64bit P4 vs mfsBSD

[Quartz]

> can you get a
> dmesg that will advise of the processor attributes?  You're looking for
> "LM," (long mode).  If that is there, it is a 64-bit processor.

Does that work on linux? I can't get a dmesg off bsd until I figure out 
how to boot it. Also, where exactly am I looking? On a different machine 
running FreeBSD the only thing in dmesg I see that looks right is "AMD 
Features=0x20100800<SYSCALL,NX,LM>". Is that the right line?