IOS LLE: checkpoint NAND conformance and diagnostic tooling

Preserve formatted NAND boot and Wii Remote pairing, add DMA/SRAM conformance tests and a Wii comparison probe. Keep P1 profiling tools and native update A/B evidence; reject the unhelpful targeted SRAM shortcut.

Tools/WiiConformanceProbe/test_compare.py

@@ -0,0 +1,48 @@
+import contextlib
+import io
+import tempfile
+import unittest
+from pathlib import Path
+
+from compare import compare, read_capture
+
+
+def capture(version=58, value=0):
+    return ("schema,1\nrounds,64\nobservations,1\nios_version,%d\nios_revision,6176\n"
+            "seq,test,round,value,extra\n0,open_fs_mode0,0,%d,0\n" % (version, value))
+
+
+class CompareTest(unittest.TestCase):
+    def test_identical_and_first_difference(self):
+        with tempfile.TemporaryDirectory() as directory:
+            wii = Path(directory) / "wii.csv"
+            dolphin = Path(directory) / "dolphin.csv"
+            wii.write_text(capture(), encoding="utf-8")
+            dolphin.write_text(capture(), encoding="utf-8")
+            with contextlib.redirect_stdout(io.StringIO()):
+                self.assertEqual(compare(read_capture(wii), read_capture(dolphin)), 0)
+            dolphin.write_text(capture(value=-6), encoding="utf-8")
+            output = io.StringIO()
+            with contextlib.redirect_stdout(output):
+                self.assertEqual(compare(read_capture(wii), read_capture(dolphin)), 1)
+            self.assertIn("#0", output.getvalue())
+
+    def test_wrong_ios_version_is_incomparable(self):
+        with tempfile.TemporaryDirectory() as directory:
+            wii = Path(directory) / "wii.csv"
+            dolphin = Path(directory) / "dolphin.csv"
+            wii.write_text(capture(), encoding="utf-8")
+            dolphin.write_text(capture(version=80), encoding="utf-8")
+            with contextlib.redirect_stdout(io.StringIO()):
+                self.assertEqual(compare(read_capture(wii), read_capture(dolphin)), 2)
+
+    def test_truncated_capture_is_rejected(self):
+        with tempfile.TemporaryDirectory() as directory:
+            path = Path(directory) / "short.csv"
+            path.write_text(capture().replace("observations,1", "observations,2"), encoding="utf-8")
+            with self.assertRaises(ValueError):
+                read_capture(path)
+
+
+if __name__ == "__main__":
+    unittest.main()