On Wed, 27 Mar 2002, John Foust wrote:
On the other hand, the UCSD P-system for the original
IBM PC
still runs in a command window in Windows 2000. Out of the
box compatibility after almost 20 years!
I once hacked OS/2 to run CP/M in a DOS box. If memory serves, it wasn't
hard to do.
Peace... Sridhar