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公开(公告)号：AT138748T
公开(公告)日：1996-06-15
申请号：AT90307301
申请日：1990-07-04
Applicant: IBM
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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公开(公告)号：AT138747T
公开(公告)日：1996-06-15
申请号：AT90307297
申请日：1990-07-04
Applicant: IBM
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.
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公开(公告)号：CA2044522C
公开(公告)日：1995-10-17
申请号：CA2044522
申请日：1991-06-13
Applicant: IBM
Inventor： ARNOLD LISA RUOTOLO , BEALKOWSKI RICHARD , BLACKLEDGE JOHN WILEY JR , CRONK DOYLE STANFILL , DAYAN RICHARD ALAN , GEISLER DOUGLAS RICHARD , MITTELSTEDT MATTHEW TODD , PALKA MATTHEW STEPHEN JR , PAUL JOHN DAVID , SACHSENMAIER ROBERT , SMELTZER KENNETH DONALD , WOYTOVECH PETER ANDREW , ZYVOLOSKI KEVIN MARSHALL
Abstract: A personal computer system according to the present invention comprises a system processor, a random access memory, a read only memory, and at least one direct access storage device. A direct access storage device controller coupled between the system processor and direct access storage device includes a protection mechanism for protecting a region of the storage device. The protected region of the storage device includes a master boot record, a BIOS image and a system reference diskette image. The BIOS image includes a section known as Power on Self Test (POST). POST is used to test and initialize a system. Upon detecting any configuration error, system utilities from the system reference diskette image, such as set configuration programs, diagnostic programs and utility programs can be automatically activated from the direct access storage device.
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34.发明专利
公开(公告)号：CA2020520C
公开(公告)日：1995-08-15
申请号：CA2020520
申请日：1990-07-05
Applicant: IBM
Inventor： BEALKOWSKI RICHARD , BLACKLEDGE JOHN WILEY JR , CRONK DOYLE STANFILL , DAYAN RICHARD ALAN , KINNEAR SCOTT GERARD , KOVACH GEORGE D , PALKA MATTHEW STEPHEN JR , SACHSENMAIER ROBERT , ZYVOLOSKI KEVIN MARSHALL , WACHTEL EDWARD IRVING , DIXON JERRY DUANE , MCNEILL ANDREW BOYCE
Abstract: An apparatus and method for protecting BIOS stored on a direct access storage device into a personal computer system. The personal computer system comprises a system processor, a system planar, a random access main memory, a read only memory, a protection means and at least one direct access storage device. The read only memory includes a first portion of BIOS and data representing the type of system processor and system planar I/O configuration. The first portion of BIOS initializes the system and the direct access storage device, and resets the protection means in order to read in a master boot record into the random access memory from a protectable partition on 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 same protectable partition on the direct access storage device into random access memory. The executable code segment then verifies the authenticity of the remaining BIOS portion and vectors the system processor to begin executing the BIOS now in random access memory. BIOS, executing in random access memory, 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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公开(公告)号：DE3786660D1
公开(公告)日：1993-08-26
申请号：DE3786660
申请日：1987-12-15
Applicant: IBM
Inventor： BEALKOWSKI RICHARD , DAYAN RICHARD ALAN , DORIA DAVID JOSEPH , KINNEAR SCOTT GERARD , KRANTZ JEFFREY ISSAC , LIVERMAN ROBERT BRITTON , SOTOMAYOR GUY GIL , WILLIAMS DONALD DORSEY , VAISKAUCKAS GARY ANTHONY
Abstract: A computer system and method for operating a computer system capable of running in mutually incompatible real and protected addressing modes, in which programs written for one mode can be run in the other mode without modification. The BIOS assembles two different common data areas for the two modes, each inclusive of device block pointers, function transfer table pointers, data pointers, and function pointers. The common data area for the real mode is assembled first. To assemble the pointers for the protected mode common data area, the offset values from the real mode area are copied directly, and then selector values are inserted whose physical addresses correspond to the segments of the corresponding pointers in the real mode area. The selector values are derived from a segment descriptor table.
