The HISS Computer Facility

Increased computing needs of the Heavy Ion Spectrometer System (HISS) at the LBL Bevalac have prompted the design and construction of a dataacquisition/data analysis computer facility. The design incorporates a VAX 11/780 for data analysis along with a PDP 11/45 for data acquisition (via CAMAC). The two machines communicate via a shared 80 megabyte disk. The design also allows the addition of other data acquisition machines sharing the same disk system. The considerations that led to the selected design are presented along with an overview of the planned software systems.