library
ghdl -a --work=ourTypes --std=08 ../sources_snake/types.vhd
Sources
ghdl -i --std=08 -fsynopsys ../sources_snake/*.vhd
make
ghdl -m -v --std=08 -fsynopsys -frelaxed testbench
VGA
https://gist.github.com/pvieito/8cdb54a9a03fd36e51c8df6e331a3006 https://www.ericeastwood.com/lab/vga-simulator/