Application of T9000 to CPLEAR

4 The T805 System

The T9000 processor farm has been integrated into the CPLEAR experiment via an existing 32-node T805 data acquisition system (see Fig. 4) which was also developed within the GP-MIMD project. The T805 system, which runs the Chorus distributed operating system [13], is interfaced to the experiment via a B016 module, a Transputer-to-VME interface [14]. Raw data is acquired by the T805 network via the B016 and passed to the T9000 farm, which performs event reconstruction. The reconstructed event data and raw data are transferred back to the T805 system for recording on one of six Exabyte drives. Different Exabyte drives are used for different event types.

Communication within the T805 system is through 20 Mbit/s serial-over-sampled (OS) links. Messages are transmitted between processors as a sequence of single bytes.

Application of T9000 to CPLEAR - 09 NOV 95

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