A prototype data acquisition system for the BELLE vertex detector

A prototype data acquisition (DAQ) system for the BELLE silicon vertex detector has been constructed. We measured its performance using a test board for front-end readout system emulation. While signals are generated in a test module, the process sequence of interrupt, data transfer, digitization are set up as a design which we will adopt in the final production. In this report we discuss the detail of the DAQ system and its data processing capability. We then conclude that the prototype system is satisfied with the requirement initially given to the system construction.