Browse Prior Art Database

Extended Addressing Of Main Storage

IP.com Disclosure Number: IPCOM000067538D
Original Publication Date: 1979-Aug-01
Included in the Prior Art Database: 2005-Feb-20

Publishing Venue

IBM

Related People

Authors:
Moore, BB [+details]

Abstract

In certain contemporary systems, locations in main storage are specified by 24-bit address numbers contained in program information parameters. These numbers have an effective addressing range of up to 2/24/ (=16,777,216) byte address locations (refer to pages 14 and 15 in "IBM System/370 Principles of Operation," form GA22-70000-5). This addressing range could be extended to accommodate main storage capacities in excess of 16,777,216 bytes by directly increasing the number of program information bits used to represent addresses to more than 24. However, this could require complex and time wasteful conversions of existing programs.