公开(公告)号：DE69130042T2

公开(公告)日：1999-04-15

申请号：DE69130042

申请日：1991-06-03

Applicant: IBM

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

IPC: G06F3/06 ,  G06F9/445 ,  G06F11/08 ,  G06F11/22 ,  G06F13/10

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：SG43708A1

公开(公告)日：1997-11-14

申请号：SG1996000010

申请日：1993-02-16

Applicant: IBM

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

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

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：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

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

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.