The “Double GP Glitch” of Dodonpachi Explained

Backgroud of the bug's infamy and original bug bounty described here[1] with a letter from high scoring Japanese player that details the context here[2].

[1]: http://electricunderground.io/the-top-secret-dodonpachi-scor...

[2]: http://electricunderground.io/letter-from-wtn-to-the-west/