The evolution of the Fastbus general purpose master (GPM)
Conference
·
· IEEE Trans. Nucl. Sci.; (United States)
OSTI ID:6356368
- CERN, European Organization for Nuclear Research, EP Div., Geneva (CH)
The numerous programmable Fastbus masters which are integrated into LEP data acquisition systems are mainly based on the Motorola 68 K microprocessor family. In a Fastbus system, the coupling between the microprocessor bus and the IEEE Fastbus can be solved in different ways: memory mapped, co-processor driven, or list driven. The General Purpose Master (GPM) technique couples the 68 K data bus to Fastbus much like memory mapped I/O. A small set of addresses is provided to select all varieties of the Fastbus protocol. Since any operation in Fastbus can be written like a program, this technique was called ''general purpose''. New projects are building up on the GPM technique and its well established software environment. The CERN CHI interface and the DELPHI/LIP SGPM common project use a new standarized GPM programming model. Porting of the Los Alamos implementation of the IEEE Fastbus standard routines to this new model is under way.
- OSTI ID:
- 6356368
- Report Number(s):
- CONF-871006-
- Conference Information:
- Journal Name: IEEE Trans. Nucl. Sci.; (United States) Journal Volume: 35:1
- Country of Publication:
- United States
- Language:
- English
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