uhryniuk
173f6fa0c4
Reversed the inner map format from l.java (Nc/Lb) and validated it against the stock reference maps: - reconstruct_rom.py: decoded map -> unpack directory -> 384KB flat ROM. In the flat ROM, production (20187) vs aftermarket (20188) differ only 1.4% (vs 96% packed), i.e. real fuel enrichment. - table_map.py + TABLES.md: fe = c.a[Qd*48]; base = (fe[0]&0x2F0)<<12 = 0x50000; table = base + fe[k]. Located 9 tables (main/low-throttle fuel per cylinder, base/idle fuel, ignition by gear x4), 32 RPM rows x 20 throttle cols, with real axes (RPM fe[8], throttle fe[27]) and the AFR curve (fe[2], 128=lambda 1.00). Validated: main-fuel delta is uniformly richer in the aftermarket map. Viewer now has a "Triumph tables" tab: drop a real .hex (or pick two) and it decodes, unpacks, and renders the fuel/ignition tables as heatmaps with real axes, plus an A->B difference view. build_viewer.py embeds the c.a/s.a directory so any map resolves in-browser. Catalogue dropdown: download_maps.py fetches map .hex files into maps_cache/; serve.py serves the viewer over http so the dropdown can fetch them (drag-and-drop still works on file://). Proprietary map binaries (*.hex, *.dec.bin, maps_cache/) are gitignored — code and docs only.
62 lines
2.9 KiB
Markdown
62 lines
2.9 KiB
Markdown
# Keihin SH7054 (Triumph 865 twin, mechanical odo) — table map
|
||
|
||
Reversed from `Nc()`/`Lb()` in `l.java` and validated against the stock reference
|
||
maps. All offsets are in the reconstructed **flat ROM** (0x60000). Compute per map:
|
||
|
||
```
|
||
fe = c.a[Qd*48] # Qd from the s.a directory lookup on the map signature
|
||
base = (fe[0] & 0x2F0) << 12 # = 0x50000 for the 865 twin family
|
||
offset(table) = base + fe[<field>]
|
||
```
|
||
|
||
Main tables are **32 rows (RPM) × 20 cols (throttle), 16-bit big-endian**.
|
||
|
||
## Axes
|
||
|
||
| Axis | fe field | Entries | Values (20187) | Meaning |
|
||
|---|---|---|---|---|
|
||
| RPM (rows) | `fe[8]` | 32 | 0, 500, 900, 1000 … 10000 | engine speed, direct RPM |
|
||
| Throttle (cols) | `fe[27]` | 20 | 0, 10, 20 … 780, 1000 | throttle %, ÷10 (0–100.0%) |
|
||
|
||
## Tables (validated by production 20187 vs aftermarket 20188 diff)
|
||
|
||
| Table | fe | Offset (20187) | Value range | Notes |
|
||
|---|---|---|---|---|
|
||
| Main fuel — cyl 1 | 11 | 0x56990 | 951–10480 | **strong**: 75% diff, smooth VE, aftermarket richer |
|
||
| Main fuel — cyl 2 | 12 | 0x56E90 | 951–10680 | **strong**: 67% diff |
|
||
| Low-throttle fuel — cyl 1 | 15 | 0x55590 | 0–10760 | 70% diff; starts at 0 (closed throttle) |
|
||
| Low-throttle fuel — cyl 2 | 16 | 0x55A90 | 0–10810 | 68% diff; cyl-1 pair |
|
||
| Fuel — base/idle | 9 | 0x55500 | 0–10760 | 61% diff; lower values |
|
||
| Ignition advance — gear 1 | 19 | 0x587D0 | 13–600 | 4 evenly-spaced (0x500) 20×32 tables |
|
||
| Ignition advance — gears 2–5 | 20 | 0x58CD0 | 13–600 | main operating map |
|
||
| Ignition advance — gear 6 | 21 | 0x591D0 | 13–600 | overdrive |
|
||
| Ignition advance — neutral | 22 | 0x596D0 | 60–600 | idle/free-rev |
|
||
|
||
## AFR / target lambda
|
||
|
||
`fe[2]` @ 0x52260 is an interleaved (value, breakpoint) curve where **128 = λ1.00
|
||
(stoich, 14.7 AFR)** — e.g. `… 128, 500, 128, 400, 128, 300 …`. The `128` cells are
|
||
the closed-loop lambda targets; disabling closed loop (O2 delete) lets you set
|
||
these richer. Exact dimensions still being confirmed.
|
||
|
||
## Scaling (confidence varies)
|
||
|
||
- **Fuel** values are VE/fuel-mass in the ECU's internal units (≈ 0–10800). Real
|
||
units (injector µs / VE %) need the ECU's fuel constant; relative changes are
|
||
exact, absolute scaling TBD.
|
||
- **Ignition** 13–600 is advance in an internal unit (candidate: value ÷ 10 = °BTDC,
|
||
giving ~1.3–60°; the low-RPM row 90→14→20 fits a retard-then-advance curve). TBD.
|
||
- **AFR** 128 = λ1.00 is solid (standard Keihin convention).
|
||
|
||
## SAI / O2 / lambda flags
|
||
|
||
Now findable via the localised flat-ROM diff (20187 vs 20188), which isolates small
|
||
single-byte changes (e.g. 0x50C13, 0x534AD, 0x59759) as prime toggle candidates.
|
||
Confirming which is SAI vs O2 needs either bench testing or the finer `Nc` device
|
||
logic — a follow-up.
|
||
|
||
## Status
|
||
|
||
Fuel and ignition table **locations** are validated end-to-end. Remaining: exact
|
||
scaling constants, AFR dimensions, and confirming the individual device flags.
|