GB modding references

Some modding references

 * LCD ribbon cable map: http://gbdev.gg8.se/forums/viewtopic.php?pid=331
 * GB gets hot and unregulated power: https://chipmusic.org/forums/topic/19592/dmg-gets-hot-around-my-18-prosound-jack/page/2/
 * LSDJ sync options: http://little-scale.blogspot.com/2008/10/sync-options-for-game-boys.html
 * Master clock generator: http://gieskes.nl/master-clock-generator/
 * LSDJ keyboard: http://littlesounddj.wikia.com/wiki/PC_Keyboard_Interface