brainless$\_$alu.v$.$ Then, modify the inputs and expected outputs in each so that you perform the

following additional tests:

$1.$ Write a value from data$\_$in to an address in the program$\_$ram. This is an external write

to the RAM. $($brainless$\_$ext$\_$write.v$)$

$2.$ Store a nonzero value from the accumulator to an address in the program$\_$ram. This is

an internal write to the RAM. $($brainless$\_$int$\_$write.v$)$

$3.$ Demonstrate any two additional ALU functions, storing the results in the accumulator.

This may be done with a single simulation. The ALU functions may not be the pass

through or addition functions used in the example program provided in

brainless$\_$stim.v$.($brainless$\_$alu.v$)$