HW5 - Generating Simulator Data Files
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We will be using real AVR assembly language for our simulator project. In order
to generate files we can load into our simulators memory, we need to set up the
tools for building those files.

STep 1: Install the AVR tools
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In your virtual machine, you will need to install these tools:

..	code-block:: bash

	$ sudo apt-get install -y gcc-avr iverilog gtkwave

Those last two tools will be needed in future assignments.

Now, download this test file:

    * :download:`sum.S`

Now, use this command to generate a file we could load into a real chip, or
into our simulator:

..  code-block:: bash

    $ avr-gcc -c -mmcu=attiny85 -o sum.o sum.S
    $ avr-gcc -mmcu=attiny85 -nostartfiles -o sum.elf sum.o
    $ avr-objcopy -O ihex -R .eeprom sum.elf sum.hex 

This will produce a ``hex`` file we can use to load the simulator instruction memory

..  note::

    We will teach our ``modular make`` system to run these commands later.