Browse Prior Art Database

Enhanced Processor Error Detection Using Address Parity

IP.com Disclosure Number: IPCOM000035892D
Original Publication Date: 1989-Aug-01
Included in the Prior Art Database: 2005-Jan-28

Publishing Venue

IBM

Related People

Authors:
Hilker, SA Petz, BR Tawil, MH Rubish, JR [+details]

Abstract

Most processors having external control-store arrays for microcode are susceptible to undetected hardware errors on the array address lines. Without proper detection, a stuck fault or intermittent fault on the array address could result in the improper control word data being fetched. The address lines most susceptible to intermittent or stuck faults are ones that go to one or more off-chip arrays.