You probably can't do it (easily). When Windows was installed on your machine, the BIOS was probably set for Plug and Play which uses the Advanced Configuration and Power Interface Specification (ACPI). Windows installs a HAL (hardware abstraction layer) based on this configuration. Once a ACPI HAL is installed it is essentially there forever and it will not allow you to manually change the IRQ or I/O RAM addresses. Even if you change the BIOS to non-plug and play, you still can't change those values. The only way you can change them is to physically move a I/O card from one bus slot to another. If for some reason you do not have the ACPI HAL installed, changing the BIOS to non-plug and play can sometime give you the ability to change the IRQs.
Changing the HAL after Windows is installed is STRONGLY DISCOURGED by Microsoft as it can leave a system dead in the water where a Windows re-install is your only recourse. For those who never spent hours finding a free IRQ or a memory segment for the I/O when trying to install a new 16-bit card, you have no real appreciation of how convenient ACPI really is. Sharing an IRQ is not a "death sentence" as long as you don't share with a lot of devices and they are not too I/O intensive. I share the Firewire host bus controller with my video card and I have no problems and my DPCs are less that 150 us max and average in the 50 us range. -Tim -----Original Message----- From: flexradio-boun...@flex-radio.biz [mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Steven O'Neal Sent: Tuesday, June 02, 2009 8:11 PM To: Flex Subject: [SPAM] [Flexradio] How to force IRQ's (Question) I'm tuning up my system in anticipation of the arrivial of my new Flex 3000 and have a question about forcing IRQ's. Seems my Video card and my Firewire card are sharing an IRQ, number 16. When I go into control panel the settings for the firewire card are greyed out, Plug and Pray? Firing up the Flex Firewire driver and running with DPC check enabled, I'm pretty low, but getting a peak of 1724 us after about 5 minutes of run time. Normal is around 6 to low 100's on delay. So question is, anyone know how to force the IRQ of my Firewire up to something like IRQ 18. I have not triied the shutdown and move the card to a different slot, and Bios does not seem to offer any options to tweak. Comments suggestions. _________________________________________________________________ Lauren found her dream laptop. Find the PC that's right for you. http://www.microsoft.com/windows/choosepc/?ocid=ftp_val_wl_290 _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/ _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/
