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    • 7. 发明授权
    • Method and apparatus for testing an SDRAM memory used as the main memory in a personal computer
    • 用于测试在个人计算机中用作主存储器的SDRAM存储器的方法和装置
    • US06775795B2
    • 2004-08-10
    • US09789991
    • 2001-02-20
    • Andreas DollManfred MoserAchim Schramm
    • Andreas DollManfred MoserAchim Schramm
    • G11C2900
    • G11C29/56G11C11/401
    • A method and an apparatus for testing an SDRAM are described. The SDRAM is used as a main memory in the PC, and an additional circuit configuration is accommodated on a plug-in board and has an additional memory in the form of an SRAM and logic circuits. The method according to the invention allows the SDRAM to be tested in a module bank in the running PC to be set deliberately to a test mode. In this case the code for test mode activation is modified by a high-level language program (PASCAL) in accordance with the user requirements, is copied to the additional memory on the plug-in board, and is then called by the high-level language program using MS DOS. After activation of the selected test mode by a code programmed in Assembler, a defined jump is made back to the calling program once again. This allows the use of the test mode provided in the SDRAM in standard PCs and using standard operating systems. This greatly increases the test options for SDRAMs on standard PCs.
    • 描述了用于测试SDRAM的方法和装置。 SDRAM用作PC中的主存储器,附加电路配置被容纳在插入板上,并且具有SRAM和逻辑电路形式的附加存储器。 根据本发明的方法允许在运行的PC中的模块组中测试SDRAM被故意地设置为测试模式。 在这种情况下,根据用户需求,通过高级语言程序(PASCAL)修改测试模式激活的代码,被复制到插件板上的附加存储器中,然后由高级别 语言程序使用MS DOS。 通过在汇编程序中编程的代码激活所选的测试模式后,定义的跳转将再次返回到调用程序。 这允许在标准PC中使用SDRAM中提供的测试模式并使用标准操作系统。 这大大增加了标准PC上SDRAM的测试选项。