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Elxsi

Elxsi (now Tata Elxsi) was a minicomputer manufacturing company established in the late 1970s along with a host of other competitors ( Trilogy Systems, Sequent, Convex Computer). The Elxsi processor was an Emitter Coupled Logic (ECL) design that featured a 50 nanosecond clock, a 25 nanosecond backpanel bus, IEEE floating point arithmetic and a 64-bit architecture. It allowed multiple processors to communicate over a common bus called the Gigabus. The operating system was a message based operating system called EMBOS. The Elxsi CPU was a microcoded design, allowing custom instructions to be coded into microcode.