I have an adapter with 64MB of RAM, and I MmMapIoSpace all of it. It seems
to work for a single adapter but when I attempt to MmMapIoSpace a second
adapter (i.e. another 64MB) the call fails. The call fails initially as I
install the second adapter, but after a re-boot both boards come up - but -
my video mode (totally different driver) down shifts from 600x800 to
640x480.?? I seem to be hitting some kind of virtual limit but having
trouble finding any docs on the subject. Any ideas? Thanks, Rick
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Use the performance tool to look at
Memory: Free System Page Table Entries,
I suspect you are running out of PTE’s. You
can set \Control\Session Manager\Memory Management\SystemPages
in the current control set to adjust the number of PTE’s
Don Burn
Windows 2000 Device Driver and Filesystem consulting
----- Original Message -----
From: “Rick Bowman”
To: “NT Developers Interest List”
Sent: Wednesday, July 11, 2001 11:53 AM
Subject: [ntdev] MmMapIoSpace Limits?
> I have an adapter with 64MB of RAM, and I MmMapIoSpace all of it. It
seems
> to work for a single adapter but when I attempt to MmMapIoSpace a second
> adapter (i.e. another 64MB) the call fails. The call fails initially as I
> install the second adapter, but after a re-boot both boards come up -
but -
> my video mode (totally different driver) down shifts from 600x800 to
> 640x480.?? I seem to be hitting some kind of virtual limit but having
> trouble finding any docs on the subject. Any ideas? Thanks, Rick
>
>
> —
> You are currently subscribed to ntdev as: xxxxx@acm.org
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