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Children aren't the only ones who have trouble sharing?
Multi-DSP Devices... Because the RX devices utilize a multi-DSP architecture that relies upon the Main processor to control a shared bus, the auxiliary processors may be unable to access the shared bus and memory when transfer rates are high. When they are able to access the bus, the load on the processor can cause cycle usage to exceed 100%, resulting in timing errors or other difficult to detect errors.
So, even though multi-processor devices deliver powerful digital signal processing power it is still important to consider cycle usage during circuit design and to monitor it during the experiment . Users must be aware of this limitation and make sure that the cycle usage on all processors never exceeds 100% during maximum transfer.
See TDT's Online Help for more information on multi-processor circuit design or for information on reducing cycle usage using time slices. The RPvds FAQs also include some helpful information on monitoring and reducing cycle usage.
PC Interface cards... After installing the Gigabit or Optibit PCI card in your computer, there may be a conflict with how the PC communicates with the card and other devices in the system. On some PCs the IRQ number commonly used for these devices is also shared with another device, such as a USB Host Controller.
This could lead to the error messages (such as “System Test Error: Cycle power on system and test again.”) when performing a transfer test in zBUSmon. To determine if this is the problem, check the hardware settings for the PCI card in the Windows Device Manager, locate the “Jungo” card and check the Properties. Under the Resources tab, check the Setting of the Resource Type IRQ (Win XP) or Interrupt Request (Win 2000).
If you experience system problems and find the IRQ number to be the same on another device, then you should move the PI5 or PO5 card to another PCI slot in your machine. You will be required to go through the Windows Found New Hardware Wizard again to assign the card drivers properly. This should change the IRQ setting for the TDT card, eliminating the previous conflict.
Note: The PI5 or PO5 card needs to be installed into a 2.2 compliant (3.3 V) PCI slot, and not in a PCI-X or PCI Express slot.
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