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  <TITLE>Papers on Simulation and Historic Systems</TITLE>
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<H1 ALIGN=Center>
  Papers on Simulation and Historic Systems
</H1>
<P>
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.
<P>
<UL>
  <LI>
    "Preserving Computing's Past: Restoration and Simulation", by Max Burnet
    and Bob Supnik, from the Digital Technical Journal, Volume 8, Number 3, 1996
    (<A HREF="docs/dtjn02pf.pdf">PDF</A>)
  <LI>
    "SIMH: Forward Into The Past", a presentation to the Vintage Computer Festival
    East, 16-Jul-2004 (<A HREF="docs/simh_vcf.pdf">PDF</A>)
  <LI>
    "Writing a Simulator for the SIMH System", by Bob Supnik
    (<A HREF="docs/simh.pdf">PDF</A>)
  <LI>
    "Adding an I/O Device to a SIMH Virtual Machine", by Bob Supnik
    (<A HREF="docs/simh_vmio.pdf">PDF</A>)
  <LI>
    "A Revised I/O Simulation for the HP 21xx/1000", by J. David Bryan
    (<A HREF="docs/hp_1000_io_simulation.pdf">PDF</A>)
  <LI>
    "The SIMH Breakpoint System", by Bob Supnik
    (<A HREF="docs/simh_breakpoints.pdf">PDF</A>)
  <LI>
    "SIMH Magtape Representation and Handling", by Bob Supnik
    (<A HREF="docs/simh_magtape.pdf">PDF</A>)
  <LI>
    "Architectural Evolution in DEC's 18b Computers", by Bob Supnik
    (<A HREF="docs/architecture18b.pdf">PDF</A>)
  <LI>
    "Decoding the H316/H516 'Generic A' Instructions", by Bob Supnik
    (<A HREF="docs/decodingh316.pdf">PDF</A>)
  <LI>
    "Unearthing the PDP-15 Operating Systems", by Bob Supnik
    (<A HREF="docs/advmonsys.pdf">PDF</A>)
  <LI>
    "PDP-11 Interrupts: Variations on a Theme", by Bob Supnik
    (<A HREF="docs/pdp11interrupts.pdf">PDF</A>)
  <LI>
    "Bug, Feature, or Code Rot? Adventures in O/S Debugging", by Bob Supnik
    (<A HREF="docs/bugfeature.pdf">PDF</A>)
  <LI>
    "A Massbus Mystery, or, Why Primary Sources Matter, Even In Computer History",
    by Bob Supnik - documenting the oldest extant bug in VAX/VMS
    (<A HREF="docs/massbusmystery.pdf">PDF</A>)
  <LI>
    "The Case Of The Missing PLA Term, or, Microcode Bugs I Have Known", by Bob
    Supnik (<A HREF="docs/ucode_bugs.pdf">PDF</A>)
  <LI>
    <FONT COLOR="Green"><B>New! </B></FONT>"How the VAX Lost Its POLY"
    (<A HREF="docs/vax_poly.pdf">PDF</A>)
  <LI>
    "HP's IOP Implementations: 2100 vs 21MX", by Bob Supnik
    (<A HREF="docs/hpiop.pdf">PDF</A>)
  <LI>
    "CTSS Hardware", by Bob Supnik (<A HREF="docs/ctss_hardware.pdf">PDF</A>)
  <LI>
    "Technical Notes on DECsys", by Bob Supnik
    (<A HREF="docs/decsys.pdf">PDF</A>)
  <LI>
    "What was the PDP-X?", by Bob Supnik (<A HREF="docs/pdpx.pdf">PDF</A>)
  <LI>
    "Card Readers for DEC's 18b Systems", by Bob Supnik
    (<A HREF="docs/card_readers_18b.pdf">PDF</A>)
  <LI>
    "VAX Processor Chart", by Bob Supnik (<A HREF="docs/vax_proc.txt">text</A>)
  <LI>
    Three late 1980's presentations on the design of VLSI VAXen, by Bob Supnik:
    <OL>
      <LI>
	"VLSI VAX Micro-Architecture" (<A HREF="docs/microarch.pdf">PDF</A>)
      <LI>
	"Microcoding Considered as a Fine Art" (<A HREF="docs/microcode.pdf">PDF</A>)
      <LI>
	"CVAX and Rigel: The Development Process"
	(<A HREF="docs/devprocess.pdf">PDF</A>)
    </OL>
</UL>
<H4>
    <HR>
</H4>
<P>
<I><SMALL>Updated 24-Sep-2011 by Bob Supnik (simh AT trailing-edge DOT com
- anti-spam encoded)</SMALL></I>
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