HockeyGirl87 Posted July 1, 2007 Report Share Posted July 1, 2007 Okay, so I have a little bit of free time from my main Gens 94 hack I've been working on, so I decided to do a real quick side project with the SNES version of 94, my only problem is that I don't know how to fix the checksum errors in that. So if anyone knows how to do that, could someone please tell me how to? Thanks in advance. Quote Link to comment Share on other sites More sharing options...
halifax Posted July 1, 2007 Report Share Posted July 1, 2007 I think Xstioph has spent the most time lately looking into editing for SNES....he may be able to help. good luck! im dying to see another snes hack. Quote Link to comment Share on other sites More sharing options...
Xstioph Posted July 1, 2007 Report Share Posted July 1, 2007 I haven't looked at it at all, since it doesn't create any problems that I've noticed.. What happens on genesis when the checksum is incorrect? I've been looking at the checksum guide, but haven't tried to "translate" it to SNES since it doesn't seem to matter... I might be wrong. Maybe wboy can shed some light on this. But if you need other info just hit me up on aim or pm me for my msn preferably... Offsets, and stuff like that for team data perhaps... But if you're familiar with the gens hex code, the transition should be much trouble. It's basically the same... Quote Link to comment Share on other sites More sharing options...
Xstioph Posted August 30, 2007 Report Share Posted August 30, 2007 Hay ho... Found a Checksum fixer: http://stealth.romhack.net/Docs/Docs.htm "Ips patcher/Creator and Checksum recalculator" Tried it and it worked nicely. Edit.. Checksum offset is located at 33244 and is 4 bytes. Quote Link to comment Share on other sites More sharing options...
trudatman Posted September 8, 2010 Report Share Posted September 8, 2010 I tried to use the checksum editor, but I couldn't understand it, at all. could this be explained in more detail? I believe this would need to be done in order to create cartridges, so I'd like to learn this, eventually. holler. Quote Link to comment Share on other sites More sharing options...
smozoma Posted September 8, 2010 Report Share Posted September 8, 2010 I tried to use the checksum editor, but I couldn't understand it, at all. could this be explained in more detail? I believe this would need to be done in order to create cartridges, so I'd like to learn this, eventually. holler. when things aren't immediately obvious, experiment say.. click File Quote Link to comment Share on other sites More sharing options...
trudatman Posted September 8, 2010 Report Share Posted September 8, 2010 I experimented with it... but I still couldn't figure out what I was doing. Quote Link to comment Share on other sites More sharing options...
smozoma Posted September 9, 2010 Report Share Posted September 9, 2010 I experimented with it... but I still couldn't figure out what I was doing. what options are under the File menu? Quote Link to comment Share on other sites More sharing options...
trudatman Posted September 9, 2010 Report Share Posted September 9, 2010 (edited) word. not sure what I was doing before, but, yeah. tough to miss, yet somehow I did. Edited September 9, 2010 by trudatman Quote Link to comment Share on other sites More sharing options...
Europia79 Posted January 22, 2022 Report Share Posted January 22, 2022 Load the ROM in snes9x and click File -> Rom Information. For NHL94, it says the header checksum is 9B52 and the header checksum compliment is 64AD. Open it up in a hex editor & search for AD64529B and you'll see that the checksum compliment is at 7FDC & the checksum is right next to it, at 7FDE (however, these offsets will be different if your ROM has the blank header at the beginning of the file that some ROMs do). The checksum compliment equals FFFF minus the checksum value from snes9x ROM info. There are tools out there that can fix the checksum for you, but they don't always work (which is why it's good to know how it's done). For example, there are some 8 MB Final Fantasy hacks that have the checksum artifact in two locations as a result of the rom expansion... So, to fix it, you have to fix it in two different locations. Quote Link to comment Share on other sites More sharing options...
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