-/* dummy instruction. Warning: this one is not actually supported by flash */
-{0xff, "__break__", "", 0, 0, 0, OP_RETURN},
+/* dummy instructions. Warning: these are not actually supported by flash */
+{0xfd, "__fallthrough__", "s", 0, 0, 0, OP_INTERNAL},
+{0xfe, "__continue__", "s", 0, 0, 0, OP_RETURN|OP_INTERNAL},
+{0xff, "__break__", "s", 0, 0, 0, OP_RETURN|OP_INTERNAL},