Browse Prior Art Database

Method to Shorten Start-up Time Of Personnel Computers

IP.com Disclosure Number: IPCOM000014048D
Original Publication Date: 1999-Nov-01
Included in the Prior Art Database: 2003-Jun-19
Document File: 1 page(s) / 39K

Publishing Venue

IBM

Abstract

Disclosed herein is a method for improving the start up time of a personal computer.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 61% of the total text.

Page 1 of 1

Method to Shorten Start-up Time Of Personnel Computers

Disclosed herein is a method for improving the start up time of a personal computer.

In current practice, when a personal computer starts operation, it is necessary for the ROM based BIOS program to ascertain what hardware resources are fitted to the system. These can include such items as hard disk, optional feature
cards, and memory modules.

In the case of memory modules, it is common in current designs to verify their presence and characteristics by reading the contents of a EEPROM that is present on each memory module. (This is commonly referred to as the "SPD" information.

The definition of this data is controlled by a standard from the JDEC industry standards group.).

The interface to this module is by way of a simple 2 wire interface commonly referred to in the industry as the "SM Bus" or the "I2C" interface.

Although simple and inexpensive to implement, this interface has the shortcoming of being slow (100 kHz clock speed). This can lead to a significant amount of time being spent gathering the SPD data for each memory module. (This is especially noticeable if the system is fitted with a large number of modules, as is common in server application.)

This method takes note of the fact that for a particular system, after the system is manufactured, this memory configuration data remains essentially static except in the rarely occurring cases of defective parts replacement or upgrades to larger memory conf...