assemble lauguage for nios2

I also want to ask the next question?

the r(26) gp 'function?

it is the program counter ?

thanks!

The exception handler is written in assembly, as is crt0.S. However, it's probably best to start with C code and have the compiler generate the assembly for you. You can do this with the "-S" switch. Just Google for details of how to do this, there are many examples on the internet.

Regarding your second question, I think it should be apparent which registers are which by debugging a simple program and glancing at the contents of the registers tab.

- slacker