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30 lines
1.5 KiB
Markdown
30 lines
1.5 KiB
Markdown
# Installation of the SimH pdp11 simulator
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The w11 project uses the pdp11 simulator from the
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[SimH](https://en.wikipedia.org/wiki/SIMH) project. The project was started
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by Bob Supnik under [simh.trailing-edge.com](http://simh.trailing-edge.com).
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This site contains the "classic" version of SimH, the 3.X stream, with v3.11-1
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as the last release. Since about 2014 the project is continued by a team led by
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Mark Pizzolato as GitHub project [simh/simh](https://github.com/simh/simh).
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The new, functionally much enhanced, version is called V4.*. However, the
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team decided not to provide releases anymore, just a stream of commits,
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more than 4200 as of April 2022.
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Debian and Ubuntu offer `simh` packages, but with the obsolete version V3.8.1,
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released in February 2009. The main obstacle to the inclusion of newer
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versions is, according to the Debian maintainer, the unclear license situation.
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The only practical way to obtain the pdp11 simulator is by installation from
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sources. The GitHub repository contains also the classical versions, nicely
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marked with tags.
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The `scmd` scripts provided in the w11 project were originally developed for
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SimH 3.8, and worked for SimH 3.9 and later releases. The SimH 4.* development
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over time became incompatible with the `scmd` scripts used for w11 verification.
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See issue [#30](https://github.com/wfjm/w11/issues/30) for details.
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The bottom line at the moment:
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- install SimH from [simh/simh](https://github.com/simh/simh)
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- checkout `v3.11-1`
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