test-ports:
for i in $(ALL_PORTS); do $(MAKE) inter-port-clean test-port PORT=$$i; done
+# Helper rule for testing the z80 port only
+test-z80:
+ $(MAKE) inter-port-clean clean test-port PORT=z80
+
+test-z80:
# Begin per-port rules
# List of all of the known source test suites.
ALL_TESTS = $(shell find $(TESTS_DIR) -name "*.c")