@User I think Tim is reffering to this : https://github.com/Isotel/mixedsim (ngspice branch : https://sourceforge.net/u/platise/ngspice/ci/master/tree/). It has some limitations (the verilog must be synthetizable ).I've been working on an alternative setup to support non-synthetizable verilog or cocotb but I've been kept busy by other topics - I will be happy to get help 🙂