Browse Prior Art Database

Automatic Configuration of Memory Options With Fault Bypassing

IP.com Disclosure Number: IPCOM000057680D
Original Publication Date: 1988-Jun-01
Included in the Prior Art Database: 2005-Feb-15

Publishing Venue

IBM

Related People

Authors:
Zolty, HB [+details]

Abstract

A method for auto-configuration of a memory-expansion option board in a computer is described. An option board 10 constitutes a modification of the memory expansion board used in an IBM PC-AT computer. Board 10 comprises an Electronically Programmable Logic Device (EPLD) 1, a Basic Input/Output System (BIOS) extension Read-Only Memory (ROM) 2, a plurality of Random-Access Memories (RAMs), e.g., 3-7. The factory-configured initial address for the BIOS extension is set to the top of the ROM extension area and any RAM on board 10 will be at the high RAM location of the system map. Board 10 is connected to computer bus 8, which, together with system configuration table 9, are connected to CPU 11. When the computer is powered on, it will branch to the BIOS extension after the Power On System Test (POST) is computed.