Professor Pete Lee, Keith Heron
Backward error recovery is an integral part of the recovery block scheme that has been advanced as a method for providing tolerance against faults in software; the recovery cache has been proposed as a mechanism for providing this error recovery capability. This paper describes a recover cache that is being built for the PDP-11 family of machines. This recovery cache has been designed to be an ""add-on"" unit which requires no hardware alterations to the host CPU but which intersects the bus between the CPU and the memory modules. Specially designed hardware enables concurrent operation of the recovery cache and the host system, and aims to minimise the overheads imposed on the host. The paper describes the design of the recovery cache and the new instructions which have (conceptually) been added to the host CPU, and provides an overview of the software necessary to control the device.
Author(s): Lee PA, Ghani N, Heron K
Publication type: Report
Publication status: Published
Series Title: Computing Laboratory Technical Report Series
Year: 1979
Pages: 10
Print publication date: 01/03/1979
Source Publication Date: March 1979
Report Number: 134
Institution: Computing Laboratory, University of Newcastle upon Tyne
Place Published: Newcastle upon Tyne
URL: .A Recovery Cache for the PDP-11
