Networked VAX/LSI/CAMAC Data Acquisition System Development
Abstract
Recent development of the Caltech data acquisition system installed in 1981, which runs on a VAX-11/750, a Peritek Q-bus network, LSI-11s, and CAMAC, is described. In this system, the DEC VMS and RT-11 operating systems are supported on the VAX "host" and LSI-11 "front-end" computers by a VMS device driver and network host program, and a bootable RT-11 device driver. Network "utility" and "control" programs provide general purpose support for communication between front-end and host software. Data acquisition software tools are provided for writing programs to run nuclear physics experiments. A system similar to Caltech's was installed at the University of Rochester in 1982. The network has been tested for speed and real-time response. After including all software overhead required by data acquisition, it was found that the system could transfer buffers and acknowledge their receipt at a net speed of 127 KB per second with a 35% load on the host computer. The network software is currently being rehosted on Ethernet hardware at Caltech in a multiple host - many front-end computer configuration. Compatibility with the current Peritek network software will be maintained.
Additional Information
© IEEE. Date of Current Version: 12 November 2007. Thanks are due to the following Contributors to the systems described in this paper: At the W.K. Kellogg Radiation Laboratory, Caltech, K. McLoughlin, D. Potterveld, R. McKeown; in the Engineering Division at Caltech, P. Dimotakis; at the Nuclear Structure Research Laboratory, Uni versi ty of Rochester, T. Lund and P. Blazer. This project has been supported in part by NSF grants PHY79-23638 at the California Institute of Technology and PHY79-23307 at the University of Rochester. The rehosting of the network on Ethernet has also been supported in part by the Engineering Division of the California Institute of Technology.Attached Files
Published - 04333017.pdf
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Additional details
- Eprint ID
- 51450
- Resolver ID
- CaltechAUTHORS:20141107-134456391
- PHY79-23638
- NSF
- PHY79-23307
- NSF
- Caltech Engineering Division
- Created
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2014-11-07Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field