> These days, some processors aren't what you expect.  (Case in point:  Cyrix
> 6x86 are 486-class even though they're Pentium-speed.)

In the "let's get our facts straight" department:

# dmesg
....
NetBSD 1.3.2 (GENERIC) #0: Sun May 24 19:45:48 EDT 1998
    perry@frankenstein.piermont.com:/usr/src/sys/arch/i386/compile/GENERIC
cpu0: family 6 model 0 step 0
cpu0: Cyrix 6x86MX (686-class)

> To be sure about _any_ system, you can look at the boot messages (or do
> "dmesg | more") on a target system and look at the detected processor type.
> It'll tell you whether it's 386-class, 486-class, and so on, and that's
> precisely the option you need in I?86_CPU for that machine.

Indeed it does.

---Alex

-----------
Carl Alexander
------------- MIT (where Alex hangs out):
xela@mit.edu      Course VI (sometime special student)    SIPB (prospective)
                  Mitgaard ("honorary mold")    MITSFS    LSC (night worker)
                  http://www.mit.edu/~xela
------------- Work (where they call me "Carl"):
carl@terc.edu     System Administrator & User Services Manager, TERC
                  http://www.terc.edu