Papers on Simulation and Historic Systems - parsa/simh GitHub Wiki

These papers were written to present the rationale for SIMH, to document SIMH, or to document relatively obscure architectural or implementation details in historic systems.

  • "Preserving Computing's Past: Restoration and Simulation", by Max Burnet and Bob Supnik, from the Digital Technical Journal, Volume 8, Number 3, 1996 (PDF)
  • "SIMH: Forward Into The Past", a presentation to the Vintage Computer Festival East, 16-Jul-2004 (PDF)
  • "Writing a Simulator for the SIMH System", by Bob Supnik (PDF)
  • "Adding an I/O Device to a SIMH Virtual Machine", by Bob Supnik (PDF)
  • "A Revised I/O Simulation for the HP 21xx/1000", by J. David Bryan (PDF)
  • "The SIMH Breakpoint System", by Bob Supnik (PDF)
  • "SIMH Magtape Representation and Handling", by Bob Supnik (PDF)
  • "Architectural Evolution in DEC's 18b Computers", by Bob Supnik (PDF)
  • New! "The Unichannel-15", by Bob Supnik (PDF)
  • "Decoding the H316/H516 'Generic A' Instructions", by Bob Supnik (PDF)
  • "Unearthing the PDP-15 Operating Systems", by Bob Supnik (PDF)
  • "PDP-11 Interrupts: Variations on a Theme", by Bob Supnik (PDF)
  • "Bug, Feature, or Code Rot? Adventures in O/S Debugging", by Bob Supnik (PDF)
  • "A Massbus Mystery, or, Why Primary Sources Matter, Even In Computer History", by Bob Supnik - documenting the oldest extant bug in VAX/VMS (PDF)
  • "The Case Of The Missing PLA Term, or, Microcode Bugs I Have Known", by Bob Supnik (PDF)
  • New! "How the VAX Lost Its POLY" (PDF)
  • "HP's IOP Implementations: 2100 vs 21MX", by Bob Supnik (PDF)
  • "CTSS Hardware", by Bob Supnik (PDF)
  • "Technical Notes on DECsys", by Bob Supnik (PDF)
  • "What was the PDP-X?", by Bob Supnik (PDF)
  • "Card Readers for DEC's 18b Systems", by Bob Supnik (PDF)
  • "VAX Processor Chart", by Bob Supnik (text)
  • Three late 1980's presentations on the design of VLSI VAXen, by Bob Supnik:
    1. "VLSI VAX Micro-Architecture" (PDF)
    2. "Microcoding Considered as a Fine Art" (PDF)
    3. "CVAX and Rigel: The Development Process" (PDF)
⚠️ **GitHub.com Fallback** ⚠️