Browse Prior Art Database

Ctrl-Alt-Ins Key Sequence to Invoke the System Partition

IP.com Disclosure Number: IPCOM000101690D
Original Publication Date: 1990-Aug-01
Included in the Prior Art Database: 2005-Mar-16
Document File: 2 page(s) / 68K

Publishing Venue

IBM

Related People

Arnold, LR: AUTHOR [+2]

Abstract

The article describes a technique to enable a specific sequence of actions to initiate invocation of a computer system partition code.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Ctrl-Alt-Ins Key Sequence to Invoke the System Partition

       The article describes a technique to enable a specific
sequence of actions to initiate invocation of a computer system
partition code.

      There is a protected system partition on the hardfile for
certain computer systems.  A user-initiated key sequence can invoke
the partition.  Because several existing operating systems function
on the system, it is not feasible to place a requirement to support a
new key sequence on existing software.  Therefore, a key sequence
which has no impact on existing software, but permits the user to
boot the system partition is required.

      In a computer system which supports a system partition that
contains the contents of the reference diskette, this partition is
normally hidden.  The system partition is accessed through BIOS.
When the hidden partition is activated, power-on self-test (POST)
automatically invokes the system partition on a cold start when an
error is detected.  To increase the flexibility of the system
partition, it is necessary to provide a method for the end user to
access the partition when desired.  This is accomplished by defining
and providing support for a key sequence that does not impact any
existing operating systems and instructs POST to boot the system
partition.

      The new key sequence to invoke the system partition must not
affect existing software.  Most, if not all, operating systems
intercept part or all of the keystrokes from the keyboard.  Because
of this situation, BIOS cannot provide the support under the
operating system for the new key sequence.  For example, if B...