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BIOSs don’t allow individual selection of interrupts for ISA, Plug-N-Play, or PCI.)
The interrupt settings can be called “ICU”, “ICU/PCI”, “PCI”, or “PNP depending
on your BIOS version and manufacturer. Do not set this interrupt to “ISA” only or
to “Legacy ISA”. Be sure to Save the settings before exiting the BIOS Setup.
Under some situations, you will find that freeing an interrupt does not solve your
installation difficulties. This could be due to another peripheral device stealing the
interrupt you just provided. Certain full-featured sound cards require three IRQs to
support all their functions. When one becomes available, they take it. This situation
requires that you remove your sound card, free an interrupt, install the modem and
verify its operation, and then reinstall the sound card. This procedure may also work
for sound cards that have lost their sound after the modem has been installed or if the
modem will not install in a system with a sound card.
Proceed to “Installing the Modem”.
Windows NT 4.0
Windows NT installation problems are always due to inadequate preparation. The
following conditions must be meet before attempting to install the modem or it will
not be seen or correctly installed by the system. (See “Do This First” at the beginning
of this manual.)
• You must have the latest Windows NT Service Pack installed.
• There must be two IRQ and two I/O port Addresses available for the modem to
use.
• The installation utility must be copied from the installation CD-ROM to the
default hard drive and extracted.
If you need help on freeing an interrupt or making a COM Port available, see the
Windows 95/98 “Does Not Install” section for a discussion of this topic. The “Spe-
cial Situations” and “Plug-N-Play BIOS” sections also apply to Windows NT 4.0.
See these areas for guidelines. If you are upgrading or removing the drivers, use the
installation utility on the Windows NT installation diskette that came with your PCI
modem. This utility has an option for removing the modem drivers.
If you are not familiar with changing the settings within your system BIOS setup,
you should skip the following system pre-installation procedure and go to “Installing
the Modem.” Refer back to this area only if you have a problem installing the mo-
dem.
Check your system BIOS IRQ assignments and make sure that at least two interrupts
have been assigned to the PCI bus. In your system’s BIOS Setup routine, find the