Upgrade win98/LV4 to win2000/LV6: Speed problems with AT-MIO-16E

I found that in Windows 2000 with Labview 6 the readout rate of our AT-MIO-16E board drops to approx. 2.5 kHz max. (before approx. 11.5 kHz in Windows 98 with Labview 4 ) using the 'AI single scan' VI (see attached scheme for the readout routine). I don't know if this is due to Win2000 or due to the new NI-DAQ drivers, but for our timing-critical application this is unacceptable.
Are there any suggestions about how to accellerate the readout of the AT-MIO-16E board?
With best thanks,
Thomas Schultz
Attachments:
AT-MIO-16E_DAQ_example.bmp ‏161 KB

Hi Thomas,
Here is another idea I can give but will be of limited use in chasing it down.
Make sure the board is using DMA.
DMA is alot faster than CPU based data transfers.
Maybe durring the softeware conversion, the board got installed without DMA enabled.
Just an idea.
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

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