im having trouble making nesDS work, please help

[bash2003]

Im having trouble making the nesDS work. i downloaded the nesDS.nds file from the racketboy website. I loaded the file into micro sd card. when i opened up the nintendo ds, and went to the menu, and clicked on the nesDS icon(which has an 8 bit mario on it), after that, nintendo ds froze. i get 2 black screens after i click on the nesDS icon. What am i doing wrong?

[Devezu]

What kind of flash cart do you have? If you have the GBA+NoPass, then you need to pre-patch it with DLDI. If it is the NDS slot kind, then make sure you have the latest release and your cart supports DLDI.

[bash2003]

i have an R4DS. actually the lameboy emulator works , but not nesDS. I dont understand what DLDI is.

[Niode]

Some homebrew on the R4 requires DLDI patching. It doesn't support auto-patching on the fly like a lot of modern cards. http://chishm.drunkencoders.com/DLDI/ There is a list of DLDI patches and patching engines for Linux, OS X and Windows (in CLI or Noob mode 'ahem' I mean GUI).

DLDI stands for Dynamically Linked Device Interface, it's used with libfat to give homebrew developers a simple way of reading/writing data on a FAT formatted memory card inserted into the system. If the homebrew isn't patched for the specific fat system that a certain card uses (not all cards are the same and it allows devs to implement one system of read/write and then have end users patch the homebrew themselves for their specific card rather than the devs creating a version for every single card) the homebrew won't boot, or will freeze when a read/write action is attempted.

I'd advise you to upgrade to a DSTT though since they cost around $10 and they support patching on the fly and SDHC (High Capacity SD cards). Plus they're still being updated and patched for compatibility. The R4 hasn't been patch/updated for 2 years now. It's outdated. If you have bought it in the last 18 months chances are you've got a cheap knock off, which are rumoured to break your DS.