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Re: Legacy Addresses
- To: Mailing List Recipients <pci-sig-request@znyx.com>
- Subject: Re: Legacy Addresses
- From: "John R Pierce" <pierce@hogranch.com>
- Date: Fri, 17 Jan 1997 14:01:30 -0800
- Resent-Date: Fri, 17 Jan 1997 14:01:30 -0800
- Resent-From: pci-sig-request@znyx.com
- Resent-Message-Id: <"T9BaX3.0.Dl4.RT_to"@dart>
- Resent-Sender: pci-sig-request@znyx.com
> 3C0h to 3DFh. For other classes, such as a Generic 8237 DMA
> controller, the PCI specification doesn't specify which addresses
> are reserved, but I've always assumed that it reserves the
> standard addresses of that part. Am I wrong?
Actually, I don't believe the 8237 DMA controller IS a PCI device... its behind
the ISA bridge, so is a legacy ISA device. Its existance (and fixed resources)
is assumed by any PC bios and operating system. Ditto the floppy, keyboard,
RTC, COM ports, etc. They are all ISA devices and don't even EXIST in PCI
config space.
Far as I know, the only legacy PCI devices in common use are VGA and IDE ports.
I'm probably forgetting something.
-jrp
÷ ÿ