Hi Fred,
Sorry, I missunderstood some of what you were asking for the first time.
X Series PCIe devices were designed for the PCIe bus, so the timing and controll ASIC doesn't expose a signal that would indicate when it's interrupting.
If the goal were only to qualify motherboards, and not the DAQ devices, it might be possible to use a PCIe M series device. Since they were origionally designed as PCI devices, the PCIe versions have a bridge chip and there should be a trace between the STC2 and the bridge for the INTA line. That being said, there is no guarantee that we can even get to that signal. It could very possibly be burried on a middle layer of the pcb. But if the goal is only to qualify motherboards, it's not really our area to begin with. If the customer want's to pursue this it will take some effort to track down the routing on the board to even see if this is a viable option.
One thing to mention to the customer is that judging from this they should be able to use MSI with X Series on QNX.
Regards,
Luke Brekke