Radio Shack 3Com Bigpicture - Manual (Page 42)

T ROUBLESHOOTING AND O NLINE H ELP R ESOURCES
39
IRQ Conflicts: Altering PCI BIOS Settings
Your Bigpicture  package is a PCI-based system. While most PCI-based systems configure themselves
automatically via a Plug and Play compliant chip set and BIOS, there are occasional problems. Some of
these systems require you to configure some or all of the following functions, usually by changing jumpers on
the system board or BIOS setup parameters. (Check your system manual for information on configuring
these functions.)
•
The PCI slot must be configured to support bus-mastering.
•
The PCI slot must be configured to support INTA (PCI Interrupt Class A).
•
The PCI INTA must be assigned to a free IRQ or set to “Auto”.
•
Ideally, the PCI slot should be set to LEVEL Trigger rather than EDGE Trigger.
On some systems, a specific IRQ will be assigned to a PCI slot in your CMOS settings that conflicts with
existing equipment in your system. It’s important to verify that your CMOS settings for PCI do not exhibit
such conflicts if you are having problems installing your video capture card or if Plug and Play has trouble
detecting the card. Not all PCs have PCI slots that support bus-mastering. In such a case, the capture card
will have to be moved to another slot.