Question $3$: Parallel Port Programming $(10$ marks$)$

A system based on the Nios II has an output parallel port with a data register and a status register. Bit $6$ is the flag bit in the status register. Both registers in the parallel port interface are word$-$sized. Assume that the assembly$-$language source file already has definitions for symbols OUTPORT$\_$DATA and OUTPORT$\_$STATUS that have associations to $32-$bit addresses for the two interface registers.

Write a modular subroutine SendDataToPort$($list$\_$ptr$,$ n$)$ in Nios II assembly$-$language which accepts a pointer to a list of word$-$sized elements and the number of word$-$sized items in the list. With appropriate code, transfer the n elements of the list to the external device attached to the output port described above.