Here's a program for displaying 80-column text on the Color Computer 3 more clearly:
10 WIDTH 80
20 PALETTE 12,48
30 PALETTE 4,0
40 ATTR 4,4
50 POKE &HE047,0
60 CLS
Save to disk, and just run it whenever you need a clean readable 80 columns.
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The above was pulled from the comments section for this video:
In other news, someone's converting Defender arcade to the Color Computer 3: