Cray J90
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The Cray J90 series (code-named Jedi during development) was an air-cooled vector processor supercomputer first sold by Cray Research in 1994. The J90 evolved from the Cray Y-MP EL minisupercomputer, and was compatible with Y-MP software, running the same UNICOS operating system. The J90 supported up to 32 CMOS processors with a 10 ns (100 MHz) clock. It supported up to 4 GB of main memory and up to 48 GB/s of memory bandwidth, giving it considerably less performance than the contemporary Cray T90, but making it a strong competitor to other technical computers in its price range. All input/output in a J90 system was handled by an IOS (Input/Output Subsystem) called IOS Model V. The IOS-V was based around SPARC processors, the VME64 bus, and the VxWorks RTOS.
The J90 was available in three basic configurations, the J98 with up to eight processors, the J916 with up to 16 and the J932 with up to 32.
In 1997 the J90se series became available, which doubled the speed of the processors to 200 MHz and added support for the GigaRing I/O system found on the Cray T3E and Cray SV1, replacing IOS-V. Later, SV1 processors could be installed in a J90se, further increasing performance within the same frame.
