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IRQ question

by Seabreeze / March 24, 2004 12:03 AM PST

During a Direct3D game, often either my game or computer crash. This is a new home built computer using Windows 98SE. The video card (NVidia Geforce FX 5200) manufacturer FAQ said one cause could be If anything else besides the video card is sharing the same IRQ number. It is sharing IRQ 5 with 6 other components. The FAQ said to optimally use IRQ 11. On my system IRQ 11 is shared by 6 components. How do I reassign those IRQ 11 components other numbers and move the video card to IRQ 11? Any suggestions as to where to move or not to move the ones at IRQ 11? Thanks

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Re:IRQ question
by R. Proffitt Forum moderator / March 24, 2004 12:39 AM PST
In reply to: IRQ question

Frankly, I've yet to see futzing with the IRQ cure such an issue. Today it always seem to revolve about motherbaord drivers, the BIOS that is out of date, BIOS defaults, heat, bad ram, parasites, inadequate power supplies and just plain configuration issues.

But its tough to tell a person this, so here's how to turn off IRQ routing in Windows 98 so you can try it.

http://support.microsoft.com/default.aspx?kbid=182628

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And more . .
by Cursorcowboy / March 24, 2004 1:43 AM PST
In reply to: IRQ question

Further reading, [Q182604] explains that Windows provides support for PCI bus IRQ steering which dynamically assign or "steer" PCI bus IRQs to PCI devices. The steering provides the flexibility to reprogram PCI interrupts when rebalancing Plug and Play PCI and ISA resources around non-Plug and Play ISA devices.

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Re:IRQ question
by Yew / March 24, 2004 3:43 AM PST
In reply to: IRQ question

Typically, after the ISA card died out of popular use, IRQ issues ceased being problems. All of that is now handled by the CPU and bus controllers and to a lesser degree, the operating system.

As Bob alluded to, generally speaking the CPU and bus controllers know how to better manage IRQ resources than you do. The major advantage of the PCI bus over ISA was that IRQs could be shared among devices safely. IRQ conflict type entries in a FAQ are often times relics of an age long since past and happily forgotten by most who lived through any part of it. It's rare you find a computer repair guy who waxes nastalgic over IRQs because masochism just isn't that common a trait in people.

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