diff --git a/check.sh b/check.sh
new file mode 100755
index 0000000..5322cb6
--- /dev/null
+++ b/check.sh
@@ -0,0 +1,11 @@
+#!/bin/bash
+#
+# licence: GPLv3 or later
+# 
+verilator -Wall -I. --top-module saturn_top -cc \
+    saturn_top.v saturn_serial.v \
+    saturn_bus.v saturn_hp48gx_rom.v \
+    saturn_bus_controller.v saturn_debugger.v \
+    saturn_control_unit.v saturn_inst_decoder.v\
+    saturn_regs_pc_rstk.v saturn_alu_module.v
+