A multistation computer system includes a host computer and a plurality of workstations coupled to the host computer by a communications bus. The host computer is coupled to the communications bus by a host controller and each workstation is coupled to the communications bus by a workstation controller....http://www.google.com.tw/patents/US5053947?utm_source=gb-gplus-share專利 US5053947 - Extended multistation bus system and method
