80286 Protected Mode Test

[Noel Chiappa]

    > From: Guy Sotomayor

    > the LOADALL instructions including all of it's warts (and its inability
    > to switch back from protected mode)

Good to have that confirmed (for the 286; apparently it works in the 386).

    > the other way to get back to real mode from protected mode is via a
    > triple-fault.

Any insight into why IBM didn't use that, but went with the (allegedly slow)
keyboard hack?

	Noel