A High Capacity FASTBUS Multiple Event Buffer

We have developed a front-end data acquisition and event buffering memory. This single-width FASTBUS module has a capacity of 256K × 32 bits plus parity. The module is dual ported, and its front panel ECLport accepts data at up to 20 MB/sec. It may also be written to and read from as a standard FASTBUS Slave. The module records events as variable length records. Each record is accepted or rejected via front panel control signal. Circuitry to automate FASTBUS record readout and record skip is provided. In its "linear" modé, the module may be used as a single pass list. Alternativelý, in the "circular" modé, the module's internal read pointer can follow its write pointer continuously around the memory. Circular mode is well suited to handling of a continuous data stream. Modules may be linked for larger memory capacity.