does nintendo dsi have a software, wherein you can write something on it? much like a pda? where you can write notes? for example, lectures in my subjects?
I don't think there's an official piece of software that does that, but there are homebrew programs such as DSOrganize or DSNotes. The latter is better for simple touch screen note-taking, but DSOrganize is more PDA-like.
oh sorry.. i'm not familiar with that homebrew and rom stuff.. i'm using r4, so il just have to put it there like what i did in saving a dowloaded rom?
Yes, but read the readme.txt file that usually comes with homebrew in case there are other instructions.