by congo » Sat Mar 05, 2005 5:44 pm
IRQ's are set from BIOS as the PC boots I think.......... there are BIOS options which control how those IRQ's are allocated but I'm not sure how your's works or how to set the Modem device IRQ from there.
BIOS options are usually either manual or auto IRQ control, I select auto exclusively unless there is a major problem.
Sometimes there is a secondary option in BIOS which allows BIOS detection of new devices each time the PC boots, or, the option disabled, it just remembers the previous configuration and attempts to configure the PC the same as the last boot.
If a new device is added, that "reset configuration data" (or similar) option may need to be enabled in order for the new hardware to be configured properly into the system, whereafter, it may be turned off again as the PC now recognises the new hardware and configures it properly, saving the data for the next boot.
I think if you go into Device Manager and go through the device properties and click the troubleshoot button, you can preset IRQ's from there, which become effective next time you reboot. Care needs to be taken when allocating the IRQ's in this way as you don't want to cause any further conflicts.
From memory, when IRQ's are allocated this way, there is a method of testing within device manager to see if conflicts occur.
Help and support needs to be turned on for this to work in WinXPpro SP2.

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