You can find the source code on GitHub (I'm considering moving to Codeberg): https://github.com/projf/isle
Includes everything you need for:
* @machdyne Lakritz (Lattice ECP5)
* Digilent Nexys Video (Xilinx XC7)
* Radiona #ULX3S (Lattice ECP5)
* Verilator simulator with SDL (Linux/macOS/Windows)






