These VGA Cards have a COPROCESSOR! 

We take a look at some cards that reportedly support the IBM 8514/A standard. These cards have a hardware blitter.
We also take a look at a Paradise CGA card from the mid 80s with Plantronics COLORPLUS support.
8514 Demo Diskette:
mail.lipsia.de/...
Video about Ron Belewski's 8514 Mahjong Solitaite:
• Ron Balewski - Mah Jon...
Images:
IBM VGA Graphics Card - Vlask - CC-By-SA 4.0
MCA Slots - K Reichert - CC-By-SA 3.0
Amiga 500 - Bill Bertram - CC-By-SA 2.5
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Other images used under fair use doctrine (e.g. non-performative work or for educational content)