To seebs@plethora.net (Peter Seebach):

What CPU are you running on, and what CPU are you trying to emulate?  I 
recognize Virtual PC as an Intel emulator, running on Power Mac, that can run 
DOS and can run Intel-based OSes such as MS Windows, though you have to buy the 
OS separately except that DOS emulation is already there.  But there is a NetBSD
port that runs natively on PowerPC, so if I were going to run NetBSD or Linux on
a Power Mac, I'd go for the PowerPC port.