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New High-Performance Computer Interfaces to CAMAC

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1 Author(s)
Cleary, Robert T. ; KineticSystems Corporation 11 Maryknoll Drive Lockport, IL 60441

Data acquisition and control systems have often included the need for high throughput between the "front-end" hardware and the host computer. This is particularly true in the aerospace/defense and experimental physics fields. With the advent of more sophisticated I/O hardware and faster host computers with larger memories, the need for higher performance real-time computer interfaces has increased dramatically. A family of CAMAC-based interface products has been developed that supports high data throughput while providing the flexibility to meet the particular application. These new products fall into three basic categories: enhancements to the CAMAC Serial Highway, new CAMAC crate controllers, and software drivers. The Serial Highway enhancements provide at least a five-fold improvement in effective throughput and rival the Parallel Branch Highway in that regard. A new crate controller with a ribbon-cable bus interface uses balanced-line transmission and supports a bus length to 500 feet. List processing is provided as a hardware option for the Serial Highway Driver and is supported by a list sequencer module, an auxiliary crate controller, as well as software device drivers. This paper describes these new products, details their performance, and recommends trade-offs for their application. Benchmark comparisons indicate the extremely high data throughput that has been obtained. With certain configurations, Serial Highway throughput approaching three megabytes per second can be achieved.

Published in:

Nuclear Science, IEEE Transactions on  (Volume:34 ,  Issue: 4 )

Date of Publication:

Aug. 1987

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