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    DECREASING THE MEMORY REQUIREMENTS FOR BIOS IN A PERSONAL COMPUTER SYSTEM
    1.
    发明专利
    DECREASING THE MEMORY REQUIREMENTS FOR BIOS IN A PERSONAL COMPUTER SYSTEM 未知

    公开(公告)号：NZ234711A

    公开(公告)日：1993-04-28

    申请号：NZ23471190

    申请日：1990-07-30

    Applicant: IBM

    Inventor： BEALKOWSKI RICHARD ,  BLACKLEDGE JOHN WILEY ,  CRONK DOYLE STANFILL ,  DAYAN RICHARD ALAN ,  KINNEAR SCOTT GERARD ,  KOVACH GEORGE D ,  PALKA MATTHEW STEPHEN ,  SACHSENMAIER ROBERT ,  ZYVOLOSKI KEVIN MARSHALL

    IPC: G06F9/445 ,  G06F13/10

    Abstract: An apparatus and method for decreasing the memory requirements of BIOS in a personal computer system (10) includes storing a first portion of BIOS in memory and a second portion on a direct storage access device. The personal computer system (10) comprises a system processor (26), a random access main memory, a read only memory (36), and at least one direct access storage device (62,66). The read only memory (36) includes the first portion of BIOS and data representing the type of system processor (26) and system planar (24) I/O configuration. The first portion of BIOS only includes routines for initializing the system (10) and the direct access storage device (62,66) to read in a master boot record into the system (10) from the direct access storage device (62,66). The master boot record includes a data segment (122-138) and an executable code segment (120). The data segment (122-138) 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 (122-138) of the master boot record agrees with the system processor (26), system planar (24), and planar (24) I/O configuration. If the master boot record is compatible with the system hardware, the first BIOS portion vectors the system processor (26) to execute the executable code segment (120) of the master boot record. The executable code segment (120) confirms that the system conf iguration has not changed and loads in the remaining BIOS portion from the direct access storage device (62,66) into random access memory (32) superseding the first BIOS portion. The executable code segment (120) then verifies the authenticity of the remaining BIOS portion and vectors the system processor (26) to begin executing the remaining BIOS now in random access memory (32). The remaining BIOS in main memory includes reusable routines for operating the system (10) in a normal manner.

    5.
    发明专利
    未知

    公开(公告)号：DE69027167D1

    公开(公告)日：1996-07-04

    申请号：DE69027167

    申请日：1990-07-04

    Applicant: IBM

    Inventor： BEALKOWSKI RICHARD ,  BLACKLEDGE JOHN WILEY ,  CRONK DOYLE STANFILL ,  DAYAN RICHARD ALAN ,  KINNEAR SCOTT GERALD ,  KOVACH GEORGE D ,  PALKA MATTHEW STEPHEN

    IPC: G06F13/10 ,  G06F9/445

    Abstract: An apparatus and method for loading BIOS from a diskette drive (66) into a personal computer system (10) normally connected to a fixed disk drive (62). The personal computer system (10) further includes a system processor (26), a random access main memory, a read only memory (36) and a switching means. The switching means generates a signal to indicate a mode for whether BIOS loads from either diskette or disk. In a priority mode, BIOS loads immediately from diskette. In a recovery mode, BIOS loads from diskette after testing the disk subsystem. The read only memory (36) includes a first portion of BIOS and data representing the type of system processor (26) and system planar (24) I/O configuration. The first portion of BIOS initializes the system (10) and queries the switching means. If the fixed disk is not available or the master boot record on the disk is invalid, the first portion of BIOS reads in a master boot record from the diskette drive (66). For either mode, the master boot record includes a data segment (122-138) and an executable code segment (120). The data segment (122-138) includes data representing system hardware and a system configuration which is supported by the master boot record. The first BIOS portion transfers control to the executable code segment (120) which confirms the master boot record is compatible with the system hardware by verifying that the data from the data segment (122-138) of the master boot record agrees with the system processor (26), system planar (24), and planar I/O configuration. If the master boot record is compatible with the system hardware, the executable code segment (120) confirms that the system configuration has not changed and loads in the remaining BIOS portion from the diskette drive (66) into random access memory (32). The executable code segment (120) then verifies the authenticity of the remaining BIOS portion and vectors the system processor (26) to begin executing the BIOS now in random access memory (32). BIOS, executing in random access memory (32), then boots up the operating system to begin operation of the personal computer system (10).

    INITIAL BIOS LOAD FOR PERSONAL COMPUTER SYSTEM
    7.
    发明专利
    INITIAL BIOS LOAD FOR PERSONAL COMPUTER SYSTEM 未知

    公开(公告)号：NZ234710A

    公开(公告)日：1993-04-28

    申请号：NZ23471090

    申请日：1990-07-30

    Applicant: IBM

    Inventor： BEALKOWSKI RICHARD ,  BLACKLEDGE JOHN WILEY ,  CRONK DOYLE STANFILL ,  DAYAN RICHARD ALAN ,  KINNEAR SCOTT GERARD ,  KOVACH GEORGE D ,  PALKA MATTHEW STEPHEN ,  SACHSENMAIER ROBERT ,  ZYVOLOSKI KEVIN MARSHALL

