The gzipped tarball adv550a.tgz ( 79K) 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-12.32.tgz (195K).