Quote:
Originally Posted by Retro1234
What's really funny is that's not exactly "garbage", it looks like it's just the bitmap but with its colors garbled. I really don't think this is a safe thing to do, but I would like some confirmation (And of course, understanding what the hell is happening is always interesting too)
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The colours are garbled because the Blitz bitplanes are stored sequentially, so when you've scrolled a screenful, you've scrolled past the first bitplane, and suddenly the pointer for bitplane 0 points at bitplane 1, the one for bpl 1 points at bpl 2, and the last one points beyond the screen, bringing in uninitialised garbage into the top bitplane.