3Com Bigpicture Manual page 41

NOTE:
If your PC is loaded with many devices, there may not be a free
interrupt available for the video capture card. If this is the case, you'll need to find
an unused device which has a reserved interrupt and free that interrupt for use by
the capture card. Many PCs reserve an interrupt for a PS/2 mouse or an IDE hard
disk controller, even when these devices are not present on the system. If an
interrupt is reserved for a device that you know is not present on your system,
that interrupt can be reserved for your video capture card.
4. Go into your BIOS and disable the peripheral not being used (i.e., the PS/2 mouse or IDE controller
mentioned in the preceding sidebar).
5. Enter Device Manager, highlight the device, then click the Remove button.
6. Restart Windows 95.
7. Examine the Plug and Play configuration. Your video capture card should be assigned to the IRQ you
requested in the Device Manager.
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