CA2020521A1 - Apparatus and method for decreasing the memory requirements for bios in a personal computer system - Google Patents

Apparatus and method for decreasing the memory requirements for bios in a personal computer system

Info

Publication number
CA2020521A1
CA2020521A1 CA2020521A CA2020521A CA2020521A1 CA 2020521 A1 CA2020521 A1 CA 2020521A1 CA 2020521 A CA2020521 A CA 2020521A CA 2020521 A CA2020521 A CA 2020521A CA 2020521 A1 CA2020521 A1 CA 2020521A1
Authority
CA
Canada
Prior art keywords
bios
boot record
memory
master boot
personal computer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2020521A
Other languages
French (fr)
Other versions
CA2020521C (en
Inventor
Richard Bealkowski
John Wiley Blackledge Jr.
Doyle Stanfill Cronk
Richard Alan Dayan
Scott Gerard Kinnear
George D. Kovach
Matthew Stephen Palka Jr.
Robert Sachsenmaier
Kevin Marshall Zyvoloski
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
Richard Bealkowski
John Wiley Blackledge Jr.
Doyle Stanfill Cronk
Richard Alan Dayan
Scott Gerard Kinnear
George D. Kovach
Matthew Stephen Palka Jr.
Robert Sachsenmaier
Kevin Marshall Zyvoloski
International Business Machines Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Richard Bealkowski, John Wiley Blackledge Jr., Doyle Stanfill Cronk, Richard Alan Dayan, Scott Gerard Kinnear, George D. Kovach, Matthew Stephen Palka Jr., Robert Sachsenmaier, Kevin Marshall Zyvoloski, International Business Machines Corporation filed Critical Richard Bealkowski
Publication of CA2020521A1 publication Critical patent/CA2020521A1/en
Application granted granted Critical
Publication of CA2020521C publication Critical patent/CA2020521C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/10—Program control for peripheral devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/44—Arrangements for executing specific programs
    • G06F9/4401—Bootstrapping
    • G06F9/4406—Loading of operating system

Abstract

ABSTRACT

An apparatus and method for decreasing the memory requirements of BIOS in a personal computer system includes storing a first portion of BIOS in memory and a second portion on a direct storage access device. The personal computer system comprises a system processor, a random access main memory, a read only memory, and at least one direct access storage device. The read only memory includes the first portion of BIOS and data representing the type of system processor and system planar I/O configuration. The first portion of BIOS only includes routines for initializing the system and the direct access storage device to read in a master boot record into the system from the direct access storage device. The master boot record includes a data segment and an executable code segment. The data segment includes data representing system hardware and a system configuration which is supported by the master boot record. The first BIOS portion confirms the master boot record is compatible with the system hardware by verifying that the data from the data segment of the master boot record agrees with the system processor, system planar, and planar I/O configuration. If the master boot record is compatible with the system hardware, the first BIOS portion vectors the system processor to execute the executable code segment of the master boot record. The executable code segment confirms that the system configuration has not changed and loads in the remaining BIOS portion from the direct access storage device into random access memory superseding the first BIOS portion. The executable code segment then verifies the authenticity of the remaining BIOS portion and vectors the system processor to begin executing the remaining BIOS now in random access memory. The remaining BIOS in main memory includes reusable routines for operating the personal computer system in a normal manner.
CA002020521A 1989-08-25 1990-07-05 Apparatus and method for decreasing the memory requirements for bios in a personal computer system Expired - Fee Related CA2020521C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/398,860 US5136713A (en) 1989-08-25 1989-08-25 Apparatus and method for decreasing the memory requirements for bios in a personal computer system
US398,860 1989-08-25

Publications (2)

Publication Number Publication Date
CA2020521A1 true CA2020521A1 (en) 1991-02-26
CA2020521C CA2020521C (en) 1993-11-09

Family

ID=23577082

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002020521A Expired - Fee Related CA2020521C (en) 1989-08-25 1990-07-05 Apparatus and method for decreasing the memory requirements for bios in a personal computer system

Country Status (15)

Country Link
US (1) US5136713A (en)
EP (1) EP0417888B1 (en)
JP (1) JPH0756631B2 (en)
KR (1) KR920008445B1 (en)
CN (1) CN1017839B (en)
AT (1) ATE138747T1 (en)
AU (1) AU635550B2 (en)
CA (1) CA2020521C (en)
DE (1) DE69027164T2 (en)
GB (1) GB9012946D0 (en)
HK (1) HK203296A (en)
IL (1) IL95228A0 (en)
MY (1) MY106707A (en)
NZ (1) NZ234711A (en)
SG (1) SG44435A1 (en)

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Also Published As

Publication number Publication date
ATE138747T1 (en) 1996-06-15
CA2020521C (en) 1993-11-09
HK203296A (en) 1996-11-15
AU635550B2 (en) 1993-03-25
KR910005169A (en) 1991-03-30
KR920008445B1 (en) 1992-09-29
JPH0756631B2 (en) 1995-06-14
IL95228A0 (en) 1991-06-10
CN1049731A (en) 1991-03-06
AU5999290A (en) 1991-02-28
SG44435A1 (en) 1997-12-19
NZ234711A (en) 1993-04-28
CN1017839B (en) 1992-08-12
US5136713A (en) 1992-08-04
EP0417888B1 (en) 1996-05-29
EP0417888A2 (en) 1991-03-20
EP0417888A3 (en) 1992-01-29
DE69027164D1 (en) 1996-07-04
MY106707A (en) 1995-07-31
GB9012946D0 (en) 1990-08-01
JPH0391839A (en) 1991-04-17
DE69027164T2 (en) 1996-12-12

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Legal Events

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