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Patent Agency Ranking
公开(公告)号：DE3582196D1
公开(公告)日：1991-04-25
申请号：DE3582196
申请日：1985-06-19
Applicant: IBM
Inventor： AGOGLIA ROBERT JOHN , DAYAN RICHARD ALAN , SMITH BRUCE ALAN
Abstract: Diskette drive determination in which a read/write head in a diskette drive is instructed to move to a track that is inaccessible on one type of diskette drive. The head is then stepped back toward a track associated with a sensor indicating the positioning of the head over the track. The number of steps required to activate the sensor determines which type of drive is being used.
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公开(公告)号：DE4026911A1
公开(公告)日：1991-02-28
申请号：DE4026911
申请日：1990-08-25
Applicant: IBM
Inventor： BEALKOWSKI RICHARD , BLACKLEDGE JUN JOHN WILEY , CRONK DOYLE STANFILL , DAYAN RICHARD ALAN , KINNEAR SCOTT GERARD , KOVACH GEORGE D , PALKA JUN MATTHEW STEPHEN , SACHSENMAIER ROBERT , ZYVOLOSKI KEVIN MARSHALL
IPC: G06F9/06
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).
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公开(公告)号：AU6000090A
公开(公告)日：1991-02-28
申请号：AU6000090
申请日：1990-07-30
Applicant: IBM
Inventor： BEALKOWSKI RICHARD , BLACKLEDGE JOHN WILEY JR , CRONK DOYLE STANFILL , DAYAN RICHARD ALAN , KINNEAR SCOTT GERARD , KOVACH GEORGE D , PALKA MATTHEW STEPHEN JR , SACHSENMAIER ROBERT , ZYVOLOSKI KEVIN MARSHALL
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).
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公开(公告)号：BE1001064A3
公开(公告)日：1989-06-27
申请号：BE8701337
申请日：1987-11-25
Applicant: IBM
Inventor： BEALKOWSKI RICHARD , DAYAN RICHARD ALAN , DORIA DAVID JOSEPH , KINNEAR SCOTT GERARD , KRANTZ JEFFREY I , LIVERMAN ROBERT B , VAISKAUCKAS GARY ANTHONY , SOTOMAYOR GUY G , WILLIAMS DONALD D
Abstract: Système de calcul et méthode d'exploitation d'un système de calcul capable de fonctionner dans des modes d'adressage réel et protégé mutuellement incompatibles, dans lequel des programmes écrits pour un mode peuvent etre exploités dans l'autre mode sans modification, un système BIOS assemblant deux zones de données communes différentes pour les deux modes, chacune comprenant des pointeurs de bloc de dispositif, des pointeurs de table de transfert de fonction, des pointeurs de données et des pointeurs de fonction.
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公开(公告)号：BR8801388A
公开(公告)日：1988-11-01
申请号：BR8801388
申请日：1988-03-25
Applicant: IBM
Inventor： BEALKOWSKI RICHARD , DAYAN RICHARD ALAN , DURIA DAVID JOSEPH , KINNEAR SCOTT GERARD , KRANTZ JEFFREY I , LIVERMAN ROBERT B , SOTOMAYOR GUY G , WILLIAMS DONALD D , VAISKAUCKAS GARY ANTHONY
Abstract: A computer system and method for operating a computer system capable of running in mutually incompatible real and protected addressing modes, in which programs written for one mode can be run in the other mode without modification. The BIOS assembles two different common data areas for the two modes, each inclusive of device block pointers, function transfer table pointers, data pointers, and function pointers. The common data area for the real mode is assembled first. To assemble the pointers for the protected mode common data area, the offset values from the real mode area are copied directly, and then selector values are inserted whose physical addresses correspond to the segments of the corresponding pointers in the real mode area. The selector values are derived from a segment descriptor table.
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