Simple SEGA Genesis homebrew example.

This demo contains examples of the following:

• [x] A generic Makefile for compilation with gendev (basically just a stripped down version of cave-story-md's Makefile)
• [x] A dud CMakeLists.txt to make autocomplete work in cmake-based IDEs like CLion
• [x] Dynamic allocation of structs
• [x] A scrolling background
• [x] Animated sprites
• [x] XGM background music
• [x] D-pad input
• [x] Initializing a sound sample and playing it, cycling through PCM channels

1. Download andwn's latest gendev build, extract it, and move the toolchains directory into /opt.

# Visit this URL for the latest build: https://github.com/andwn/gendev/releases
wget https://github.com/andwn/gendev/releases/download/2017.01.20/gendev-17.01.tar.bz2
tar xvf gendev-17.01.tar.bz2
sudo mv opt/toolchains /opt

1. Clone this repository and make this demo.

git clone https://github.com/bdero/something-md.git something-md
cd something-md
make

1. (Optional, but recommended) Compile and use BlastEm to run the rom.

hg clone https://www.retrodev.com/repos/blastem
cd blastem
make
./blastem /path/to/something.bin