Auxiliary/Master microprocessor CAMAC Crate Controller applications

Conference · Wed Jan 01 04:00:00 EST 1975

OSTI ID:4143249

Barsotti, E

The need for further sophistication of an already complex serial CAMAC control system at Fermilab led to the development of an Auxilary/Master CAMAC Crate Controller. The controller contains a Motorola 6800 microprocessor, 2K bytes of RAM, and 8K bytes of PROM memory. Bussed dataway lines are time shared with CAMAC signals to provide memory expansion and direct addressing of peripheral devices without the need of external cabling. The Auxiliary/Master Crate Controller (A/MCC) can function as either a Master, i.e., stand alone, crate controller or as an Auxiliary controller to Fermilab's Serial Crate Controller (SCC). Two modules, one single- and one double-width, make up an A/ MCC. The microprocessor has one nonmaskable and one maskable vectored interrupt. Time sharing the dataway between SCC programmed and block transfer generated dataway cycles and A/MCC operations still allows a 99 percent microprocessor CPU busy time. Since the conception of the A/MCC, there has been an increasing number of control system-related projects proposed which would not have been possible or would have been very difficult to implement without such a device. The first such application now in use at Fermilab is a stand-alone control system for a mass spectrometer experiment in the Main Ring Internal Target Area. This application in addition to other proposed A/MCC applications, both stand-alone and auxiliary, is discussed. (auth)

• Research Organization: Fermi National Accelerator Lab., Batavia, Ill. (USA)
• NSA Number: NSA-33-007931
• OSTI ID: 4143249
• Report Number(s): CONF-751116--4
• Country of Publication: United States
• Language: English

Related Subjects

*CAMAC SYSTEM-- CONTROL SYSTEMS
*MASS SPECTROMETERS-- CONTROL SYSTEMS
430303* --Particle Accelerators--Auxiliaries & Components-- Experimental Facilities & Equipment
N42200 --Engineering--Facilities & Equipment
N54600* --Particle Accelerators--Experimental Facilities
NAL FERMILAB ACCELERATOR
ON-LINE MEASUREMENT SYSTEMS