8086-80286 instruction prefix interrupt bug visualized

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Some CPU bugs are fun to read about; others are fun to witness live on a computer screen. Here's a CPU bug that is hard to debug unless you already know about it.

Calling this a "bug" is a bit of a misnomer; Intel documented the behavior in the datasheet. But they corrected it in later processors, so I'm still calling it a bug.
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Magnificent! Thanks for sharing and for the explanation :)

NixMcRetro
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Thank you
IBM PC 5160 connected to an expansion unit do you mean via ISA slot?

baghdadiabdellatif
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Have you confirmed that in fact Intel has corrected the issue and this does not happen with a 386?

YarisTex
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