> I don't know about running a guest operating system designed for a > 370 machine like MVS or DOS/VS. I think you would need SET MACHINE 370.
Very likely. Also keep in mind that most of the 370 mode support in the processors themselves is gone, so SET MACHINE 370 might not work at all. Hercules in a Linux (or OpenSolaris) guest would be the way to go if you really need MVS 3.8 on a z10...8-)
