EMualtor im

tests/test_emulator_lcd.py

@@ -0,0 +1,25 @@
+import unittest
+
+from h8536.emulator import MemoryMap
+from h8536.emulator.peripherals import LCD_E_CLOCK_DATA, LCD_E_CLOCK_STATUS
+
+
+class EmulatorLcdBusTest(unittest.TestCase):
+    def test_status_read_reports_ready_even_after_command_write(self):
+        memory = MemoryMap(b"\x00" * 4)
+        memory.write8(LCD_E_CLOCK_STATUS, 0x80)
+
+        self.assertEqual(memory.read8(LCD_E_CLOCK_STATUS), 0x00)
+
+    def test_data_read_returns_data_latch_defaulting_to_zero(self):
+        memory = MemoryMap(b"\x00" * 4)
+
+        self.assertEqual(memory.read8(LCD_E_CLOCK_DATA), 0x00)
+
+        memory.write8(LCD_E_CLOCK_DATA, 0x41)
+
+        self.assertEqual(memory.read8(LCD_E_CLOCK_DATA), 0x41)
+
+
+if __name__ == "__main__":
+    unittest.main()