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| Acmlm's Board - I2 Archive - - Posts by labmaster |
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labmaster Blue Octorok Level: 12 Posts: 21/43 EXP: 6135 For next: 1786 Since: 07-17-04 From: New Zealand! Since last post: 10 days Last activity: 2 min. |
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| To edit ASM instructions in a ROM? Sure, it'll give the 'right numbers', but unless you have a clue as to what the numbers mean, it's useless. That's where a disassembler handy - once you've found what you want to change, and know what you want to change it to, it can be done via a hexeditor. Just make sure that its endianess doesn't catch you out. | |||
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labmaster Blue Octorok Level: 12 Posts: 22/43 EXP: 6135 For next: 1786 Since: 07-17-04 From: New Zealand! Since last post: 10 days Last activity: 2 min. |
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| I can tell you where the data is - Kawa probably can as well. In FireRed, the actual encounter data starts at 083c73a0. This is referenced by a block of pointers starting at 083c9cb0. The problem (for me, at least) is knowing what data matches which areas. The index to the pointer to the encounter data is created in a most inefficient manner - a loop in the function at 08082934, which I haven't got around to reversing yet. However, you can still find the addresses manually for the area you are currently in. In VBA-SDL, place a break on thumb at 08082b4a. The word in r00 is a pointer to the start of the encounter data for the area you're in (for e.g., Route 01 data is at 083C8E60). The format of the data itself is pretty simple to understand - it's just the min/max level of the Pokemon followed by an identifier for the Pokemon species itself. |
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labmaster Blue Octorok Level: 12 Posts: 23/43 EXP: 6135 For next: 1786 Since: 07-17-04 From: New Zealand! Since last post: 10 days Last activity: 2 min. |
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| Which version of VBA do you have? No problems on a slightly modified version of 1.7.2 for me. | |||
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labmaster Blue Octorok Level: 12 Posts: 24/43 EXP: 6135 For next: 1786 Since: 07-17-04 From: New Zealand! Since last post: 10 days Last activity: 2 min. |
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| There's some good OS development-related newsgroups out there - might be worth checking them out. | |||
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labmaster Blue Octorok Level: 12 Posts: 25/43 EXP: 6135 For next: 1786 Since: 07-17-04 From: New Zealand! Since last post: 10 days Last activity: 2 min. |
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| It probably edits actual savegames (or 'battery' files) rather than an emulators' savestate - they usually have a .sav extension. | |||
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labmaster Blue Octorok Level: 12 Posts: 26/43 EXP: 6135 For next: 1786 Since: 07-17-04 From: New Zealand! Since last post: 10 days Last activity: 2 min. |
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| I would advise that you avoid the use of superlatives... they can come back and bite you in the bum. | |||
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labmaster Blue Octorok Level: 12 Posts: 27/43 EXP: 6135 For next: 1786 Since: 07-17-04 From: New Zealand! Since last post: 10 days Last activity: 2 min. |
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| The GIMP is good, but Photoshop is much more feature-rich (though to be fair, I haven't looked at GIMP for over a year, now). | |||
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labmaster Blue Octorok Level: 12 Posts: 28/43 EXP: 6135 For next: 1786 Since: 07-17-04 From: New Zealand! Since last post: 10 days Last activity: 2 min. |
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| http://en.wikipedia.org/wiki/Koopa_Kid | |||
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labmaster Blue Octorok Level: 12 Posts: 29/43 EXP: 6135 For next: 1786 Since: 07-17-04 From: New Zealand! Since last post: 10 days Last activity: 2 min. |
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| You could try using RegMon or FileMon (www.sysinternals.com, I think) to find out what's dropping it. | |||
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labmaster Blue Octorok Level: 12 Posts: 30/43 EXP: 6135 For next: 1786 Since: 07-17-04 From: New Zealand! Since last post: 10 days Last activity: 2 min. |
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| Yep. http://vbalink.wz.cz/ |
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labmaster Blue Octorok Level: 12 Posts: 31/43 EXP: 6135 For next: 1786 Since: 07-17-04 From: New Zealand! Since last post: 10 days Last activity: 2 min. |
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| Try googling "Javascript remote control" - what you're trying to do sounds a bit like that. | |||
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labmaster Blue Octorok Level: 12 Posts: 32/43 EXP: 6135 For next: 1786 Since: 07-17-04 From: New Zealand! Since last post: 10 days Last activity: 2 min. |
