Hexadecimal code guide for black?

[jp01cf01]

I'm kinda new here, so I dunno if I'm posting this in the right place, but I was wondering if someone would be able to make a guide or whatever to that hexadecimal value coorelates to what, and how the syntax works so I can figure out my own action replay codes instead of trying to look them all up, or if there is already something like that, if someone could point me in the right direction. Any help is appreciated