http://nesdev.com//vrcvi.txt
http://bootgod.dyndns.org:7777/profile.php?id=1784
http://wiki.nesdev.com/w/index.php/Cartridge_connector
http://unagi.osdn.jp/cgi-bin/hiki/hiki.cgi?VRC6
https://twitter.com/xymiem/status/645564110315229184
https://twitter.com/bakuten_do/status/644860521179561985
https://m.blog.naver.com/PostView.nhn?blogId=xsnake&logNo=220553530126&proxyReferer=https%3A%2F%2Fwww.google.com%2F
