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WhoKnows, posted Sat Feb 06, 2016 12:37 am (11232)

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Yesterday I found out about the Sega Classics Script here:
http://aluigi.altervista.org/bms/sega_classics.bms
and was excited to try it out on my .Pak files.

However I was using the script on the files in this:
http://www.amazon.com/Sega-Genesis-Collection-Gold-Edition-Pc/dp/B004GGO1JA
and unfortunately the resulting bin files were unusable with improper names, most likely because I think it's is a slightly different format compared to the downloadable versions on STEAM and DotEmu, although the pak files still start with "PSCD" when viewed with a Hex Editor. As a test I used the script on the one downloadable Sega classic game I had and it worked just fine producing a properly named file.

Could anyone provide some help on adapting the script to work with Gold edition(which is on DVD) since I think it may just be compressed/encypted with an older software that needs different keys. I don't know what information to provide to start with so any help would be appreciated.

aluigi, posted Sat Feb 06, 2016 1:01 am (11234)

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If you can provide a sample file, I will take a look at it.

WhoKnows, posted Sat Feb 06, 2016 1:20 am (11236)

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This is my sample from the DVD Gold Collection but its technically the full Rom(but encrypted). But its the same Rom as the one I have from DotEMU which I got for free at the time I got it which I guess I could also provide if needed. Extracted it should ideally be Space Harrier II

aluigi, posted Sat Feb 06, 2016 9:55 am (11240)

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Can you upload also the executable?
Apparently the encryption (or the key) is different, just that.

WhoKnows, posted Sat Feb 06, 2016 4:59 pm (11253)

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I can get you more files, one being called Sega.x64 and the other Sega.x86. But the other EXE SegaClassics.exe is too big to upload but a NO DVD version can be downloaded(There is only 1 that I know of but I'm not sure posting links to that page would be allowed.) The last exe is uninstall and shouldn't be needed.

Gold Edition.7z

aluigi, posted Sun Feb 07, 2016 12:50 am (11272)

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Exactly as I guessed
set KEY binary "\x6B\x83\xBB\x95\xAB\xAF\xAB\x81\xAB\x6B\xC3\xC7\x2B"

Unfortunately I don't see a difference in the format between Gold and non-Gold (I don't have the files, I just try to remember) so I don't know a reliable way to guess the key.
I guess I will just make a new script.

aluigi, posted Sun Feb 07, 2016 12:53 am (11274)

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http://aluigi.org/bms/sega_classics_gold.bms

WhoKnows, posted Sun Feb 07, 2016 2:11 am (11277)

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The new script worked great. All 46 games extracted perfectly with proper names and worked in an emulator I tested on my mac.

Thank You.

cyanic, posted Sun Feb 28, 2016 11:10 pm (11688)

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I wrote a program to create .pak files, if anyone's interested. See GitHub: https://github.com/GMMan/PscdPack

This version was designed for the Steam version, so it doesn't use gold edition's key. If you want to use it with gold edition, change MainForm.cs:149 from "PscdFormat.ClassicsKeyBytes" to "PscdFormat.ClassicsGoldKeyBytes".