Data processing unit and method for controlling overwrited by non-volatility storage device

A technology of non-volatile storage and data processing equipment, which is applied in the direction of electrical digital data processing, computer security devices, digital computer components, etc., and can solve problems such as BIOS damage

Inactive Publication Date: 2006-12-06
TOSHIBA CLIENT SOLUTIONS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the BIOS on any personal computer executing the software will be corrupted

Method used

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  • Data processing unit and method for controlling overwrited by non-volatility storage device
  • Data processing unit and method for controlling overwrited by non-volatility storage device
  • Data processing unit and method for controlling overwrited by non-volatility storage device

Examples

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Embodiment Construction

[0033] An embodiment of the present invention will be described based on the drawings.

[0034] Figure 1 shows a computer system which is an embodiment of the present invention. The system is a notebook personal computer that can be driven by a battery. The computer includes a processor bus 1, a PCI bus 2, an ISA bus 3, a CPU 11, a main PCI bridge 12, a main memory 13, a display controller 14, a PCI-ISA bridge 15, an I / O controller 16, a communication device 17, and a flash memory. Fast (Flash) BIOS-ROM 18 and EEPROM 19.

[0035] A CPU (Central Processing Unit) 11 controls some other elements of the computer. It executes an operating system (OS), a ROM rewriting program, etc. loaded in the main memory 13 . ROM rewrite program is software designed to rewrite flash BIOS-ROM18. It is application software that works when the CPU 11 executes the OS. While executing the OS, the CPU 11 can execute a ROM rewriting program to update the BIOS stored in the flash BIOS-ROM 18 .

[0...

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PUM

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Abstract

In a computer, software may make an access to a controller in order to rewrite the contents of a nonvolatile storage device. If so, an interruption signal is automatically supplied to a CPU. In response to the interruption signal the CPU stops executing the software and starts performing an interruption process. During the interruption process it is determined whether the access made by the software is a right one. If the access is a wrong one, the rewriting of the contents of the nonvolatile storage device is prohibited at once.

Description

technical field [0001] The present invention relates to a data processing apparatus, such as a personal computer, which has a nonvolatile storage device, and to a control method for rewriting of the nonvolatile storage device incorporated in the data processing apparatus. Background technique [0002] In recent years, various portable, battery-driven notebook personal computers have been developed. Each notebook personal computer contains an electrically programmable nonvolatile memory device such as a flash memory. The nonvolatile memory device stores BIOS (Basic Input / Output System). It can be electrically programmable, whereby the BIOS can be easily updated to a new version. [0003] There are generally two types of objects that are required to update the BIOS in a personal computer. The first type of object is a new version BIOS image file (image file). The second object is a floppy disk (FD) that stores the BIOS update system program. The floppy disk is inserted in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F15/00G06F12/14G06F13/42G06F21/12G06F21/44G06F21/60G06F21/62G06F21/79
CPCG06F13/4239
Inventor 前田真弓
Owner TOSHIBA CLIENT SOLUTIONS CO LTD
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