> > i have a ti 89 and i got plusshell > > i installed it on the calculator > > what i dont get is what are the .asm files > > the .h files for > > > That is not a stupid question: I don't even know what is PlusShell. The .ASM and .H files are source files for PlusShell. If you're not a programmer, you generally don't need to worry about them. --David