This was mostly a personal project, more academic than anything else. I wanted to work through building several retro-arcade games from the 1980s as a learning process, and Tempest has always been a favorite of mine. RimWalker is my best attempt to recreate the game. I intend to keep everything as true to the original as possible. I even went as far as creating an emulation library for the Atari sound chip, which works great. I did add a couple of voiced effects just for fun. There are no images in this game. EVERYTHING is generated at runtime as vector graphics... even the font.
I created a YouTube channel and added videos to explain how the game and Atari sound chip work. I have also created a PDF that explains how the chip works in detail. This may be the most detailed documentation you can find regarding the Atari sound chip. To date, I have only found a few very brief documents that explain any of it. I would be interested in any other documentation available, as documentation has been my only source to reverse engineer the chip. Any other details would be valuable in improving the emulator and sound library.
I am building a GitHub repo to share the code and the sound chip emulator, dashboard, sound library, and a couple of demo applications that use it. But I have not worked through everything just yet. As soon as I do, I will make that available for anyone who wants to see the code and how I approached it. I will update this post with any new details.
Feel free to post any questions, concerns, or suggestions.