BaBar on-line prototype development

The BaBar on-line system has begun construction of a prototype which will serve as a test bench and beam test system. The system architecture is based on single board computers running VxWorks, linked to Unix workstations via ethernet (as well as tests with FDDI). This early system is based on the Experimental Physics and Industrial Control System, which provides both control of state transitions and monitoring facilities. This functionality is achieved with no software investment: native EPICS utilities are used to develop screen displays and control panels. Emphasis at this time is on the incorporation of reusable code. The first application of this prototype is the creation of testbed for the BaBar data flow research and development. (author)