8086-80286 instruction prefix interrupt bug visualized
Channel: The Oldskool PC
Date: 2016-02-28

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.