Browse Prior Art Database

External Control Of Microprocessor Branching To A Diagnostic Microprogram

IP.com Disclosure Number: IPCOM000068284D
Original Publication Date: 1979-Dec-01
Included in the Prior Art Database: 2005-Feb-20

Publishing Venue

IBM

Related People

Authors:
Lynch, E [+details]

Abstract

When power is applied to a microprocessor, or when a reset occurs. hardware in the processor forces the instruction counter to a predetermined value, e.g., FFPD. It is usual to provide s branch instruction at this predetermined location to cause the microprocessor to branch to initialization microcode, which may then occupy as much storage as is required without addressing conflict.