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sethtroisi / cloudygo

Website for MiniGo, Leela-Zero and other Go data
http://cloudygo.com
Apache License 2.0
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Format Question #66

Closed gleporeNARA closed 1 year ago

gleporeNARA commented 1 year ago

I am working to create file format signatures for use in file identifications tools such as DROID and Siegfried. Can you please let me know what format the files on https://pminus1.cloudygo.com/ are? For example, https://pminus1.cloudygo.com/ download/m6918649

They have the initial four bytes of "K9z1", which is a decent enough magic to identify the files, but I like to have some additional information such as file format specifications, etc.

Thanks.

sethtroisi commented 1 year ago

These are save files from Prime95 (see https://www.mersenne.org/download/)

The file format doesn't have a public specification but ostensible it is detailed in https://github.com/sethtroisi/misc-scripts/blob/main/mersenne/status_report/prime95_status.py#L40 where you can see the magic numbers 

>>> struct.pack("I", 0x317a394b)
b'K9z1'
gleporeNARA commented 1 year ago

Thank you, I will add that information and the sample files to my upcoming submission to the PRONOM database of file format signatures.