IOS LLE: optional Broadway hardware window after a WiiConnect24 shutdown reply (StarletOS phase 11 J1)

Co-Authored-By: Claude Opus 5.5 <[email protected]>

docs/StarletOS_Checkpoint.json

@@ -48,8 +48,13 @@
     },
     {
       "path": "Source/Core/Core/HW/WII_IPC.cpp",
-      "sha256": "c3faf948533d494243caa229730dac8a8161144647aad22d219f1b4c9f727030",
-      "bytes": 23116
+      "sha256": "a2244dabdd1c9334a63c8ddd3f09ce3abe22e86198b1fd45b092cd238379a6c0",
+      "bytes": 24790
+    },
+    {
+      "path": "Source/Core/Core/HW/WII_IPC.h",
+      "sha256": "886a0ca83ff839013a170efd5d3bb9e32c2a8ad327ca5a78985da27b58ae7cf9",
+      "bytes": 4770
     },
     {
       "path": "Source/Core/Core/IOS/Starlet/ARMCore.cpp",
@@ -101,6 +106,11 @@
       "sha256": "6d58d81d94b32a647dbc3babea3e943aee307c02d9f1fb8904d8ebaccd22cf05",
       "bytes": 16542
     },
+    {
+      "path": "Source/Core/Core/PowerPC/MMU.cpp",
+      "sha256": "25c302b6cf1365abca38f4bcf88666dc25c5799a93534da1f55ae0a0c18dbb68",
+      "bytes": 85125
+    },
     {
       "path": "Source/Core/DolphinNoGUI/PlatformHeadless.cpp",
       "sha256": "1390cff0a139f0b0a90559e0fda855446d279190827a6c5079718421924f4041",
@@ -198,6 +208,15 @@
         "Source/Core/Core/IOS/Starlet/ARMCore.h",
         "Source/Core/Core/IOS/Starlet/ARMJitX64.cpp"
       ]
+    },
+    {
+      "recordedAt": "2026-10-06",
+      "purpose": "StarletOS Phase 11 proposal J1: with DOLPHIN_IPC_TRACE=1 and DOLPHIN_HW_WINDOW=1, Broadway hardware register accesses (MMU MMIO reads and writes, PC) are logged as HWTRACE from the reply to an IOCTL 0x28 32/32 request until the next IPC request; no inlined MMIO reads while requested",
+      "files": [
+        "Source/Core/Core/HW/WII_IPC.cpp",
+        "Source/Core/Core/HW/WII_IPC.h",
+        "Source/Core/Core/PowerPC/MMU.cpp"
+      ]
     }
   ]
 }

docs/StarletOS_Handoff.md

@@ -233,3 +233,19 @@ creation -106 ("system files corrupted" in the System Menu), in the fork only.
 - The companion's images use, besides these (16 `smlabb`, 4 `smulbb`), only
   `blx`, `clz`, `ldrd`, `strd` among the ARMv5TE additions; those were
   already handled.
+
+## Broadway hardware window after the WiiConnect24 shutdown — 2026-10-06
+
+Companion proposal J1 (approved). With the DSP fix, the companion's System
+Menu under Revolution reaches ES LAUNCH in the fork, while on the console it
+stops right after the WiiConnect24 shutdown reply (IOCTL 0x28), with no IPC
+until then. This lists what Broadway touches in that gap.
+
+- `DOLPHIN_HW_WINDOW=1` (with `DOLPHIN_IPC_TRACE=1`): the IPC trace remembers
+  an IOCTL 0x28 with 32-byte input and output; its reply opens a window, and
+  `MMU::ReadFromHardware`/`WriteToHardware` log each Broadway MMIO access as
+  `HWTRACE R|W address/size value PC` until Broadway's next IPC request (or
+  20000 accesses). `IsOptimizableMMIOAccess` returns 0 while requested, so the
+  JIT inlines no MMIO read. Nothing changes without the variables.
+- `MMU.cpp` and `WII_IPC.h` are now exact integration files (28).
+- 96 Starlet tests passed; both builds rebuilt.