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Patent EP0448497A2 successfully refreshed from Google Patents.
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EP0448497A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Power on computer initialization

Assignee: International Business Machines Corp
•
Filing: 1991-02-21
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Granted: —
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Expires: 2011-02-21
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Abstract

Abstract A computer system with read-only memory and permanent read/write memory provides the user with the capability of loading an alternate operating system at the conclusion of a session without turning the computer off and then on. A customization word with a system request (SR) bit is located in read/write memory and is set by routines located in ROM upon user request. A reinitialization is then forced which resets the SR bit and brings up the machine in the alternate operating system located in external memory on a diskette or fixed disk. A flexible initialization system is also disclosed providing customized initialization in a variety of operating systems and applications. The preferred customized initialization is maintained for future system start-ups due to the resetting of the SR bit. <IMAGE>

Inventors

  • 👤 Randal Lee Bertram
  • 👤 Dwayne Thomas Crump
  • 👤 Jeffrey Vernon Ford
  • 👤 Glenn Eugene Welman
  • 👤 John Paul Wright

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-31 13:59
CPC Classifications
G; G06; G06F; G06F9/00; G06F9/06; G06F9/44; G06F9/4401; G06F9/4406; G06F9/441

Claims Analysis

Total Claims: 1
Claim 1
Independent Claim 196 words
A computer system with the capability of automatically initializing itself in an operating system of choice, comprising: a data processor; random access memory (RAM), read only memory (ROM) and permanent read/write memory, all connected to said data processor; system drive means connected to said processor for holding external memory means such as flexible diskettes and/or fixed disks; input and output means connected to said processor; customization word means located in said permanent read/write memory for directing the initialization of said computer system in the operating system of choice when power is turned on, means for enabling the user to alter said customization word means, including alternate system request indicia, routines located in ROM to check said indicia, and if present, to set an alternate system request (SR) bit in said customization word and force a system reset, and, initialization routines located in ROM and operable upon system reset for checking said SR bit, resetting said SR bit, and loading an alternate system from said system drive means, whereby said computer system is restarted in an alternate operating system without turning said computer off and then on and without changing the manner of initialization on future start-ups.

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