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Jul - Posts by Arctic Circle System
Arctic Circle System
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Since: 06-16-21


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Posted on 10-03-21 08:16:26 PM, in Sega Channel development disc Link
Originally posted by Joe

Originally posted by rabidabid
I'm guessing these "GI" files might be what was actually sent through the service to cut down on loading/transfer times?

I suspect the .GI files were for the General Instrument version and the .SA files were for the Scientific Atlanta version. Both file formats seem to specify load addresses, which makes sense if the data was to be decompressed to a specific location in RAM (e.g. so the same compressed file format can be used for menu data and game ROMs).

There's some other data in the file headers that I haven't figured out at all. Perhaps a disassembly of those two BIOS ROMs would be enlightening...


I was trying to use your tool and noticed that 08HELP95.GI wouldn't work with your decompression tool (located at Sega_Channel_(January_1996_dev_disc)/Sega Channel/P__/SIT/HELPBIN/08HELP95.GI). I also made a pull request to the source code to fix compilation errors in the latest version of gcc (needed to include stddef.h in lzss.c for it to work), though I don't know enough about C or the GI format to diagnose the error that prevents 08HELP95.GI from decompressing. If it helps, here's the output on pastebin: https://pastebin.com/5R4tvzQS ~Chara
Jul - Posts by Arctic Circle System


Rusted Logic

Acmlmboard - commit 47be4dc [2021-08-23]
©2000-2022 Acmlm, Xkeeper, Kaito Sinclaire, et al.

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