Cray X-MP Processor Board
The X-MP system was Cray's first multi-processor system. It had shared memory and a small number of typical Cray vector processors. This is one of about 90 boards that made up a single processor. Later versions of this machine had four processors and gather-scatter capability. The address size of this machine was 24 bits, but a later EA model introduced the theoretical capability of addressing up to 2 gigawords.
Buddy Bland/Oak Ridge National Laboratory
"Cray X-MP Processor Board." www.scxyhistory.org, Item #53 (accessed May 25 2013, 3:45 am)