PCM Hammer P12 development

They go by many names, P01, P59, VPW, '0411 etc. Also covering E38 and newer here.
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Re: PCM Hammer P12 development

Postby antus » Wed Sep 21, 2022 1:32 pm

This is the OS segment you need, I dont have a complete file but if you make it line up you should find the flipped bit.
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Re: PCM Hammer P12 development

Postby Sleepy » Wed Sep 21, 2022 2:38 pm

antus wrote:This is the OS segment you need, I dont have a complete file but if you make it line up you should find the flipped bit.


Strange the first 0x18000 Bytes do match then after that my file has what apparently is the speedometer cal.

12597778_Compare.PNG
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12597778.PNG
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Re: PCM Hammer P12 development

Postby antus » Wed Sep 21, 2022 2:54 pm

can you post yours up?
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Re: PCM Hammer P12 development

Postby Sleepy » Wed Sep 21, 2022 3:15 pm

antus wrote:can you post yours up?


Here it is.
12597778_corupt.bin
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Re: PCM Hammer P12 development

Postby antus » Wed Sep 21, 2022 3:58 pm

It looks like the OS segment is split, part at the start of the file, part after the calibration segments etc. Apply a 163840 byte offset (decimal) to verify the second part. This aligns the SPS bin with the end of your file and the data then matches from the point you have highlighted to the end. Your bit flip is at 45D9F in your file which is F9 in the corrupt file and its F8 in the factory file.
Have you read the FAQ? For lots of information and links to significant threads see here: viewtopic.php?f=7&t=1396

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Re: PCM Hammer P12 development

Postby Sleepy » Fri Sep 23, 2022 11:42 am

Thank you so much. I have some questions about reversing the OS now, but I will find a better thread.

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