    IPC: G06F9/06 ,  G06F9/445

    Abstract: An apparatus and method for loading BIOS stored on a direct access storage device (62,66) into a personal computer system (10). The personal computer system (10) comprises a system processor (26), a system planar (24), a random access main memory, a read only memory (36), and at least one direct access storage device (62,66). The read only memory (36) includes a first portion of BIOS and data representing the type of system processor (26) and system planar (24) I/O configuration. The first portion of BIOS initializes the system (10) and the direct access storage device (62,66) to read in a master boot record into the system (10) from the direct access storage device (62,66). The master boot record includes a data segment (122-138) and an executable code segment (120). The data segment (122-138) includes data representing system hardware and a system (10) 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 (122-138) of the master boot record agrees with the system processor (26), system planar (24), and planar I/O configuration. If the master boot record is compatible with the system hardware, the first BIOS portion vectors the system processor (26) to execute the executable code segment (120) of the master boot record. The executable code segment (120) confirms that the system configuration has not changed and loads in the remaining BIOS portion from the direct access storage device (62,66) into random access memory (32). The executable code segment (120) then verifies the authenticity of the remaining BIOS portion and vectors the system processor (26) to begin executing the BIOS now in random access memory (32). BIOS executing in random access memory (32) then boots up the operating system to begin operation of the personal computer system (10).

    9.
    发明专利
    未知

    公开(公告)号：DE69027167T2

    公开(公告)日：1996-12-12

    申请号：DE69027167

    申请日：1990-07-04

    Applicant: IBM

    Inventor： BEALKOWSKI RICHARD ,  BLACKLEDGE JOHN WILEY ,  CRONK DOYLE STANFILL ,  DAYAN RICHARD ALAN ,  KINNEAR SCOTT GERALD ,  KOVACH GEORGE D ,  PALKA MATTHEW STEPHEN

    IPC: G06F13/10 ,  G06F9/445

    Abstract: An apparatus and method for loading BIOS from a diskette drive (66) into a personal computer system (10) normally connected to a fixed disk drive (62). The personal computer system (10) further includes a system processor (26), a random access main memory, a read only memory (36) and a switching means. The switching means generates a signal to indicate a mode for whether BIOS loads from either diskette or disk. In a priority mode, BIOS loads immediately from diskette. In a recovery mode, BIOS loads from diskette after testing the disk subsystem. The read only memory (36) includes a first portion of BIOS and data representing the type of system processor (26) and system planar (24) I/O configuration. The first portion of BIOS initializes the system (10) and queries the switching means. If the fixed disk is not available or the master boot record on the disk is invalid, the first portion of BIOS reads in a master boot record from the diskette drive (66). For either mode, the master boot record includes a data segment (122-138) and an executable code segment (120). The data segment (122-138) includes data representing system hardware and a system configuration which is supported by the master boot record. The first BIOS portion transfers control to the executable code segment (120) which confirms the master boot record is compatible with the system hardware by verifying that the data from the data segment (122-138) of the master boot record agrees with the system processor (26), system planar (24), and planar I/O configuration. If the master boot record is compatible with the system hardware, the executable code segment (120) confirms that the system configuration has not changed and loads in the remaining BIOS portion from the diskette drive (66) into random access memory (32). The executable code segment (120) then verifies the authenticity of the remaining BIOS portion and vectors the system processor (26) to begin executing the BIOS now in random access memory (32). BIOS, executing in random access memory (32), then boots up the operating system to begin operation of the personal computer system (10).

    BIOS PROTECTION IN A PERSONAL COMPUTER SYSTEM
    10.
    发明专利
    BIOS PROTECTION IN A PERSONAL COMPUTER SYSTEM 未知

    公开(公告)号：NZ234712A

    公开(公告)日：1993-04-28

    申请号：NZ23471290

    申请日：1990-07-30

    Applicant: IBM

    Inventor： BEALKOWSKI RICHARD ,  BLACKLEDGE JOHN WILEY ,  CRONK DOYLE STANFILL ,  DAYAN RICHARD ALAN ,  KINNEAR SCOTT GERARD ,  KOVACH GEORGE D ,  PALKA MATTHEW STEPHEN ,  SACHSENMAIER ROBERT ,  ZYVOLOSKI KEVIN MARSHALL ,  DIXON JERRY DUANE ,  MCNEILL ANDREW BOYCE ,  WACHTEL EDWARD IRVING

    IPC: G06F9/445 ,  G06F12/14 ,  G06F13/10 ,  G06F21/22

    Abstract: An apparatus and method for protecting BIOS stored on a direct access storage device (62) into a personal computer system (10). The personal computer system (JO) comprises a system processor (26), a system planar (24), a random access main memory (32), a read only memory (36), a protection means and at least one direct access storage device (62). The read only memory (36) includes a first portion of BIOS and data representing the type of system processor (26) and system planar (24) I/O configuration. The first portion of BIOS initializes the system (10) and the direct access storage device (62), and resets the protection means in order to read in a master boot record into the random access memory (32) from a protectable partition on the direct access storage device (62). 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 (26), system planar (24), and planar (24) I/O configuration. If the master boot record is compatible with the system hardware, the first BIOS portion vectors the system processor (26) 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 same protectable partition on the direct access storage device (62) into random access memory (32). The executable code segment then verifies the authenticity of the remaining BIOS portion and vectors the system processor (26) to begin executing the BIOS now in random access memory. BIOS, executing in random access memory (32), then activates the protection means to prevent further access to the protectable partition. BIOS boots up the operating system to begin operation of the personal computer system.

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