1 files changed, 18 insertions, 0 deletions
diff --git a/atk16_emu/test/test_opcode_hlt.py b/atk16_emu/test/test_opcode_hlt.py
new file mode 100644
index 0000000..5cae888
--- /dev/null
+++ b/atk16_emu/test/test_opcode_hlt.py
@@ -0,0 +1,18 @@
+from atk16_emu.emu import Machine
+from atk16_emu.test.utils import make_rom
+
+def test_hlt():
+  machine = Machine()
+
+  rom_image = make_rom([0b1111_0000_0000_0000]) # HLT
+  machine.load_rom_image(rom_image)
+  machine.reset()
+  machine.run()
+
+  assert machine.pc.value == 0
+  assert machine.running == True
+
+  machine.step()
+
+  assert machine.pc.value == 1
+  assert machine.running == False