🚀 go-pugleaf

This is true for 1.2 software (don't know about 1.3 since I'm using a
different method now): The copper list will not include the sprite color
setup code for ham screens/viewports under ALL conditions.  It may even
work correctly sometimes.  In general, though, HamViewPort sprite color
register setup stuff is ignored.
 
A workable (but not nice! fix) is to write the hardware sprite color16,17
etc registers directly.  This clears up the "bug" but is not "nice"
to the system...anyone could come along and re-change the sprite colors
on you.
 
You are not the only developer who has spent many days tracking this
one down....it IS rather esoteric, though, eh?

Jamie Purdon