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Adv550, version September 18, 1984

This is Adv550 built from Dave Platt's
Honeywell A-code source dated
September 18, 1984.

Suggested console mode icon

Unlike other implementations of adv550, this version is build from unmodified Platt's Honeywell A-code source and preserves all text formatting features of the original. Reconstructed sources of Platt's original A-code system are also available at

Play it now

You can play Adv550 right now, either on a cloud server or, if you are using a robust modern browser, on your local machine (1.8 MB).
The local version works well with up-to-date Firefox, Chrome, Safari and MS Edge, though other browsers may not cope and some ad- and popup-blockers block it for some reason. It runs strictly locally, with no further network access – games are saved in your browser's local storage space. You can save the page locally too, and later just point the same browser at the saved html file to continue playing.

Pre-built versions


Game sources

The gzipped tarball adv550a.tgz (83.9 KB) contains the A-code sources of Adv550. Follow this link for an explanation of the process of creating a game executable from its A-code source. Even if you don't need things being explained to you, you may still need to pick up the the C sources of the acdc translator and of the A-code kernel. Both are to be found within this gzipped tarball: acode-12.74.tgz (1.0 MB)

Derived C sources

The gzipped tarball adv550c.tgz (241.6 KB) contains the ANSI C source files and header files, derived by my acdc A-code-to-C translator from the Adv550 A-code source. The basic build is trivial: just compile and link the lot using an ANSI C compiler, and you'll have a fully functional adv550 executable, defaulting to browser display. However, in the console mode (as opposed to the browser one) this executable won't support command history or editing, nor will it be windows-aware. Follow this link if you need instructions for building less "dumb" console executables from the same C source.

To the Adventure downloads page
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Feel free to leave a comment!
Mike Arnautov (04 December 2017)