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32位通用微处理器Intel 80386的最大特征是在CPU芯片上制作了存贮器管理部件,可对虚拟存贮器和物理存贮器进行分页和分段管理,并提供软件保护功能。同时,80386保证了Intel86产品的向上兼容性,使8086、80186及80286的软件可不加修改即可在80386下执行,而新开发的32位软件又可使这些现有的软件可以在多任务方式下运行。本文从80386的体系结构上对此加以简要的分析和阐述。
32-bit general-purpose microprocessor Intel 80386 is the most prominent feature of the CPU chip has made memory management components, virtual memory and physical memory paging and segmentation management, and provide software protection. At the same time, 80386 to ensure the upward compatibility of Intel86 products, so 8086,80186 and 80286 software can be modified without modification at 80386 under the implementation of the newly developed 32-bit software and these existing software can make the multi-task mode Run under. This article from the 80386 architecture on this a brief analysis and elaboration.