Burroughs B6x00-7x00 instruction set
Syllable repertoire of B5900, B6500, B7500 and successors / From Wikipedia, the free encyclopedia
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The Burroughs B6x00-7x00 instruction set includes the set of valid operations for the Burroughs B6500,[1] B7500 and later Burroughs large systems, including the current (as of 2006) Unisys Clearpath/MCP systems; it does not include the instruction for other Burroughs large systems including the B5000, B5500, B5700 and the B8500. These unique machines have a distinctive design and instruction set. Each word of data is associated with a type, and the effect of an operation on that word can depend on the type. Further, the machines are stack[lower-alpha 1] based to the point that they had no user-addressable registers.
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Not to be confused with B5000 instruction set.