The bochs cpu emulator (tries to emulate Pentium cpus) oopses in 
finalize_mtrr_state():

mtrr_if is NULL, and thus use_intel() crashes.

Patch attached. I've modified is_cpu() as well, without checking if this 
macro could be used if mtrr_if is not initialized.

Partially tested - bochs now hangs at the first access to the ide 
interface :-(
--
	Manfred