Buffer Overflows on PCI-DAS1602/16

Well I was hoping that moving to a new board would be 
just a matter of getting the new driver and loading it.
Almost but.....

I'm moving from a CB PC104-DAS16jr/16 to a PCI-DAS1602/16.
The PC104 runs happily at 4KHz*16 channels.  The DAS1602
runs good at 1KHz*16 channels but I get buffer overruns at
4KHz*16 channels. This is the hardware FIFO that is over
running.  I've compiled the current CVS (as of noon) and 
I'm using it with a 2.4.17 rtai kernel.  The board is not
sharing interrupts with any other board. The collection
program runs for 5 minutes to an hour before the overflow.
There is little other load on the system. The same collection
code runs with the das16 driver for days.

Any ideas as to where to look next?

John Conner
Empire Digital Instruments
conner_at_EmpireDI.com

Received on 2002-11-20Z23:32:11