Yes it was wrong! I used the 'gameboy programming manual' which was sort of the magnum opus of gameboy documentation at the time that was available to the fan c

Yes it was wrong! I used the 'gameboy programming manual' which was sort of the magnum opus of gameboy documentation at the time that was available to the fan community. I am googling it now, and there are some forum posters saying ' don't use that, it's old and not completely accurate' but it was all that I could find at the time. I'm aware that it's not official documentation, but you have to remember this was over 10 years ago--there might be better resources now.