DMA transfer rate for PCI-6602 counter/timer

[Ma 452]

I'm strongly interested in raising the DMA transfer rate between the PCI-6602 counter and computer. At the moment, I've got a Pen-4 2.4GHz operating under Win98. I have to move an 80 Megaword array at an ~5 MHz speed. So far, I've been able to reach just 2 MHz. Would it be possible? What is the battleneck here - the soft- or hardware?

[Steven B]

Hello,
I think the bottleneck you are seeing here is a limitation of the dma transfer capabilities that is dependant on the bus of your PC and not your 6602 card. Here is a link of a knowledgebase that you could try to use to see if that would improve your transfer rates. I still doubt you will be able to achieve approximately 5MHz.

http://ae.natinst.com/operations/ae/public.nsf/fca7838c4500dc10862567a100753500/1b64310fae9007c086256a1d006d9bbf?OpenDocument

Regards,
Steven B.

[Ma 452]

Steven B:

Thanks for your replay. Unfortunately, I can't access the page you recommended ("page not found").

[Steven B]

Hello,
Sorry about that. I put the wrong link in the post. Try this one instead.

http://digital.ni.com/public.nsf/websearch/1B64310FAE9007C086256A1D006D9BBF?OpenDocument

Regards,
Steven Bucher
Application Engineering