ARGH!

[MaHe]

HOW THE HECK DO I FIND THE CORRECT CHECKSUM (NOT CRC32) OF MY NDS ROMS IN ORDER TO USE IT WITH R4 CHEAT EDITOR?!?!?!?!

 

[FrozenOne23]

Dammit, change your topic title, it's fucking up the layout

 

[Little]

Be calm. Breathe. Relax. Look at other peoples cheat files in the R4 section. They have every single game possible in there already.

 

[MaHe]

I can't. I was searching the webz for three hours already and finally broke.
Woe is me. Also, they don't have Picross DS - I don't want to cheat anyways - I just want to change my backlight in-game.

AAGH. :'(

 

[Sinkhead]

Its MD5 methinks. I use this to get the file hashes. It's really good.

- Sam

 

[MaHe]

No, it's 8 character long... :/

 

[MaHe]

Aah, it's a bitwise inverse of CRC16 hash of the .NDS' header. Now how to calculate one?

 

[FAST6191]

GBATek has all the data you want with regard to GBA and DS checksums for header info:
http://nocash.emubase.de/gbatek.htm#biosmiscfunctions
I used to use hex workshop and this was the stuff I had to put into the custom CRC to give the BIOS version of CRC16: