-
公开(公告)号：US5479639A
公开(公告)日：1995-12-26
申请号：US279692
申请日：1994-08-26
CPC分类号： G06F12/0623 , G06F2212/2022
摘要： A computer system wherein a paging technique is used to expand the useable non-volatile memory capacity beyond a fixed address space limitation. The computer system of the preferred embodiment includes a flash memory component for storing non-volatile code and data including a system BIOS in the upper 128K of memory. The useful BIOS memory space is effectively increased while maintaining the address boundary of the upper 128K region. The address space of the non-volatile memory device is logically separated into distinct pages of memory (Pages 1-4). Using the apparatus and techniques of the present invention, Page 1, Page 3 and Page 4 may be individually swapped into the address space originally occupied by Page 1 (the swappable page area). In the preferred embodiment, Page 2 is held static and thus is not used as a swap area. Each of the swappable pages, Page 1, Page 3, and Page 4, contain processing logic called swapping logic used during the swapping or paging operation. The swapping logic operates in conjunction with paging hardware to effect the swapping of pages into the swappable page area. The high order processor address lines are input by a page decoder. The page decoder is used to modify the address actually presented to the non-volatile memory device. A page register provides a means by which the processor may select a page in non-volatile memory. In an alternative embodiment of the present invention, several different forms of configuration or identification information may be stored in a page of non-volatile memory.
摘要翻译： 一种计算机系统，其中使用寻呼技术来扩展可用的非易失性存储器容量超过固定的地址空间限制。 优选实施例的计算机系统包括用于存储非易失性代码的闪存组件和包括存储器的上部128K中的系统BIOS的数据。 有效地增加了有用的BIOS存储器空间，同时保持了上128K区域的地址边界。 非易失性存储器件的地址空间在逻辑上分成不同的存储器页（1-4页）。 使用本发明的装置和技术，第1页，第3页和第4页可以单独交换到原来由第1页（可交换页面区域）占用的地址空间中。 在优选实施例中，保持静止，因此不用作交换区域。 每个可交换页面，第1页，第3页和第4页都包含称为在交换或寻呼操作期间使用的交换逻辑的处理逻辑。 交换逻辑与分页硬件一起运行，以实现将页面交换到可交换页面区域。 高阶处理器地址线由页解码器输入。 页面解码器用于修改实际呈现给非易失性存储器件的地址。 页面寄存器提供了处理器可以在非易失性存储器中选择页面的手段。 在本发明的替代实施例中，可以将多种不同形式的配置或识别信息存储在非易失性存储器的页面中。
-
公开(公告)号：US5579522A
公开(公告)日：1996-11-26
申请号：US505995
申请日：1995-07-24
CPC分类号： G06F8/67 , G06F11/1433 , G06F8/65
摘要： A computer system wherein a portion of code/data stored in a non-volatile memory device can be dynamically modified or updated without removing any covers or parts from the computer system. The computer system of the preferred embodiment includes a flash memory component coupled to a computer system bus for storing non-volatile code and data. Using the present invention, the contents of a portion of the flash memory may be replaced, modified, updated, or reprogrammed without the need for removing and/or replacing any computer system hardware components. The flash memory device used in the preferred embodiment contains four separately erasable/programmable non-symmetrical blocks of memory. One of these four blocks may be electronically locked to prevent erasure or modification of its contents once it is installed. This configuration allows the processing logic of the computer system to update or modify any selected block of memory without affecting the contents of other blocks. One memory block contains a normal BIOS. An electronically protected flash memory area is used for storage of a recovery BIOS which is used for recovery operations. The present invention also includes hardware for selecting one of the two available update modes: normal or recovery. Thus, using a mode selection apparatus, either a normal system BIOS or a recovery BIOS may be activated.
摘要翻译： 一种计算机系统，其中存储在非易失性存储器设备中的代码/数据的一部分可以被动态地修改或更新，而不用从计算机系统中移除任何盖子或部件。 优选实施例的计算机系统包括耦合到计算机系统总线的闪存组件，用于存储非易失性代码和数据。 使用本发明，可以更换，修改，更新或重新编程闪存的一部分的内容，而不需要移除和/或替换任何计算机系统硬件组件。 在优选实施例中使用的闪存器件包含四个可分离的可擦除/可编程非对称的存储器块。 这四个块中的一个可以被电子锁定，以防止其被安装后的内容的擦除或修改。 该配置允许计算机系统的处理逻辑更新或修改任何选定的存储块，而不影响其他块的内容。 一个内存块包含一个普通的BIOS。 电子保护的闪存区域用于存储用于恢复操作的恢复BIOS。 本发明还包括用于选择两种可用更新模式之一的硬件：正常或恢复。 因此，使用模式选择装置，可以激活正常系统BIOS或恢复BIOS。
-
公开(公告)号：US5930504A
公开(公告)日：1999-07-27
申请号：US686170
申请日：1996-07-22
申请人： Douglas L. Gabel
发明人： Douglas L. Gabel
摘要： An improved process for updating a nonvolatile memory of a computer system includes selecting a logical area of the nonvolatile memory to update. Protected procedures are copied from one of the selected logical area and an update file. Information from the update file is copied to the nonvolatile memory in accordance with the copied protected procedures. Another method of updating the nonvolatile memory includes selecting at least a portion of the nonvolatile memory to update. Protected procedures including an updated memory map are copied from an update file. Information from the update file is copied to the nonvolatile memory in accordance with the copied protected procedures. An update file to facilitate the improved update processes includes a header section and a update information section. The update information section includes updated code and data for the nonvolatile memory. The header includes a code usage indicator, and offsets to an update table and protected procedures in order to facilitate the update process. The code usage indicator indicates whether the protected procedures are copied from the update file or the nonvolatile memory. The offsets locate the update table and the protected procedures within the update file so that they can be copied to the system memory for use during the update process.
摘要翻译： 用于更新计算机系统的非易失性存储器的改进过程包括选择非易失性存储器的逻辑区域以进行更新。 受保护的程序从所选逻辑区域和更新文件之一复制。 来自更新文件的信息根据复制的受保护程序复制到非易失性存储器。 更新非易失性存储器的另一种方法包括选择非易失性存储器的至少一部分进行更新。 受保护的程序，包括更新的内存映射，从更新文件复制。 来自更新文件的信息根据复制的受保护程序复制到非易失性存储器。 用于促进改进的更新过程的更新文件包括报头部分和更新信息部分。 更新信息部分包括用于非易失性存储器的更新的代码和数据。 标题包括代码使用指示符，以及对更新表和受保护程序的偏移量，以便于更新过程。 代码使用指示器指示受保护的程序是否从更新文件或非易失性存储器复制。 偏移量定位更新表和更新文件中的受保护的过程，以便将其复制到系统内存以供更新过程中使用。
-
-
搜索结果
3 条记录 (耗时 0.018 秒)
