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   Foone🏳️‍⚧️ (foone@digipres.club)'s status on Saturday, 26-Aug-2023 04:28:44 JST Foone🏳️‍⚧️

   hmm. I need to either start building documentation about which of my 13 current Ghidra installs have which extensions installed, or I need to set up a ghidra build environment and commit to maintaining a One True Ghidra environment with all the extensions

   • Embed this notice
     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Saturday, 26-Aug-2023 04:28:31 JST Foone🏳️‍⚧️

     in reply to

     ahh, fucking MIPS.
     How do you get a full 32bit address into a register?

     MOV EAX,800771DC ?

     NO GET THAT X86 BULLSHIT OUT OF HERE.

     lui v0,0x8007
     addiu v0,v0,0x6e50
     addiu v0,v0,0x404

     that's an address encoding that'll put some hair on your chest!

     MondoBizarrro likes this.
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     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Saturday, 26-Aug-2023 04:28:33 JST Foone🏳️‍⚧️

     in reply to

     it has been zero days since I crashed an emulator

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     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Saturday, 26-Aug-2023 04:28:36 JST Foone🏳️‍⚧️

     in reply to

     why the heck does the PS1 have a "NoFunction" syscall?

     I know about NOPs, by why a NOP syscall?

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     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Saturday, 26-Aug-2023 04:28:37 JST Foone🏳️‍⚧️

     in reply to

     oh I think this game is doing tricksy shit.
     I think it's dynamically loading code out of datafiles and launching them. So the main executable is just the loader and archive-parser

   • Embed this notice
     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Saturday, 26-Aug-2023 04:28:38 JST Foone🏳️‍⚧️

     in reply to

     it was a good idea of them to put all the strings in a datafile instead of the executable! really handy for localization.

     oh, this game was only ever released in japan? huh

   • Embed this notice
     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Saturday, 26-Aug-2023 04:28:39 JST Foone🏳️‍⚧️

     in reply to

     Turns out the text IS in ascii, it's just in a datafile and not the executable.

     so that doesn't help me

   • Embed this notice
     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Saturday, 26-Aug-2023 04:28:40 JST Foone🏳️‍⚧️

     in reply to

     maybe I can write a program to search for full-width characters in common encodings

   • Embed this notice
     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Saturday, 26-Aug-2023 04:28:41 JST Foone🏳️‍⚧️

     in reply to

     because it's not ASCII. ;_;

   • Embed this notice
     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Saturday, 26-Aug-2023 04:28:41 JST Foone🏳️‍⚧️

     in reply to

     it might be full-width latin characters. possibly encoded in shift-jis.

     sadly ghidra doesn't know how to find that

   • Embed this notice
     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Saturday, 26-Aug-2023 04:28:42 JST Foone🏳️‍⚧️

     in reply to

     ugh. I'm gonna have to find the font for this game, not for the usual reasons (death generators), but because I'm trying to find the code powering a specific screen (The character viewer) but the text from it doesn't show up in a strings search.

   • Embed this notice
     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Saturday, 26-Aug-2023 04:28:43 JST Foone🏳️‍⚧️

     in reply to

     (the answer was ghidra 10.2.3 if you even care)

   • Embed this notice
     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Saturday, 26-Aug-2023 04:28:44 JST Foone🏳️‍⚧️

     in reply to

     I keep having the problem of "now which one of these has that PSX loader installed in it?"

   • Embed this notice
     Misty (misty@digipres.club)'s status on Monday, 28-Aug-2023 13:19:17 JST Misty

     in reply to

     @foone “Ootuka" is probably Haruhiko Otsuka, who went on to work at Ganbarion and is credited on the One Piece games. GDRI mentions that Ganbarion was founded by ex-Technosoft people. http://gdri.smspower.org/wiki/index.php/Technosoft

     MondoBizarrro likes this.
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     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Monday, 28-Aug-2023 13:19:18 JST Foone🏳️‍⚧️

     in reply to

     but given the 1996-1998 dates, I'm guessing they made this tool for one of their PS1 games they released in that period, and it later got used by Ganbarion for Azumanga Donjara Daioh and the One Piece games

   • Embed this notice
     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Monday, 28-Aug-2023 13:19:19 JST Foone🏳️‍⚧️

     in reply to

     that's very interesting. Technosoft had nothing to do with this game... they didn't even exist anymore when it came out.

