Talk:Nitrofs

Revision as of 18:44, 26 May 2008

Hellos...

Hi, thanks for viewing and hope you find the file-system driver useful. Have tried best to make the read-only nitro driver possible but here you may help improve it with comments, bugs report, and questions without an account. The main page has been locked due to recent spams. (for now...)

Recent changes and such

Just today heard there was a discussion about nitrofs on gbadev's forums, and found out why i was not able before to use a .nds file with emulators. Both thanks to Wintermutes Thx!!!!!! :DD

After reading the forums found out there was a bug with fseek() and the SEEK_CUR, i am sorry. u_u This was not noticed immediately as I only used SEEK_SET in testing. The problem turned out to be an improper return value in my fseek() function. Guess i should thank noda for pointing this out, and btw, hellos! ^^/

Now, a single .nds file should work equally well with both emulators and flashcards, hopefully... I tried this before in the previous version but did not realize passing -o option to ndstool prevented GBA access. After fixing the Makefile and zeroing the offset used previously for the older style .ds.gba

2008-05-21 - fixed ftell() issues, and re-enabled support for ds.gba files in addition to .nds on emulators (best of both worlds! :PP).. also added stat() support for reading file lengths w/o opening..

2008-05-26 - Added chdir() functionality, lets see how long till someone usurp the insanely simple method...

YAY!!

Why not read from the card directly?

Noticed someone asked about this on another forum. I'll try to explain (based on what i've been told so please correct me if am wrong)...

Original games are encrypted and read over SPI buss from the card which decrypts using hardware. When these games are loaded off flashcards, the flashcard's loader modifies the card/SPI functions which are patched to use flashcard specific functions that emulate normal SPI access to the card's data.

The details of this are foggy, since flashcard companies don't wanna say what they are doing exactly and help competitors. :/ So to make homebrew that uses official SPI style calls would be sort of pointless since the loaders would prolly not pick up on this, not patch them, and thus not work at all.

♥ eris