IRQ sharing ???

[willtech]

I change my O.S. to WinXp professional. Before I was using NT2000. My Faxmodem did'nt share any irq and was faster(really faster) than today. Win xp don't say that my modem isn't in conflict, but it shares irq 9 with other 3 periphericals(lan,video(gforce2-asus),audio and usb)

how can I change the modem irq? I tried alot but winxp don't let me change it.

 

[topscribe]

Your modem should have its own IRQ line and I/O port. Is your BIOS set to configure PnP devices? If so, disable that feature so Windows can configure it. Then remove and reinstall it. The reason for this is that BIOS will not configure legacy systems, so it doesn't know if it is putting a PnP device in the same place as a legacy. Also, some modems have jumpers to force an IRQ, although more and more they are going totally to PnP.

Also, you might check on the manufacturer's web site or in your documentation for a suggested INIT string for your modem and enter it into the "Extra Settings" box in your modem properties. The right INIT string can really speed up a modem under certain circumstances.

 

[dxd]

What type of modem is it?

It is sharing an IRQ because undoubtedly it is a PCI based modem. I don't think it sharing an IRQ will cause it to perform more slowly..if you are referring to its connect/download speeds.

Typically, a PCI modem will use hard resources from the shared PCI resource pool. It, through the driver, then emulates a Com port and associates itself with traditional Com port resources for application support.

If this is a desktop system and the modem is an add-in card..you can try moving it to a different PCI slot to see if it will use a different IRQ. Again if a desktop and supported in the BIOS, you can configure the PCI slots to use different resources.

If your modem is performing poorly, I would suspect a driver issue as opposed to a resource issue....just my guess!

Doug
dxd_2000@yahoo.com

 

[willtech]

Tks all. I will do what you both told me. My modem is a Motorola SM56. I didn't not found any drive for Winxp for SM56.And My bios us setting to Plug-and-play OS.

 

[dilettante]

Sometimes it isn't the driver so much as the all-important AT-command strings contained in the .ini file that comes with the driver.

If XP has installed your modem as some "generic" modem, it may not know how to get the most out of it (activating compression, selecting V.90 mode, etc.).

 

[topscribe]

Dilettante has a point. Now, I'm not all that familiar with XP yet, but in Win98, you can go into Modems from the Control Panel, then to Properties > Connections > Advanced, and enter the INIT string in the "Extra Settings" box. Often, if you go to the web site for the manufacturer of the modem, they will give you the best INIT string for your modem. The command in Extra Settings will override anything else. And that string can make all the difference in the world in the speed of a modem, provided everything else is in order. Perhaps someone listening into this conversation can clarify whether this is also true of XP. Butch

"It's what you learn after you know it all that counts"

 

[Guest_imported]

I installed a PCI USB card and it is sharing the same IRQ as my modem. Will this cause me problems? How do I correct the problem? Thank you!

LMS-Services

 

[coplayjoe]

IRQ sharing is SOP in WinXP.
A General Description of IRQ Sharing in Windows XP (Q314068)

You can change that at setup:
How to Force a Hardware Abstraction Layer During an Upgrade or New Installation of Windows XP (Q299340)

And POSSIBLY after setup:
HAL Options After Windows XP Setup (Q309283)