diff --git a/src/emulation.awk b/src/emulation.awk
new file mode 100644
index 0000000..c351d95
--- /dev/null
+++ b/src/emulation.awk
@@ -0,0 +1,19 @@
+BEGIN {
+	FS=","
+	print "#ifndef _EMULATION_H_"
+	print "#define _EMULATION_H_"
+}
+
+/^OP_/{
+	if ($5 != "NULL") {
+		emuls[$5] = $5
+	}
+}
+
+END {
+	for (i in emuls)
+		printf "void %s(rk65c02emu_t *, instruction_t *)\n",i
+
+	print "#endif /* _EMULATION_H_ */"
+}
+