RE: my long and informative post on how the GG works...
hmmm... yes... it was a looong time ago... and my memory probably fails me... off the top of my head.
you have 2 pallettes of 16 colors. (4,4,4 [as gone into exhaustive detail already])
#1 Pallette is your sprite pallette
#2 Pallette is your background pallette
(or the other way around)
1 bank of 256 characters (8x8's) - backgrounds. (and font)
1 bank of 256 characters (8x8's) - ALL your sprites
I'll stand corrected if that's incorrect... but like I said, it was a long time ago.
I've dug this up from the archive... tis genuine GameGear art... so it should have all those limitations mentioned... (haven't got all the character data unfortunatly for the back grounds, but this example may help)
Hope that clears that up!??