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+#!/bin/bash
+
+# iverlog simulation
+echo "Doing Verilog simulation with iverilog"
+iverilog -o dsn counter.v counter_tb.v
+./dsn -lxt2
+gtkwave counter_tb.vcd &
+
+# yosys synthesis
+set -ex
+
+../../yosys counter_digital.ys
+
+# requires ngspice with xspice support enabled:
+ngspice testbench_digital.sp