On Thu, Feb 10, 2000 at 08:54:40PM +0000, John Storrs wrote:
> On Thu, 10 Feb 2000, Yuhong wrote:
> >I just want to buy a National Instruments AT-MIO-16E-10 DAQ card for the
> >control of Robot, this card uses ISA bus, so you say I made a mistake to use
> >this kind of cards? Is it better to use PCI devices?
> The PCI cards which NI offers (eg PCI-MIO-16XE-10) will give better real
> time system performance. Just acknowledging a single ISA device interrupt takes
> around 17us on my 100MHz Pentium system, compared with 3us for a PCI device
> interrupt. PCI bus throughput will be substantially higher than ISA. But the
> guidelines I gave are for optimum real time performance, which you may not need.
> The NI AT cards have the advantage that they are well supported with Linux
> drivers.
The AT and PCI cards are identically supported, using the same driver
source. Some of the additional features of the PCI cards are not
supported, especially busmastering DMA, but it works fine without.
DMA support is in the works. But otherwise, the two series of cards
are identical.
> A good place for stuff like this is Claus Schroeter's Linux Lab
> Project at obelix.chemie.fu-berlin.de.
No, the right place to start is ftp://stm.lbl.gov/pub/comedi.
dave...
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