Re: Problem with 865PE chipset and Dual Channel DDR

On Fri, 30 Dec 2005 10:38:10 -0600, William L. Hartzell wrote:

>> It ran fine on the 865 machine with 1 single 512MB RAM chip.

>> I added a second *identical* 512MB DDR in a dual channel configuration.

>> Now it refuses to boot giving me an error message with the string
>> DOSCALL, indicating it failed there. I also use an older version of SNAP
>> drivers, circa @2001-2.

>> Tried Google NG's and didn't find any relevant results. Machine runs
>> W98SE and Linux fine.

>> Any idea what might be the problem?

> Some versions of DOS & FAT code have problems with more than 512 MB of
> real memory. I assume that your boot partition is not FAT? Anyhow, this

Sorry. Let me clarify that. It runs fine with 1GB memory in everything
including real DOS, Linux, W98SE.

It's when you set the RAM sticks in the Dual Channel configuration. On
my mobo w/4 DDR slots for RAM, dual channel is enabled when you use
two identical RAM sticks in Slot 1 & 3, Slot 2 & 4, or all 4 slots. If
you put them in Slot 1 & 2 then you get one GB memory, but not the dual
channel enhancement

I saw on the splash screen - 14091, internalrevision
ver returns 4.50

> that was long before DDR memory shipped. My only suggestion is to run
> memtest upon the new 1 GB memory configuration to see if the new
> memory module is truly compatible with the old. If memtest86

No the memory is fine. They are *identical*, same model and serial
number bought at the same time. If they are not identical on boot it
will not report "Dual Channel Enabled".

Like I said, runs fine with 1GB as long as it's not in a Dual Channel
setup as outlined above.
.

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