2002 OS 12212156 .xdf

[LRT]

I also tried using these, just a VATS change results in an incorrect checksum.

There are 8 segments of code in the PCM, and 8 related Checksums that must be calculated. The 7 calibration segments have straight forward Checksum calculations.

The Operating System (OS) uses a unique Checksum calculation. It sums the entire areas before, and after, the 7 calibration segments (it skips over these), and also excludes the last 16 bit placeholder at the very end. The native Tunerpro Checksum plug-in can't properly calculate the OS Checksum.

There is an LS1 Checksum plug-in available for Tunerpro on the Delcohacking website that will calculate the OS Checksum, but it will only work with 512 Kb PCMs.

Attached below is a link.

https://pcmhacking.net/forums/viewtopic.php?f=3&t=3845