To use the "GFX/TileMap viewer (F4)" context as reference:
TILEMAP 1/8 @ 120,8 = GFX0 #5A3:6D
The 5A3 is literally a character offset which can be correlated easily in the memory view of VRAM ($e000) but where does the palettes offset of 6D come from?
I've spent hours on this and got nowhere. The source seems to indicated that it's a part of the tile data byte pair ( character offset ), but this simply does not be the case from what I can tell.
Any help would be most gratefully received.