In article <Pine.NEB.4.63.0711230827500.1071@discovery.invisible.ca>,
Jared D. McNeill <jmcneill@invisible.ca> wrote:
>On Fri, 23 Nov 2007, Christos Zoulas wrote:
>> I agree with Matthias here. I don't think that isa should be mandatory
>> for ACPI to work.
>
>ACPI is used to locate legacy ISA devices. Our ACPI code passes an 
>isa_chipset_tag_t to each one of these device drivers today, which they 
>all use (for isa_intr_establish, isadma).
>
>You will not get away with a kernel that contains com@acpi but no isa0.

Thanks for the explanation. 

christos