发明授权
US5022077A Apparatus and method for preventing unauthorized access to BIOS in a
personal computer system
失效
防止个人计算机系统中未经授权访问BIOS的装置和方法
- 专利标题： Apparatus and method for preventing unauthorized access to BIOS in a personal computer system
- 专利标题（中）： 防止个人计算机系统中未经授权访问BIOS的装置和方法
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申请号： US398820申请日： 1989-08-25
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公开(公告)号： US5022077A公开(公告)日： 1991-06-04
- 发明人: Richard Bealkowski , John W. Blackledge, Jr. , Doyle S. Cronk , Richard A. Dayan , Jerry D. Dixon , Scott G. Kinnear , George D. Kovach , Andrew B. McNeill , Matthew S. Palka, Jr. , Robert Sachsenmaier , Edward I. Wachtel , Kevin M. Zyvoloski
- 申请人： Richard Bealkowski , John W. Blackledge, Jr. , Doyle S. Cronk , Richard A. Dayan , Jerry D. Dixon , Scott G. Kinnear , George D. Kovach , Andrew B. McNeill , Matthew S. Palka, Jr. , Robert Sachsenmaier , Edward I. Wachtel , Kevin M. Zyvoloski
- 申请人地址： NY Armonk
- 专利权人： International Business Machines Corp.
- 当前专利权人： International Business Machines Corp.
- 当前专利权人地址： NY Armonk
- 主分类号： G06F13/10
- IPC分类号： G06F13/10 ; G06F9/445 ; G06F12/14 ; G06F21/22
摘要：
An apparatus and method for protecting BIOS stored on a direct access storage device into a personnal 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.