HITAC S-810

The HITAC S-810 was a family of vector supercomputers designed, built and sold by Hitachi. First announced in August 1982, it was the second Japanese supercomputer, coming just after the Fujitsu VP-200 and just before the NEC SX-2, and it was Hitachi's first machine sold as a supercomputer. The first system shipped, a top-end S-810/20, was delivered to the Large Computer Center of the University of Tokyo in October 1983. The design extended the IBM System/370 instruction set with 83 vector instructions, using a Hitachi HITAC M-280H mainframe as its scalar processor and a separate vector unit with 256-element, 64-bit vector registers. Three models were offered, the S-810/5, S-810/10 and S-810/20, which differed in the number of vector pipelines, registers and memory, and which Hitachi rated at peak speeds of 160, 315 and 630 megaflops. Hitachi announced the HITAC S-820 as its top-end successor in July 1987.