To test the processor, we need a set of instructions.

We input these instructions into test.prog file.

Similarly, we need an initial state for the memory block and we input this into test.data file.

In instruction memory.v module, we need to ensure that the lines macro definition equals the number of lines we want to read from the test.prog starting from the first line.

You can compile the modules, execute the vvp script, and see the results directly using the command bash test.sh.

Alternately, you can do this manually:

$ iverilog *.v –o out

This command compiles the modules to generate executable.

$ ./out

This command executes our test program using the 8 bit processor

OUTPUT : the above commands generate two output files, memory.dat and result.dat

Result.dat contains the initial and final states of register block. Memory.dat contains the initial and final states of memory block.