Browse Prior Art Database

Flexible Memory CARD Address Decoder for Computer System

IP.com Disclosure Number: IPCOM000038660D
Original Publication Date: 1987-Feb-01
Included in the Prior Art Database: 2005-Jan-31

Publishing Venue

IBM

Related People

Authors:
Fuoco, D Hawkey, J Sotolongo, H [+details]

Abstract

A technique is described whereby memory circuit cards of varying capacities and types may be used in computer systems through the use of a flexible address decoder. The decoder provides flexibility to enable the intermixing of memory circuit cards of varying capacities without any deterioration in performance. The concept, described herein, enables computer processors to have the ability to intermix memory circuit cards of 1-megabyte, 2-megabyte and 4-megabyte capacities. In the prior art, all of the memory cards had to be of the same capacity and type. The address decoder, as shown in the block diagram, uses a set of instructions through the use of an identifier (ID) to permit access to each memory card and to ascertain the capacity of the memory card.