Abstract: Aimed at host venture and low efficiency in the system bus-based，a kind of hostless multiprocessor architecture on C-PCI bus is defined，based on Intel 21554，the communication model among processors domains is established.It can not only solve key problems in the traditional system，but also provide system-level redundancy mode with flexibility，make the assembling density of processor-card and computing ability of data to be maximized.

Key words: hostless multiprocessor, C-PCI bus, non-transparent bridge, address map

摘要： 针对总线型计算机的主机风险与主机效率问题，提出了一种无主多处理器结构，以Intel-21554非透明桥为硬件基础，在这种结构中建立了处理器域之间的地址映射模型。这不但能够解决传统系统面临的根本问题，同时提供了灵活的系统级备份模式，具有最高处理器安装密度以及信息处理能力，系统的综合性能被最大化。

关键词: 无主多处理器, C-PCI总线, 非透明桥, 地址映射