Storage access system and its memory access method

存储器存取系统与其存储器存取方法

Abstract

一种存储器存取系统,用以存取基本输入输出系统(BIOS)程序,包括闪存、中央处理器、周边组件连结接口(PCI)从属端、地址转换单元与闪存控制器。闪存储存BIOS程序的数个BIOS数据。每个BIOS数据对应一预设BIOS地址。每个BIOS数据位于一闪存型BIOS地址。中央处理器发出BIOS存取指令。BIOS存取指令对应预设BIOS地址其中的一预设目标地址。PCI从属端解译BIOS存取指令后,地址转换单元转换预设目标地址为闪存型目标地址。闪存型目标地址为闪存型BIOS地址之一。闪存控制器据以存取位于闪存型目标地址的BIOS数据。
The invention relates to a memory access system for accessing basic input and output system (BIOS) program, including a flash memory, a microprocessor, a subordination of peripheral components link interface (PCI), an address -converting module and a flash controller. The flash memory stores numbers of BIOS data. Each of BIOS data corresponds to a predetermined BIOS address. Each BIOS data is at a flash BIOS address. CPU generates an instruction of BIOS access. The instruction corresponds to one of the predetermined BIOS target addresses. The address- converting module converts the predetermined address into the flash BIOS target address after PCI-subordination decodes BIOS access instructions. The flash BIOS target address is one of the addresses of flash BIOS. The flash controller accesses BIOS data according to the flash BIOS target address.

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Cited By (5)

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