Legacy odometer & EEPROM calculator for Magneti Marelli dashboards based on Motorola 68HC7xx MCUs. Helps compute/write mileage values and edit raw EEPROM ranges for supported models.
Supported vehicles & MCUs
- Alfa Romeo 156 — Motorola 68HC711KG4 (TQFP100)
- Fiat Brava — Motorola 68HC705Bxx (PLCC52)
- Fiat Marea — Motorola 68HC705E6 (SOIC28)
- Fiat Marea (alt.) — Motorola 68HC711Kxx (TQFP100)
- Lancia Y — Motorola 68HC705E6 (SOIC28)
- Mercedes A-Class — Motorola 68HC711KG2 (TQFP100)
- Renault Megane — Motorola 68HC711Kxx (TQFP100)
Key features
- Mileage calculator (km) with instant HEX pattern generation.
- EEPROM editor with quick ranges: 0000h–0003h, 0004h–004Fh, 0050h–0053h, 0054h–009Fh.
- Direct byte editing for Magneti Marelli clusters.
- Lightweight, portable legacy utility (no install).
How to use (typical workflow)
- Read the cluster EEPROM (via programmer) and save a backup.
- Launch Dashboard Calculator v1.0, enter target value (km).
- Press Calculate → copy generated values into the shown EEPROM ranges.
- Write the edited dump back to EEPROM, power up the cluster and verify.
- If needed, fine-tune bytes and re-write.
Requirements & compatibility
- Windows PC (32/64-bit; runs as legacy/portable tool).
- External EEPROM programmer for read/write operations.
- Intended for Magneti Marelli dashboards listed above.
What’s included
- Dashboard Calculator v1.0 executable.
- On-screen “Supported models” dialog (quick reference).
Notes & legal
- Use only for legitimate purposes: cluster replacement, repair, or calibration after maintenance in accordance with local law. Keep originals of all dumps.
