Gameboy/ Gameboy Color Gameshark code format?

[pidgeon]

Hey guys, does anyone know what the format of the Gameshark codes for Gameboy And Gameboy Color are? Such as which part is the value, which is RAM / ROM address, etc. And do you guys know whether Gameshark operates on ROM or RAM?
-Many thanks!

[xdaniel]

Like 0115D8CF?

01 = ?
15 = byte to be written
D8CF = byteswapped address (thus here it's CFD8)

And it modifies RAM.

[pidgeon]

Ahh yes thank you. That's exactly what I was looking for  .
I don't think I've ever seen it without starting as 01 so that must be some required value I'm guessing.

[FAST6191]

Something you might wish to read if you are heading down the cheat path
http://nocash.emubase.de/pandocs.htm#gamegeniesharkcheats