Hi,
Is the PIT not working for some reason in the original setup? (Any time I attempt to run with "-M isapc" I just get an "Unable to unlock ram - bridge not found" error.)
Yep, that should be no problem, with isapc the ram is not locked in the first place.
Oh, and you need a config small enough to fit into 128k, 256k roms don't work for isapc. When you turn off all PCI drivers this should be easy ;)
cheers, Gerd