SLAC CAMAC Crate Controller CCU2 with Auxiliary Controller Bus Interface

The development of a new CAMAC type U crate controller, compatible with the SLAC parallel branch high-way, is described. The controller also provides an interface for the Standard Auxiliary Controller Bus, control and timing logic to implement a handshake system between the host computer and the crate controller, an internal timing generator for Dataway cycles, and a LAM handling facility with priority arbitration along the parallel branch highway. A highly integrated module implementation was achieved through extensive use of firmware and finite state logic machine realizations of many crate controller functions.