Burroughs Large Systems - B6500


The B6500 and B7500 were the first computers in the only Burroughs system to survive to the present day. While they were inspired by the B5000, they had a totally new architecture. Among the most important differences were

  • The B6500 had variable length instructions with an 8-bit syllable instead of fixed length instructions with a 12-bit syllable.
  • The B6500 had a 51-bit instead of a 48-bit word, and used 3 bits as a tag
  • The B6500 had Symmetric Multiprocessing (SMP)
  • The B6500 had a Saguaro stack
  • The B6500 had paged arrays
  • The B6500 had a Display to allow nested subroutines to access variables in outer blocks.

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