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Re: PCI I/O space on DEC Alpha machines
- To: Mailing List Recipients <pci-sig-request@znyx.com>
- Subject: Re: PCI I/O space on DEC Alpha machines
- From: richardm@cd.com (Richard Masoner)
- Date: Tue, 27 Aug 1996 09:44:56 -0500 (CDT)
- In-Reply-To: <3222574E.4E1D@pixera.com> from "Mitch Norcross" at Aug 26, 96 07:02:54 pm
- Resent-Date: Tue, 27 Aug 1996 09:44:56 -0500 (CDT)
- Resent-From: pci-sig-request@znyx.com
- Resent-Message-Id: <"tS2592.0.7x._Zm8o"@dart>
- Resent-Sender: pci-sig-request@znyx.com
> > Also what if your
> > PWB ends up in an Alpha, Power PC, etc. These *real*
> > computers don't have IO space and everything ends up
> > in memory space anyways.
> Alpha machines do have I/O space (PCI I/O space, that is),
> they just don't have I/O instructions.
Ditto on PowerPC machines. The only difference between accessing
I/O space and memory space on PCI adapters in a PPC box is OR'ing
a flag in the PCI access routines.
Richard Masoner
‹ Ä ³