[pnp]

Raymond Chen recently posted about 386 B1 problems. In the end Microsoft decided not to support it. I imagine most early 386 chips just ran 16-bit MS-DOS code.

Raymond's article:

http://blogs.msdn.com/b/oldnewthing/archive/2011/01/12/10114...

[yuhong]

Yes, this inspired this in the first place.