git submodule update --init
- https://github.com/ricardoquesada/vchar64
- http://spritemate.com
- https://github.com/Viza74/c64helperscriptsforaseprite
- http://www.sidmusic.org/goattracker/mac/
- https://sourceforge.net/projects/c64-debugger/files/latest/download
- https://github.com/sunsided/c64-debugger
- https://csdb.dk/release/?id=139826
- http://spritemate.com
- https://twitter.com/awsm9000/status/1054034426554994690