After getting back to working with FPGAs for a few weeks, I took a first study of the Drumulator processor core to implement it in a Terasic DE2-70 board:
Obviously, shown like this, it is neither very sexy nor impressive. But, thanks to the keyboard with serial link previously made, I was finally able to observe for the first time the operation of the heart of the machine.
More informations here : https://synthlan.blogspot.com/