PC Card (PCMCIA) Devices Can Exhibit Interrupt Failures on Windows 2000 and XPPrimary Software: Driver Software>>NI-DAQPrimary Software Version: 7.0 Primary Software Fixed Version: 7.2 Secondary Software: N/A Hardware: Multifunction DAQ (MIO)>>E Series>>DAQCard-6062E, Multifunction DAQ (MIO)>>E Series>>DAQCard-6036E, Multifunction DAQ (MIO)>>E Series>>DAQCard-6023E, GPIB>>Plug-in Controllers>>PCMCIA-GPIB, GPIB>>Plug-in Controllers>>PCMCIA-GPIB+, Multifunction DAQ (MIO)>>E Series>>DAQCard-AI-16E-4, Multifunction DAQ (MIO)>>E Series>>DAQCard-6034E, Multifunction DAQ (MIO)>>E Series>>DAQCard-6035E, Multifunction DAQ (MIO)>>E Series>>DAQCard-6024E, Multifunction DAQ (MIO)>>E Series>>DAQCard-AI-16XE-50, GPIB>>Plug-in Controllers>>PCMCIA-488
Problem: When using a PCMCIA card on my Windows machine, I've noticed that there is a performance decrease in a CardBus-enabled PCMCIA slot or I am getting error: DAQCard not responding to first IRQ level. What does this mean and can I fix it? Solution: This issue should be resolved by installing NI Driver Software released in April of 2004 or later. Examples include NI-DAQ 7.2, NI-CAN 2.2, NI-488.2 2.2, and NI-VISA 3.2. Why does this happen? Some National Instruments PC Card (PCMCIA) devices may exhibit interrupt failures on systems that use the IO-APIC for interrupt handling. You can determine if your system is using an IO-APIC by looking in the Device Manager at View » Resources By Connection » Interrupt Request (IRQ). If you see any interrupt request value larger than 15, then your system is using the IO-APIC and may be impacted by this issue. Multiprocessor-ready (including Hyperthreading capable) systems have an onboard IO-APIC. The IO-APIC must be enabled if multiple processors are in use or if hyperthreading is enabled. Also, many vendors are now following Microsoft's recommendation to include and enable the IO-APIC on single processor systems including laptops. Some vendors provide a BIOS setting to disable the IO-APIC when the system is used in uniprocessor mode, though this may require a BIOS update. Some examples of how this issue may manifest itself:
Example Device Manager snapshot of system impacted by this issue (IO-APIC enabled): Related Links: KnowledgeBase 2DN9MOHR: What Is PCMCIA; What Is CardBus? KnowledgeBase 29KA6NQI: Issues Using National Instruments DAQCards in CardBus-enabled PCMCIA Slots KnowledgeBase 2FSFI7YP: DAQCard Devices Fail to Recognize Through PCMCIA-to-PCI Adapte Attachments:
Report Date: 03/04/2004 Last Updated: 03/17/2008 Document ID: 373FLOA6 |
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