I built the OPL2 sound card over the weekend and it worked perfectly from first power up! Thanks for designing this - it’s going to be lots of fun to play with.
I’ve successfully run and modified the demo assembly language program located in the tests folder. Now I’m going to follow this project - YM3812 Part 1 - Register Basics - Things Made Simple to try to figure out how to convert from his Arduino-oriented C++ to Forth to make the card more accessible from the Planck.
This should keep me busy for many months!
Jonathan, thanks again for all of this!