公开(公告)号：NZ245756A

公开(公告)日：1995-12-21

申请号：NZ24575693

申请日：1993-01-26

Applicant: IBM

Inventor： BLACKLEDGE JOHN WILEY ,  CLARKE GRANT LEACH ,  DAYAN RICHARD ALAN ,  LE KIMTHANH DO ,  MCCOURT PATRICK EDWARD ,  MITTELSTEDT MATTHEW TODD ,  MOELLER DENNIS LEE ,  NEWMAN PALMER EUGENE ,  RANDALL DAVE LEE ,  YODER JOANNA BERGER

IPC: G06F9/06 ,  G06F12/14 ,  G06F21/00 ,  G06F11/00 ,  G06F21/06 ,  G06F21/22 ,  G06F21/24 ,  G06F1/16

Abstract: This invention relates to personal computer systems and, more particularly, to such a system having security features enabling control over access to data retained in such a system. In particular, a personal computer system in accordance with this invention has a normally closed enclosure, an erasable memory element for selective activation to active and inactive states and for receiving and storing a privileged access password when in the active state, an option switch operatively connected with the erasable memory element for setting the erasable memory element to the active and inactive states, a tamper detection switch operatively connected with the erasable memory element for detecting opening of the enclosure and for clearing any stored privileged access password from the erasable memory element in response to any switching of the tamper switch, and a system processor operatively connected with the erasable memory element for controlling access to at least certain levels of data stored within the system by distinguishing between the active and inactive states of the memory element and between entry and non-entry of any stored privileged access password. In the presently preferred form of the invention, two non-volatile erasable memory elements are provided, one an EEPROM and the other battery backed CMOS RAM.

公开(公告)号：AU663551B2

公开(公告)日：1995-10-12

申请号：AU3201993

申请日：1993-01-25

Applicant: IBM

Inventor： BLACKLEDGE JOHN WILEY JR ,  CLARKE GRANT LEACH JR ,  DAYAN RICHARD ALAN ,  LE KIMTHANH DO ,  MCCOURT PATRICK EDWARD ,  MITTELSTEDT MATTHEW TODD ,  MOELLER DENNIS LEE ,  NEWMAN PALMER EUGENE ,  RANDALL DAVE LEE ,  YODER JOANNA BERGER

IPC: G06F11/00 ,  G06F9/06 ,  G06F12/14 ,  G06F21/00 ,  G06F21/06 ,  G06F21/22 ,  G06F21/24

Abstract: This invention relates to personal computer systems and, more particularly, to such a system having security features enabling control over access to data retained in such a system. In particular, a personal computer system in accordance with this invention has a normally closed enclosure, an erasable memory element for selective activation to active and inactive states and for receiving and storing a privileged access password when in the active state, an option switch operatively connected with the erasable memory element for setting the erasable memory element to the active and inactive states, a tamper detection switch operatively connected with the erasable memory element for detecting opening of the enclosure and for clearing any stored privileged access password from the erasable memory element in response to any switching of the tamper switch, and a system processor operatively connected with the erasable memory element for controlling access to at least certain levels of data stored within the system by distinguishing between the active and inactive states of the memory element and between entry and non-entry of any stored privileged access password. In the presently preferred form of the invention, two non-volatile erasable memory elements are provided, one an EEPROM and the other battery backed CMOS RAM.

公开(公告)号：DE3786660T2

公开(公告)日：1994-02-17

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

IPC: G06F9/06 ,  G06F12/02 ,  G06F12/08 ,  G06F12/10 ,  G06F12/14

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.

公开(公告)号：HK136193A

公开(公告)日：1993-12-17

申请号：HK136193

申请日：1993-12-09

Applicant: IBM

Inventor： AGOGILA ROBERT JOHN ,  DAYAN RICHARD ALAN ,  SMITH BRUCE ALAN

IPC: G06F3/06 ,  G11B19/00

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.

公开(公告)号：ES2042531T3

公开(公告)日：1993-12-16

申请号：ES87118538

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

IPC: G06F9/06 ,  G06F12/02 ,  G06F12/08 ,  G06F12/10 ,  G06F12/14

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.

公开(公告)号：NZ238650A

公开(公告)日：1993-07-27

申请号：NZ23865091

申请日：1991-06-21

Applicant: IBM

Inventor： ARNOLD LISA RUOTOLO ,  BEALKOWSKI RICHARD ,  BLACKLEDGE JOHN WILEY ,  CRONK DOYLE STANFILL ,  DAYAN RICHARD ALAN ,  GEISLER DOUGLAS RICHARD ,  PALKA MATTHEW STEPHEN ,  PAUL JOHN DAVID ,  SACHSENMAIER ROBERT ,  SMELTZER KENNETH DONALD ,  WOYTOVECH ANDREW PETER ,  ZYVOLOSKI KEVIN MARSHALL ,  MITTELSTEDT MATTHEW TODD

IPC: G06F3/06 ,  G06F9/445 ,  G06F11/08 ,  G06F11/22 ,  G06F13/10 ,  G06F9/44 ,  G06F12/14 ,  G06F12/16

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 initialise 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.

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).

公开(公告)号：HK34793A

公开(公告)日：1993-04-16

申请号：HK34793

申请日：1993-04-08

Applicant: IBM

Inventor： BERENS ROBERT EUGENE ,  BRADLEY DAVID JOHN ,  BUCKLEY LINDA KAY ,  DAYAN RICHARD ALAN ,  SMITH BRUCE ALAN

IPC: G06F3/06 ,  G06F13/38 ,  G11B19/12 ,  G11B20/12 ,  G11B33/10 ,  G11B23/40 ,  G11B19/02 ,  G06F13/42

Abstract: Diskette media and drive determination mechanism in which a diskette controller attempts to read the diskette according to a variety of formats having, for instance, different data transfer rates. A successful read is registered by the controller and that format is thereafter identified with the diskette drive and the diskette media inserted in the drive.

公开(公告)号：DE3584043D1

公开(公告)日：1991-10-17

申请号：DE3584043

申请日：1985-06-05

Applicant: IBM

Inventor： BERENS ROBERT EUGENE ,  BRADLEY DAVID JOHN ,  BUCKLEY LINDA KAY ,  DAYAN RICHARD ALAN ,  SMITH BRUCE ALAN

IPC: G06F3/06 ,  G06F13/38 ,  G11B19/12 ,  G11B20/12 ,  G11B33/10 ,  G11B23/40 ,  G11B19/02 ,  G06F13/42

Abstract: Diskette media and drive determination mechanism in which a diskette controller attempts to read the diskette according to a variety of formats having, for instance, different data transfer rates. A successful read is registered by the controller and that format is thereafter identified with the diskette drive and the diskette media inserted in the drive.

公开(公告)号：GB2202657B

公开(公告)日：1991-09-18

申请号：GB8728922

申请日：1987-12-10

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

IPC: G06F9/06 ,  G06F12/02 ,  G06F12/08 ,  G06F12/10 ,  G06F12/14

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.