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Browse Prior Art Database

Model Byte Change by Means of the Setup Utility Program

IP.com Disclosure Number: IPCOM000106136D
Original Publication Date: 1993-Sep-01
Included in the Prior Art Database: 2005-Mar-20
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Agoglia, RJ: AUTHOR [+4]

Abstract

Disclosed is a modification to the setup utility routine of a computing system which would provide means for the operator to change the model byte of the system.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Model Byte Change by Means of the Setup Utility Program

      Disclosed is a modification to the setup utility routine of a
computing system which would provide means for the operator to change
the model byte of the system.

      The model byte of ROM BIOS is used by various application
programs to vary the way code is executed among different models or
types of systems.  A problem occurs when a particular model byte is
used to identify a system according to the processor it uses, if the
same processor is used in a type of system having an AT bus and
another type of system having the Micro Channel* bus.  In this case,
if the application program assumes the wrong type of bus, the
application may operate incorrectly or hang up the system.

      A modified setup utility routine allows the system user to
select the model byte to be used in his system.  If this feature is
used, the setup utility sets a flag, directing POST to initialize the
model byte selected by the user, during the process of mapping ROM
BIOS to RAM after electrical power to the system is turned on.

*  Trademark of IBM Corp.