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Koto, posted Tue Sep 01, 2020 3:28 pm (58477)

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Hi,

Sega Ages Vol. 25: Gunstar Heroes: Treasure Box has a lot of artworks and unique information about Gunstar Heroes, Dynamite Headdy and Alien Soldier.

I have been messing around with the ISO and I think all that files (Along with the roms) are located in DATA.CCF.

Unfortunatly, I have no idea about how could I extract all its content. I'd be very grateful if someone could help me with it.

Here is the file: https://mega.nz/file/JR5nkDDZ#BSMAT0wvg ... trmL1rNXZQ

Thanks in advance

aluigi, posted Fri Oct 09, 2020 11:28 pm (59177)

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I update the script just today:
http://aluigi.org/bms/sega_ages_2500.bms

Koto, posted Mon May 10, 2021 6:44 pm (63876)

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aluigi wrote:

I update the script just today:
http://aluigi.org/bms/sega_ages_2500.bms

I have totally forgotten about this, and to my surprise, yesterday I found the script in your site!

Thank you for that , it works flawlessly.

Would you have any idea about how to get the images from .IMA files?

See ya

aluigi, posted Tue May 11, 2021 10:58 am (63889)

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Upload one of these IMA files so we can analyze the content (I doubt it's something easy but who knows).

Koto, posted Tue May 11, 2021 1:01 pm (63891)

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Here it is! Thank you

See ya

aluigi, posted Wed May 12, 2021 9:53 am (63921)

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I guess it's some sort of custom image format containing compressed data, it then contains chunks like IMA, STAT and PALE.

So the first step is the decompression but currently I don't know what's the exact algorithm (no lzss or lzo) and I didn't check the others.

The following is the basic script for decompression that will work when someone will figure out the exact algorithm:

Code:

comtype ??? # didn't check the algorithm!
idstring "SHR\0"
get ZSIZE long
get SIZE long
savepos OFFSET
math ZSIZE - 4
get NAME basename
clog NAME OFFSET ZSIZE SIZE