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