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Microprogram Link/Return Mechanism

IP.com Disclosure Number: IPCOM000053464D
Original Publication Date: 1980-Jan-01
Included in the Prior Art Database: 2005-Feb-12

Publishing Venue

IBM

Related People

Authors:
Kiselak, JA Nadarzynski, EA Pederson, RJ [+details]

Abstract

A microprogram link occurs when one subroutine, normally addressing a control store by use of a next address field in each micro instruction, calls a second subroutine. When executing a link, the calling subroutine must set up an address for use by the called subroutine. This microcode address will provide the called subroutine with a place to which it can link back, or return, after it has been executed.