The https://github.com/blackjetrock/ghidra-6303 repository your post links to (containing a SLEIGH spec for the HD6303) is no longer available, did you happen to save a local clone that could be re-uploaded somewhere?

Thank you very much for pointing this out! Fortunately I still have the code locally. I'll try to raise another PR to get 6303 support into Ghidra.

I found this: https://github.com/NationalSecurityAgency/ghidra/pull/6314

Thank you for finding this! Depili does great work! In another comment I mentioned that I've been working on the Casio CZ-101, which uses the NEC μPD7810 processor. Depili created a processor spec for the μCOM-87 architecture, which I've continued working on in this PR: https://github.com/NationalSecurityAgency/ghidra/pull/7930

Amazing work. I briefly explored trying to RE a more modern piece of hardware, the Tascam Portastudio DP-24SD, in order to try to fix some well-known bugs and limitations. Your article inspired me to maybe give it another go.

Previously, I managed to decode a firmware update file for the unit, but quickly found out that it uses a special-purpose DSP chip, and I wasn't able to easily find public documentation for its instruction set. So I gave up. Do you have a gut feeling on if REing and hacking this firmware could be done by a dedicated amateur, or is this probably more like professional-level work and I should find something better to do?

Interesting work, thank you. May I ask what you are going to do with it? Do you want to emulate it on a PC, or redesign it to make a VST plugin?

I just wanted to say thank you. This is a great read.

Thank you! I really appreciate it.

Very cool! I have a DX7IIFD with an EEPROM in it. It will be cool to see what I can do with this!