The FINUDA data acquisition system a C/C++ DAQ based on ROOT as event monitor

A parallel scalable Data Acquisition based on VME, has been developed to be used in the FINUDA experiment, scheduled to run at the DA/spl Phi/NE machine at Frascati in 1998. The acquisition software runs on embedded RTPC 8067 processors using the LynxOS operating system. The read-out of event fragments is coordinated by a suitable trigger supervisor. Data read by different controllers are transported via dedicated bus to a Global Event Builder running on a PowerPC machine. Commands from and to VME processors are sent via socket based network protocols. The Online Monitor, froot, is based on an object oriented approach in the framework of the ROOT package.