   • Embed this notice
     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Monday, 28-Aug-2023 13:19:20 JST Foone🏳️‍⚧️

     in reply to

     you'd think the programmers of an Azumanga Daioh, of all games, would realize that the eventual reverse engineer hacking their game might be an Osaka, and would not over-complicated it

   • Embed this notice
     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Monday, 28-Aug-2023 13:19:20 JST Foone🏳️‍⚧️

     in reply to

     oh hello. Someone left the output of a tool on the disc!
     Data Pack2 by OOTUKA, Technosoft Co LTD, eh?

   • Embed this notice
     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Monday, 28-Aug-2023 13:19:21 JST Foone🏳️‍⚧️

     in reply to

     you could have just made them all take 4 parameters and just have some of them ignore the 4th parameter but NO we gotta make everything complicated so that foone's little brain can't handle it

   • Embed this notice
     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Monday, 28-Aug-2023 13:19:22 JST Foone🏳️‍⚧️

     in reply to

     okay so the chunk IDs seem to be related to different types of chunk handlers
     chunk IDs 0-31 use a 3-parameter callback, and 32-47 use a 4-parameter callback

   • Embed this notice
     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Monday, 28-Aug-2023 13:19:23 JST Foone🏳️‍⚧️

     in reply to

     partially because the chunk numbers aren't used as-is. They seem to be adjusted at runtime. So like, some chunks are 0-31, but chunks 32 and up get 32 subtracted from them? It's confusing

   • Embed this notice
     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Monday, 28-Aug-2023 13:19:23 JST Foone🏳️‍⚧️

     in reply to

     or... every callback is registered in pairs, and the second callback is at the same number as the first, +16, and in all cases, it's set to NULL?

     WHAT EVEN IS THIS

   • Embed this notice
     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Monday, 28-Aug-2023 13:19:24 JST Foone🏳️‍⚧️

     in reply to

     I can't be sure yet if those two more are overriding existing chunk types, or if they're entirely new ones

   • Embed this notice
     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Monday, 28-Aug-2023 13:19:25 JST Foone🏳️‍⚧️

     in reply to

     however, those are only the ones known at compile time: there's a lookup table for the chunk types, and I know that at least at one point, it registers and unregisters two more.

   • Embed this notice
     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Monday, 28-Aug-2023 13:19:26 JST Foone🏳️‍⚧️

     in reply to

     so I'm trying to figure out the PAC format used inside the APFrs files used by Azumanga Donjyara Daioh and One Piece: Grand Battle! 1/2.

   • Embed this notice
     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Monday, 28-Aug-2023 13:19:26 JST Foone🏳️‍⚧️

     in reply to

     it has at least 11 types of sub-chunks, of which I know SDFC, VH, VB, and SEP are 4 of them.
     The other 7? unknown.

   • Embed this notice
     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Monday, 28-Aug-2023 13:19:27 JST Foone🏳️‍⚧️

     in reply to

     this won't make your program any better but it will absolutely give headaches to the poor reverse engineers trying to figure out your file formats 21 years later

   • Embed this notice
     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Monday, 28-Aug-2023 13:19:28 JST Foone🏳️‍⚧️

     in reply to

     remember when writing code that parses data formats, always make sure it's a complex mess of dynamic callbacks indexed on magic bytes that you do arithmetic on. never just have a big switch table or a bunch of if-thens.

   • Embed this notice
     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Monday, 28-Aug-2023 13:19:29 JST Foone🏳️‍⚧️

     in reply to

     ahh no it's just a confusing loop.
     that address doesn't equal 800771DC, it's 80077254

   • Embed this notice
     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Monday, 28-Aug-2023 13:19:29 JST Foone🏳️‍⚧️

     in reply to

     You gotta love when it turns out a game is just spewing debugging info on the normally invisible serial terminal, so you just need to connect to see it

   • Embed this notice
     Foone🏳️‍⚧️ (foone@digipres.club)'s status on Monday, 28-Aug-2023 13:19:30 JST Foone🏳️‍⚧️

     in reply to

     you may notice the math here doesn't make sense. I agree that it doesn't make sense. but it seems to work. Something is very wrong