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1 user currently in Rom Hacking:  hukka |
| Acmlm's Board - I2 Archive - Rom Hacking - data finding techniques |
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elixirnova Red Paratroopa Level: 22  Posts: 55/177 EXP: 56507 For next: 1843 Since: 04-05-04 From: Midgar Since last post: 1 day Last activity: 1 day |
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| hey im trying to map out a rom and corrupting just isnt doing it all for me its an snes rom and i do know how to find ram adresses and find out where they are used in the rom but just wonderin if there was anyone who could give me some tips on finding data | |||
Smallhacker Green Birdo SMW Hacking Moderator Level: 68  Posts: 518/2273 EXP: 2647223 For next: 81577 Since: 03-15-04 From: Söderhamn, Sweden Since last post: 10 hours Last activity: 9 hours |
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| The best way is to learn ASM. | |||
MathOnNapkins Math n' Hacks Level: 67  Posts: 472/2189 EXP: 2495887 For next: 96985 Since: 03-18-04 From: Base Tourian Since last post: 1 hour Last activity: 32 min. |
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| Take Jigglysaint as your God (with uppercase) if you want to learn how to find data. (edited by MathOnNapkins on 09-19-04 05:31 AM) |
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Ok Impala! Buzzy Beetle Level: 31 Posts: 123/383 EXP: 183070 For next: 2293 Since: 03-16-04 From: The Netherlands Since last post: 4 days Last activity: 23 hours |
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| Ok! I have this same problem while making my Mario Kart hack. Some directions on how to find compression offsets for example using ASM (I know how to do it with Sniff for example) would be really helpful.  |
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elixirnova Red Paratroopa Level: 22 Posts: 56/177 EXP: 56507 For next: 1843 Since: 04-05-04 From: Midgar Since last post: 1 day Last activity: 1 day |
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| well so far i know most of the commands.. (lda, sta, stx, and, or...) all that but i dont really know how to trace asm? to find what i want.. should i find a disassembler? *edit i just dl'ded snes9x w/tracer i dunno how to use it?! but im gonna fool around with it* any help would be nice though (edited by elixirnova on 09-19-04 10:19 AM) |
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Imzogelmo Blue Octorok Level: 11  Posts: 7/41 EXP: 5292 For next: 693 Since: 09-22-04 From: (Longview) Starkville, MS, USA Since last post: 15 days Last activity: 1 day |
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Originally posted by elixirnova Now you have the perfect tool, and there are plenty of docs on the subject at Zophar's, so you should be able to figure it out pretty easily. All you need to know is where the data is and what the data is that you're looking at. |
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MathOnNapkins Math n' Hacks Level: 67 Posts: 525/2189 EXP: 2495887 For next: 96985 Since: 03-18-04 From: Base Tourian Since last post: 1 hour Last activity: 32 min. |
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Originally posted by elixirnova I understand that you're learning and that questions come up from time to time, but please devote more time to thinking your problems through and researching them before asking people for help here. That's my take on it anyways. It looks bad when you don't appear to have the initiative to solve your own problems most of the time. Not that you shouldn't ask questions here, just please use more discretion. |
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Euclid Cheep-cheep Level: 23 Posts: 110/193 EXP: 65528 For next: 2195 Since: 03-15-04 From: Australia Since last post: 24 days Last activity: 7 days |
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| knowing those opcodes/address modes will help a lot. Think Tracer = execution path of a program (a rom assembly in this case) As for how to use the tracer, i think anyone could've figured it out in a few minutes. |
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Heian-794 Red Super Koopa Level: 44 Posts: 463/896 EXP: 611014 For next: 271 Since: 06-01-04 From: Kyoto, Japan Since last post: 21 days Last activity: 10 days |
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| I dunno, Euclid; I couldn't make head or tail of what came out of Evil Peer's tracer, and still don't know how to translate ASM codes into stuff that you'll see in a hex editor. And I've already hacked two games successfully! Elixir, one tip I can give you is to open your ROM with both a hex editor and a graphics editor. This way, if you're looking for certain hex values (suppose you're editing a baseball game and want to find player data, and so you start by trying to find some of their numbers in hex) you'll be able to see which sections of the ROM correspond to graphics and whose hex values can thus be eliminated, since they're not "really" numbers. Corrupting is inefficient when you're looking for what might be contained in a single row of numbers -- it's like finding a needle in a haystack! |
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MathOnNapkins Math n' Hacks Level: 67 Posts: 526/2189 EXP: 2495887 For next: 96985 Since: 03-18-04 From: Base Tourian Since last post: 1 hour Last activity: 32 min. |
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Originally posted by Euclid Well um, I couldn't figure out how it worked initially because I was looking at the wrong file. His build used to produce a file called output.txt. Hell it still might but I haven't looked recently. In fact all that was was a log of when tracing started and stopped and a few other things unimportant to someone who's tracing a rom. I PMed him and he told me to look in the folder where the rom was. I felt pretty stupid then. Though, something like output.txt is terribly misleading on a tracer program, you have to admit. |
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Geiger Buster Beetle Level: 34  Posts: 123/460 EXP: 241080 For next: 12571 Since: 03-15-04 From: Indianapolis, IN, USA Since last post: 6 hours Last activity: 6 hours |
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Originally posted by MathOnNapkins That was actually produced by the original code that I hooked into (IOW, I did not write that part). It was basically a log of the stuff printed to screen (the screen output if you will). It should be eliminated in the current version though. ---Evil Peer |
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MathOnNapkins Math n' Hacks Level: 67 Posts: 561/2189 EXP: 2495887 For next: 96985 Since: 03-18-04 From: Base Tourian Since last post: 1 hour Last activity: 32 min. |
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| Oh yeah. I think you told me that and I forgot. Sorry about the mixup. |
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