Subject: Re: Multiple busses of the same kind
To: Todd Vierling <>
From: Jason R Thorpe <>
List: tech-kern
Date: 07/31/2001 15:29:00
On Tue, Jul 31, 2001 at 06:21:22PM -0400, Todd Vierling wrote:

 > : All, well, on almost all platforms *OTHER* than the PC, the ISA bus
 > : is in fact not in 0-1MB of CPU address space.
 > The point was that the origins of the thread referred to an i386 laptop with
 > two pcib's when docked, although I don't believe that it was ever confirmed
 > to have a real ISA bus inside the docking station (...I'd believe so,
 > though).

You have to have multiple PCI domains in order to support this, so on
the PC, the answer is "no".  (On PCs, even multiple PCI->Host bridges
implement only one PCI domain.)

        -- Jason R. Thorpe <>