公开(公告)号：DE4026912A1

公开(公告)日：1991-02-28

申请号：DE4026912

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 ,  DIXON JERRY DUANE ,  MCNEILL ANDREW BOYCE ,  WACHTEL EDWARD IRVING

IPC: G06F13/10 ,  G06F9/445 ,  G06F12/14 ,  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.

公开(公告)号：SG44409A1

公开(公告)日：1997-12-19

申请号：SG1996000216

申请日：1990-07-04

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 ,  DIXON JERRY DUANE ,  WACHTEL EDWARD IRVING

IPC: G06F9/445 ,  G06F13/10 ,  G06F12/14 ,  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.

公开(公告)号：AU5999390A

公开(公告)日：1991-02-28

申请号：AU5999390

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 ,  DIXON JERRY DUANE ,  WACHTEL EDWARD IRVING

IPC: G06F13/10 ,  G06F9/445 ,  G06F12/14 ,  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.

公开(公告)号：CA2092631C

公开(公告)日：1997-04-08

申请号：CA2092631

申请日：1993-03-12

Applicant: IBM

Inventor： KEENER DON STEVEN ,  MCNEILL ANDREW BOYCE ,  SCHEIERN KEVIN LEE ,  NEWSOM THOMAS HAROLD ,  VOORHEES RICHARD W ,  WACHTEL EDWARD IRVING

IPC: G06F13/36 ,  G06F13/40 ,  G06F13/16

Abstract: Arrangements are disclosed for physically partitioning a bus having a well defined architecture as a physical entity, wherein the partitioning is logically transparent to a computer and devices which communicate through the bus and serves to avoid problems potentially arising because of the scope of actions permitted by the architecture. A typical bus architecture to which present arrangements have relevance is that associated with SCSI (Small Computer System Interface) buses. The potential problems allowed to occur architecturally involve: (a) exposures of data security/integrity; (b) excessive signal degradation due to use of signal rates which although allowed by the architecture are inappropriate for a particular bus loading environment also allowed by the architecture; (c) restrictions preventing parallel transfer of data between the computer and multiple storage devices; (d) restrictions unduly limiting the number of devices attachable to one logical bus path (one input-output channel of the computer). The disclosed arrangement partitions the bus into two or more physical entities which to the computer appears as one logical entity.

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.

公开(公告)号：IN186098B

公开(公告)日：2001-06-16

申请号：IN363DE1993

申请日：1993-04-13

Applicant: IBM

Inventor： KEENER DON STEVEN ,  MCNEILL ANDREW BOYCE ,  NEWSOM THOMAS HAROLD ,  SCHEIERN KEVIN LEE ,  VOORHEES RICHARD W ,  WACHTEL EDWARD IRVING

IPC: G06F13/38

公开(公告)号：CA2085973C

公开(公告)日：1999-03-30

申请号：CA2085973

申请日：1992-12-21

Applicant: IBM

Inventor： MCNEILL ANDREW BOYCE JR ,  WACHTEL EDWARD IRVING

IPC: G06F13/10 ,  G06F13/38 ,  G06F13/12 ,  G06F15/16

Abstract: A SCSI computer system is provided whereby a host computer gains access to a targeted but non-local peripheral device by sending commands via a SCSI bus to a connected SCSI target computer which emulates the targeted peripheral device local to the SCSI target computer to cause the targeted peripheral device to carry out the commands.

公开(公告)号：DE69026018T2

公开(公告)日：1996-10-02

申请号：DE69026018

申请日：1990-09-11

Applicant: IBM

Inventor： KEENER DON STEVEN ,  MCNEILL ANDREW BOYCE ,  WACHTEL EDWARD IRVING

IPC: G06F13/362 ,  G06F13/22 ,  G06F13/24 ,  G06F13/374

Abstract: Apparatus and method for increasing efficiency of command execution from a host processor (11) over an SCSI bus (14). Arbitration, selection and message out functions of SCSI protocol are implemented using a background arbitration state machine (32). Additional protocol functions are implemented in a foreground state machine (26). When the host processor (11) issues a command for access to the SCSI bus (14), the background state machine (32) can be programmed before the foreground machine (26) completes the protocol function for a previous command. Thus, the background state machine (32) is ready to arbitrate for access to the bus (14) at the very next bus free condition.

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

IPC: G06F13/10 ,  G06F9/445 ,  G06F12/14 ,  G06F21/22 ,  G06F12/16 ,  G06F12/06

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.

公开(公告)号：SG42891A1

公开(公告)日：1997-10-17

申请号：SG1996000456

申请日：1993-05-04

Applicant: IBM

Inventor： KEENER DON STEVEN ,  MCNEILL ANDREW BOYCE ,  NEWSOM THOMAS HAROLD ,  SCHEIERN KEVIN LEE ,  VOORHEES RICHARD W ,  WACHTEL EDWARD IRVING

IPC: G06F13/40 ,  G06F13/36

Abstract: Arrangements are disclosed for physically partitioning a bus having a well defined architecture as a physical entity, wherein the partitioning is logically transparent to a computer and devices which communicate through the bus and serves to avoid problems potentially arising because of the scope of actions permitted by the architecture. A typical bus architecture to which present arrangements have relevance is that associated with SCSI (Small Computer System Interface) buses. The potential problems allowed to occur architecturally involve: (a) exposures of data security/integrity; (b) excessive signal degradation due to use of signal rates which although allowed by the architecture are inappropriate for a particular bus loading environment also allowed by the architecture; (c) restrictions preventing parallel transfer of data between the computer and multiple storage devices; (d) restrictions unduly limiting the number of devices attachable to one logical bus path (one input-output channel of the computer). The disclosed arrangement partitions the bus into two or more physical entities which to the computer appears as one logical entity.