Showing results for January 12, 2011 - The Old New Thing

Jan 12, 2011
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My, what strange NOPs you have!

Raymond Chen
Raymond Chen

While cleaning up my office, I ran across some old documents which reminded me that there are a lot of weird NOP instructions in Windows 95. Certain early versions of the 80386 processor (manufactured prior to 1987) are known as B1 stepping chips. These early versions of the 80386 had some obscure bugs that affected Windows. For example, if...

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