Variant scope and hardware evidence
The XDF collection identifies MSS54HP separately from MSS54. YulCmr’s hardware comparison lists two AM29F400BB devices of 512 KiB each for HP/CSL, versus two AM29F200BB devices of 256 KiB each for MSS54. MSS54 and MSS54HP memory-device comparison.
Record the installed hardware and any conversion history with the software. Keep the CSL software and hardware context explicit; an HP label alone does not identify a particular CSL configuration.
64 KiB partial-file convention
The repository extraction script recognises a 1,048,576-byte HP input and writes the following regions in slave-then-master order. MSS54/MSS54HP partial extraction source.
| Source input offset, inclusive | Bytes | Output partial offset, inclusive | Script label |
|---|---|---|---|
0x88000–0x8FFFF | 32,768 | 0x0000–0x7FFF | Slave |
0x08000–0x0FFFF | 32,768 | 0x8000–0xFFFF | Master |
These are the named script’s file offsets and ordering. Match the actual read format before applying them. The checksum helper documents HP-specific handling; use its HP logic and input requirements rather than the MSS54 32 KiB arrangement. MSS54/MSS54HP checksum documentation.
Inspected software examples
| Source file | Declared software ID | Declared region |
|---|---|---|
| Complete / hw2701 | 211323002701J469 | 64 KiB |
| Basic / hw0401 | 211325000401PD11 | 64 KiB |
Use definition matching before selecting another release. The hw2701 map reference keeps the first example’s offsets separate from the CSL source context.
Shared guidance
Use MSS map interpretation and validation records for common methods. Preserve any observed hardware or software difference here with its original source and the examined ECU/file.
Sources and evidence
Original Tuning Wiki reference notes. Definition data and source-code observations are identified as such; they do not establish runtime behaviour or a tested calibration. Validation suggestions and worked arithmetic are editorial guidance. Sources checked 10 November 2026.
MSS54/MSS54HP: saildot4k, the OpenSource MSS54 Project and credited contributors. Use the original files and retain their individual credits. Hardware/CSL research: YulCmr and the community sources credited by that project.
- MSS54HP hw2701 Complete XDF — commit dd845dd34225.
- MSS54HP CSL hw0401 Basic XDF — commit dd845dd34225.
- MSS54/MSS54HP partial extraction source — commit dd845dd34225.
- MSS54/MSS54HP checksum documentation — commit dd845dd34225.
- MSS54HP/CSL hardware research index — commit 16025e4acec4.
- MSS54 and MSS54HP memory-device comparison — commit 16025e4acec4.