Papers on Simulation and Historic Systems

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
• "The Evolution of the HP 21xx/1000 I/O Simulation", 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
• "The Unichannel-15", by Bob Supnik PDF
• "The Design of the Simulated PDP15/76," 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
• New!"Mysteries of MMR1," 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
• "How the VAX Lost Its POLY", by Bob Supnik PDF
• "HP's IOP Implementations: 2100 vs 21MX", by Bob Supnik PDF
• "Running HP 2000 Time-Shared BASIC on SIMH", by J. David Bryan 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

Updated 23-Mar-2023 by Bob Supnik (simh AT groups DOT io - anti-spam encoded)