A FASTBUS Segment Management and Interface Unit

A FASTBUS Segment Management and Interface Unit is described which employs a 40 MHz discrete ECL sequencer to carry out FASTBUS operations at full FASTBUS speed (10 MHz). The unit operates as a Master or a Slave and it interfaces to other FASTBUS crates, to CAMAC or to a host computer. It may be user programmed, however, firmware within the unit allows the most common FASTBUS primitives and macros to be executed by simple calls from the host either individually or as lists.