When you use a different dongle the entire screen is covered in blocks (you can see the actual game behind it).
It seems to apply a tilemap of garbage when the dongle is incorrect, but I am sure the rest of the 2D tilemap data was ok - but my memory is crap..
LA Machine guns is similar - although the dump floating around has a bad dump of IC1, I redump it if it hasn't beenr replaced, let me know and I'll upload it.
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