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32MB BAR Limitation with NT?
- To: Mailing List Recipients <pci-sig-request@znyx.com>
- Subject: 32MB BAR Limitation with NT?
- From: Brian Carlson <bcarlson@dnaent.com>
- Date: Thu, 23 Jan 1997 09:20:57 -0600
- Resent-Date: Thu, 23 Jan 1997 09:20:57 -0600
- Resent-From: pci-sig-request@znyx.com
- Resent-Message-Id: <"pmain.0.vX6.nBuvo"@dart>
- Resent-Sender: pci-sig-request@znyx.com
Hello,
Last week Ken Crocker identified an apparent limitation
of a maximum of 32MB of BAR memory space allocation under
Windows NT. We independently verified that when over a
32MB region was requested in the BAR, that NT (3.51 and 4.0) displayed:
"Insufficient system resources exist to complete the
requested service."
I would like to allocate a 256MB region for my application,
but this prevents me from doing it.
Does anyone know what is causing this limitation, is it
documented anywhere, and is there any way around it?
Could it be caused by the PCI BIOS, NT kernal services,
or the PCI bridge?
Any information on this topic would be appreciated.
Thanks,
Brian
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| Brian Carlson | mailto://bcarlson@dnaent.com |
| DNA Enterprises, Inc. | Web : http://www.dnaent.com |
| 269 W. Renner Pkwy. | Tel : (972) 644-3301 x138 |
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Πy