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knee page discovery

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Aiden
2026-05-26 19:08:15 +10:00
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docs/pt2-protocol.md
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@@ -683,9 +683,14 @@ Newest confirmed behavior:
- `0x0007 = 0x8000/0x0000` blinked CAM POWER in isolation.
- `0x0015 = 0x8000/0x0000` blinked CALL and red tally in isolation.
- Fresh-boot isolation maps `0x0013` to SLAVE, `0x0016` to green tally, and `0x0017` to BARS for the `0x8000/0x0000` value pair.
- Fresh-boot isolation maps `0x0092` to iris AUTO/OFF behavior, and maps both `0x00B9` and `0x0110` to KNEE AUTO behavior.
- A KNEE bit scan keeps the working bit assignment at `0x00B9.15` and `0x0110.15`; no lower-bit KNEE behavior has been reported yet.
- A KNEE precedence test argues against a simple OR: clearing `0x0110` turned KNEE AUTO off even after `0x00B9` had been set. Current best interpretation is that `0x0110.15` is the stronger live KNEE AUTO source, while `0x00B9.15` is related or transient.
- Fresh-boot isolation maps `0x0092` to iris AUTO/OFF behavior, and maps both `0x00B9` and `0x0110` to KNEE-related behavior.
- A ROM trace now explains why the KNEE tests looked non-level-held. `loc_1795` is reached from the panel input lane (`F104 -> F692 -> F6F0.1`) and reads `E000[0x00B9]` plus `E000[0x0110]`.
- The live KNEE value/report gate is `0x00B9.13`, not the earlier bench-only `0x00B9.15` guess.
- `0x0110.15` forces a timed KNEE page/display override (`F732=0x1C03`, `FB02=0x14`), which matches the observed "lights, then clears" behavior.
- On that KNEE LCD page, `0x0110.15` selects `DL`, `0x00B9.15` selects `PRESET`, and both clear selects `AUTO`.
- When `0x00B9.13` is set and `0x0110.15` is clear, the ROM reports/updates selector `0x00BC` from the `F692 - F6B2` panel-input delta. See `docs/pt2-knee-rom-trace.md`.
- The first KNEE ROM probe produced a new bench LCD state with `DTL` on the left and `KNEE` on the right, matching the ROM page-0x1C DETAIL/KNEE neighborhood.
- A follow-up isolation lit the KNEE AUTO lamp in later KNEE windows but did not change the LCD. Current model: KNEE AUTO lamp/status is mostly selector driven, while the DETAIL/KNEE LCD page needs an additional local menu/display condition.
## What Is Still Unknown