Um...

[A.I.]

I'm getting this message when I play some ROMS (eg. Zelda Phantom Hour Glass)with NO$GBA:

Data could not be read. Turn the power off and reinstart the Game Card.

Is this a compatability issue or something so simple?

I am new to NDS emulation.

[Ody]

You have to set the correct save type: FLASH 512 KBytes in Options->Emulation Setup.

Then go to File->Reset. If you intend to play this game later, you can save the setup so that you won't have to do this the following time: go to Options->Save Options.

Acutally, if you plan to play other games with No$gba, in its current state, you have to set manually the save type. Here is for example a list of all game's save type:

http://www.dualscene.net/lists/index.php?listname=Supercard

Note that it uses "bits" while in No$gba, "bytes" are used.

[A.I.]

Thank you for your quick reply and good answer but I'm afraid I have to give up on DS emulation as my computer crashes everytime I open up File. I think I will invest on a real DS. Sometimes you can't improve on the real thing.

[Ody]

You are welcome :)
Too bad that it doesn't really work for your computer but you are right, nothing better than the original :p