You really haven’t give us a lot of details, so it’s hard to give you a particularly good answer. Main questions: What version of QNX? What kind of signals? What resolution do you need? How fast a sample rate? How long is a “huge delay?” Oh, and where are you? Your location (at least by continent) may have an impact and availability and local support.
Having said all that, I have at least to options for you to look into. The first is Advantech, which does document the register-level interface for their PCI DAQ cards. The seconds is National Instruments, which is of course THE name in DAQ. They have drivers for QNX 6.x. An earlier response to the question of PCI DAQ on QNX here on the forum also mention Measurement Computing, again having to use the register-level interfacer. http://www.openqnx.com/PNphpBB2-viewtopic-t6098-.html A quick Google search for “PCI DAQ QNX” also turned up this guy: http://www.superlogics.com/specpage.asp?Items=5217
I don’t actually know off-hand whether any of them offer DMA as opposed to block transfers, but you can follow up with the vendors to find out.
Finally, dumb question; have you talked to UEI about the problem? They may be able to help.
Hope that helps.
Sage Automation, Inc.