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1 user currently in Super Mario World hacking: |
Acmlm's Board - I2 Archive - Super Mario World hacking - How do I fix a bad checksum... | | | |
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Black Lord Level: 34 Posts: 22/453 EXP: 235639 For next: 18012 Since: 03-15-04 From: Nebraska, what's a Nebraska Since last post: 8 days Last activity: 1 day |
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I was messing with my SMW rom and now it gives me a bad checksum... all I changed was one byte... is there an easy way to fix the bad checksum... well even if it is not so easy... I'd be willing to find out... please... help me out someone... Edit: Nevermind: I just opened it in lunar magic, saved a level and it was fixed... but if someone still wants to tell me the complex way... I'm all ears... (edited by Black Lord on 06-24-04 08:28 AM) |
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Atma X Bandit Level: 43 Posts: 423/801 EXP: 553639 For next: 11407 Since: 03-16-04 From: Derrière vous!!! Since last post: 43 days Last activity: 14 days |
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The only way you could have fixed it manually was to know what address the byte was at, and to change the byte's number back to what it was. | |||
Sendy Shyguy Level: 17 Posts: 42/93 EXP: 21726 For next: 3017 Since: 03-25-04 From: South of UK Since last post: 55 days Last activity: 53 days |
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DAMN! It's such a shame that LM exists because it RUINS all these fun games with hex and checksum and stops the TRUE hackers from flourishing PLUS it means that people who are creative at level design can make hacks which are better than the ASM hackers who are no good at level design, which makes them a bit riled.... HAHAHA! This was a parody post. Move on..... |
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Black Lord Level: 34 Posts: 23/453 EXP: 235639 For next: 18012 Since: 03-15-04 From: Nebraska, what's a Nebraska Since last post: 8 days Last activity: 1 day |
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Originally posted by Atma X Then how does Lunar Magic fix it... because the byte I changed remained the same... I'm tryin to learn some ASM and I wouldn't mind knowing... |
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Imajin Buster Beetle Level: 34 Posts: 354/452 EXP: 234863 For next: 18788 Since: 03-15-04 From: Kingdom of Zeal Since last post: 39 days Last activity: 53 days |
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I think LM actually edits the byte that the sum is being checked against... If that makes sense... | |||
Atma X Bandit Level: 43 Posts: 424/801 EXP: 553639 For next: 11407 Since: 03-16-04 From: Derrière vous!!! Since last post: 43 days Last activity: 14 days |
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Black Lord: LM must do some recoding and probably makes that byte become unused (I'm not certain on that, but that's the only thing I can think of that makes sense). | |||
Juggling Joker Boomerang Brother SMW Hacking Moderator Yeah, JAMH is still being worked on. Level: 48 Posts: 198/1033 EXP: 811447 For next: 12096 Since: 03-15-04 From: Wyoming Since last post: 2 days Last activity: 3 hours |
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No, Lunar Magic recalculates the checksum when you save. It doesn't juggle any bytes or something wacky like that. And really, I don't even see why it matters. I don't even think the real SNES cares about a good checksum, let alone emulators. | |||
Squash Monster New Age Retro Hippie Togateiru Fohku Kohgeki!! GRUNGE no HAMSTER otona bite Peace love and turnpike! Level: 40 Posts: 142/677 EXP: 430507 For next: 10802 Since: 03-15-04 From: Maryland (of the Country Between Canada and Mexico) Since last post: 5 hours Last activity: 5 hours |
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I'm fairly sure the real SNES cares about the checksum, but emulators usually don't (unless it's an odd emulator or you turned an option to check it on). | |||
Juggling Joker Boomerang Brother SMW Hacking Moderator Yeah, JAMH is still being worked on. Level: 48 Posts: 199/1033 EXP: 811447 For next: 12096 Since: 03-15-04 From: Wyoming Since last post: 2 days Last activity: 3 hours |
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The only reason I said that is because I seem to remember someone or another saying something about it, but I may be thinking of a different system now that you mention it. | |||
HyperLamer <||bass> and this was the soloution i thought of that was guarinteed to piss off the greatest amount of people Sesshomaru Tamaranian Level: 118 Posts: 1136/8210 EXP: 18171887 For next: 211027 Since: 03-15-04 From: Canada, w00t! LOL FAD Since last post: 2 hours Last activity: 2 hours |
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No emulator I've ever used cared about the checksum. All LM does is re-calculate it and write the new one back into the ROM. | |||
Black Lord Level: 34 Posts: 24/453 EXP: 235639 For next: 18012 Since: 03-15-04 From: Nebraska, what's a Nebraska Since last post: 8 days Last activity: 1 day |
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Well I was wondering... how I could recalculate the checksum and do it myself... cause unlike some people I like to learn some stuff... and how to do stuff on my own... |
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