On Thu, 22 Nov 2007, Matthias Drochner wrote:
> I can imagine 3 approaches:

You left out:

  d) change "com0 at isa?" to "com* at isa?", ensure that there is no
     "com0 at anything", and leave "com* at acpi?"  unchanged.  Because of
     the order in which autoconfiguration happens, the first ACPI-attached
     com port will be com0; or if there is no ACPI, then the first
     ISA-attached com port will be com0.  Similarly for com[123], lpt[012],
     etc.

     I have been running kernels like this for years.

--apb (Alan Barrett)