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Convex was formed in 1982 by Bob Paluck and [[Steve Wallach]] in [[Richardson, Texas]]. It was originally named '''Parsec''' and early prototype and production boards bear that name. They planned on producing a machine very similar in architecture to the [[Cray Research]] [[vector processor]] machines, with a somewhat lower performance, but with a much better [[price/performance ratio]]. In order to lower costs, the Convex designs were not as technologically aggressive as Cray's, and were based on more mainstream chip technology, attempting to make up for the loss in performance in other ways.
Their first machine was the '''C1''', released in 1985. The C1 was very similar to the [[Cray-1]] in general design, but its CPU and main memory was implemented with slower but less expensive CMOS technology. They offset this by increasing the capabilities of the vector units, including doubling the vector registers' length to 128 64-bit elements each.<ref>{{cite web |
The '''C2''' was a crossbar-interconnected [[multiprocessor]] version of the C1, with up to four CPUs, released in 1988. It used newer 20,000-gate CMOS and 10,000-gate [[emitter-coupled logic]] (ECL) gate arrays for a boost in clock speed from 10 MHz to 25 MHz, and rated at 50 MFLOPS peak for double precision per CPU (100 MFLOPS peak for single precision). It was Convex's most successful product.
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Another speed boost used in the '''C3''' and '''C4''', which moved the hardware implementation to [[GaAs]]-based chips, following an evolution identical to that of the Cray machines, but the effort was too little, too late. Some considered the whole C4 program to be nothing more than chasing a business in decline. By this time, even though Convex was the first vendor to ship a [[GaAs]] based product, they were losing money.
In 1994, Convex introduced an entirely new design, known as the '''Exemplar'''. Unlike the C-series vector computer, the Exemplar was a parallel-computing machine that used HP [[PA-7200]] microprocessors, connected together using [[Scalable Coherent Interconnect|SCI]]. First dubbed '''MPP''', these machines were later called '''SPP''' <ref>{{cite conference|first1=R. |last1=Cataneda
[[File:BSC-HP-V-Class.JPG|right|thumb|250px|HP V-Class computer.]]
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Convex had an unusually thorough{{citation needed|date=December 2013}} interview process, which, for technical positions, included a grilling by a group of engineers. The extensive interview process carried over to other departments as well, where the key people who would be working with the prospective employee each interviewed the candidate, then met in roundtable to discuss whether or not to hire.
Convex lasted longer than most [[minisupercomputer]] companies, and to celebrate this and more so to remind themselves of the difficulties of the market, Convex had a graveyard of former competitor companies on its property.<ref>{{cite web |
Ex-employees of Convex jokingly refer to themselves as ''ex-cons''. There is a [http://www.ex-convex.org mailing list] of Convex ex-employees, as well as frequent reunions.
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