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| I'm not familiar with the whole PSX gag, but this is basically what appears to be happening: The picture is comprised of tiles - on most platforms, this is known as 'Text' display modes. PSicture is basically reading in the tiles and displaying them, with a certain number of tiles per row until it skips down to the next row. If the number of tiles per row were the same as in the game, it would appear the same - but it looks like it's a couple of tiles too short. Don't ask me how to fix it, I don't have a clue  |
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labmaster Blue Octorok Level: 12 Posts: 33/43 EXP: 6135 For next: 1786 Since: 07-17-04 From: New Zealand! Since last post: 10 days Last activity: 2 min. |
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| I use a modified version of VBA SDL, which includes a console debugger. If you're used to GUI debugging, it might take a bit of getting used to (and there's virtually no documentation :p), but I don't have any problems with it. Note: none of the public builds include VRAM breakpoint support - so unless graphics are copied via DMA or one of the SWI's (in which case you can catch them via the logger in VBA Developer Version), you'll be out of luck. I've been planning on re-writing it, but I've kinda been waiting for the next version of VBA to be out. The download is hopefully still up, somewhere at http://labmaster.4gigs.com You might still be able to find one of the old (cracked) versions of No$GBA out there, but the compatibility isn't all that great. RascalBoyAdvance allegedly has a debugger, but I haven't figured out how to breakpoints with it (if it can at all). Mappy VM also has a reasonable one, but as it hasn't been worked on for a considerable amount of time, compatibility ain't all that great. |
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labmaster Blue Octorok Level: 12 Posts: 34/43 EXP: 6135 For next: 1786 Since: 07-17-04 From: New Zealand! Since last post: 10 days Last activity: 2 min. |
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| I really can't be bothered getting that dump to take a look - what's the first 4 bytes in the file? If it's not 32 00 00 EA, change it to that. If it is, then you'll have to stick the first kilobyte or so of the ROM into a file and send it to me, or wait for someone else |
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labmaster Blue Octorok Level: 12 Posts: 35/43 EXP: 6135 For next: 1786 Since: 07-17-04 From: New Zealand! Since last post: 10 days Last activity: 2 min. |
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| One word: Breakpoints. I'll leave it to someone who's done some NES work to elaborate. |
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labmaster Blue Octorok Level: 12 Posts: 36/43 EXP: 6135 For next: 1786 Since: 07-17-04 From: New Zealand! Since last post: 10 days Last activity: 2 min. |
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| As far as I know, there isn't one. The closest you'll get is VBA-SDL and VBA-SDL-H - it's console based debugging, so if you're used to GUIs it might be a little strange. SDL-H has a rudimentary opcode logging feature, but if there's something specific you're trying to do, let me know. |
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labmaster Blue Octorok Level: 12 Posts: 37/43 EXP: 6135 For next: 1786 Since: 07-17-04 From: New Zealand! Since last post: 10 days Last activity: 2 min. |
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| VBA is great for quick tracing, but if you want to get your hands dirty with some real reverse engineering, I'd recommend trying to get a copy of IDA Pro (costs a lot, but free if you know where to look ). It takes a bit of getting used to, but once you know what's what it is extremely powerful. |
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labmaster Blue Octorok Level: 12 Posts: 38/43 EXP: 6135 For next: 1786 Since: 07-17-04 From: New Zealand! Since last post: 10 days Last activity: 2 min. |
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| Which version of No$GBA is it? You may be able to use it's breakpoint to catch what you want. | |||
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labmaster Blue Octorok Level: 12 Posts: 39/43 EXP: 6135 For next: 1786 Since: 07-17-04 From: New Zealand! Since last post: 10 days Last activity: 2 min. |
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| rg_ - MediaWiki has built-in table tags. They take a bit of getting used to, but they're not all that bad: http://meta.wikimedia.org/wiki/Help:Table | |||
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labmaster Blue Octorok Level: 12 Posts: 40/43 EXP: 6135 For next: 1786 Since: 07-17-04 From: New Zealand! Since last post: 10 days Last activity: 2 min. |
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| Might be an idea to use Categories to group the pages - then you can have a link to the Category page in the navbar which would at least make browsing a little more intuitive. |
| Pages: 1 2 3 |
| Acmlm's Board - I2 Archive - - Posts by labmaster |
