Adaptec 29320A-R User Guide - Page 156

Troubleshooting in Windows General Troubleshooting The following procedures can be used for troubleshooting in all the Windows operating systems. For troubleshooting specifically in Windows NT 4.0, see Troubleshooting in Windows NT 4.0 on page A-5. What if I can't load the driver and suspect that it is an IRQ conflict? The PCI specification allows the motherboard manufacturer to determine the IRQ assignment for each PCI device. Check with the motherboard/computer manufacturer for the specific PCI configuration details of your system. These are some basic steps that can assist the motherboard in correctly allocating resources to your PCI devices and/or resolve existing IRQ conflicts: 1 Move the PCI SCSI card to a PCI slot that is not forced to share an IRQ with any other PCI, AGP, or ISA slot. These are usually the PCI slots in the middle of the PCI expansion. You will need to check with the motherboard/computer manufacturer for the specific PCI configuration details of your system. 2 Check with your video card/display adapter manufacturer to see if your specific video card requires an IRQ allocation. Most motherboard CMOS/BIOS setup utilities have an option to disable the allocation of an IRQ to the AGP slot. Disable this option only if you have verified that your video card does not require an IRQ. 3 Verify that all IRQs not specifically required for ISA devices are set to Available or PNP ISA/PCI in the motherboard CMOS/BIOS setup utility. 4 Verify that all devices not being used are disabled so that the resources they are being allocated can be freed up for allocation to another device. This is accomplished through the motherboard CMOS/BIOS setup utility. For example, if you are not using the onboard COM/Serial port on your motherboard, you can usually disable this chipset and free up the IRQ it is currently being assigned. A-3