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Re: how do we write a single byte in the config. registers?
- To: Mailing List Recipients <pci-sig-request@znyx.com>
- Subject: Re: how do we write a single byte in the config. registers?
- From: "John R Pierce" <pierce@scruznet.com>
- Date: Wed, 20 Nov 1996 08:23:36 -0800
- Resent-Date: Wed, 20 Nov 1996 08:23:36 -0800
- Resent-From: pci-sig-request@znyx.com
- Resent-Message-Id: <"uur_u.0.Dj.z4pao"@dart>
- Resent-Sender: pci-sig-request@znyx.com
> Beware of config. method #2. If your host chipset does not support method
> #2, Triton family for example, then the accesses appear on the ISA bus
> and ISA cards can react to the aliases of the config addresses. e.g. C200
> can be seen as x200.
Ah, but isn't the port in question always X0XX? [I don't have my PCI
references handy to recall the details here...] If so, that shouldn't be a
problem, as addresses with 00 in bits 8,9 are reserved for the motherboard and
a PCI motherboard will decode bits 10-15=0 before enabling motherboard IO...
-jrp
/ û