The gzipped tarball adv770a.tgz () contains the A-code sources of Adv770.

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 ().