Change IRQ assignments

[Guest]

I am not sure how to follow this tech support instruction:

This article will have Bios and Windows settings that will help free up
resourses on non used devices.
Note after going through these steps you may need to "Reset the
Configeration Data"(ECC Data). This will recycle the IRQs and free up the
non used ones that might still being reserved by the motherboard.

BIOS setup on my Micron Millennia TS doesn't explicitly list a reset
configuration. How do I have the computer reassign the IRQ assignments?

There is a Belkin 5-port USB 2 PCI card installed.

The goal is to have the Sound Blaster Audigy 2 ZS on an independent IRQ.

msinfo32 lists my IRQ assignments as:

IRQ 0 System timer OK
IRQ 1 Logitech PS/2 Keyboard OK
IRQ 6 Standard floppy disk controller OK
IRQ 8 System CMOS/real time clock OK
IRQ 9 Microsoft ACPI-Compliant System OK
IRQ 10 Intel(R) 82801BA/BAM SMBus Controller - 2443 OK
IRQ 12 Logitech-compatible Mouse PS/2 OK
IRQ 13 Numeric data processor OK
IRQ 14 Primary IDE Channel OK
IRQ 15 Secondary IDE Channel OK
IRQ 16 RADEON X700 Series OK
IRQ 17 NEC PCI to USB Open Host Controller OK
IRQ 19 Intel(R) 82801BA/BAM USB Universal Host Controller - 2442 OK
IRQ 20 Intel(R) PRO/100 VE Network Connection OK
IRQ 21 Standard Enhanced PCI to USB Host Controller OK
IRQ 21 Creative SB Audigy 2 ZS (WDM) OK
IRQ 22 OHCI Compliant IEEE 1394 Host Controller OK
IRQ 23 NEC PCI to USB Open Host Controller OK
IRQ 23 Intel(R) 82801BA/BAM USB Universal Host Controller - 2444 OK

 

[Brian]

IRQ assignments are managed by device drivers, BIOS and OS configuration.
The only way to manually assign an IRQ to a device on an XP computer running
in ACPI mode(like yours), is to change to a "standard PC HAL". This can be
done through device manager and will revert the pc back to the classic 15
IRQ lines. You still wont be allowed to manage resources in Windows, but you
can force changes through BIOS.

Brian P.
A+, Network+, MCP

 

[Guest]

Not.

I get the impression from the Creative Tech support that moving the PCI
cards to different locations will change the IRQ assignments. Right now the
cards are positioned because of where the external connectors are located.

Is sharing an IRQ with the PCI to USB Host controller an inherently bad
alignment?

Arne

 

[Brian]

Changing slots may get it another IRQ line, but its not up to you. You cant
manually assign or allolcate an IRQ to a certian PCI slot while your OS in
using the ACPI HAL. Windows will just override the settings you have in the
BIOS. If you want Windows to use the IRQ settings you define in BIOS, you
must change your HAL to Standard PC.

IRQ sharing usually works pretty well as long as you dont have to many
devices using the same IRQ. If your having problems with devices on the same
IRQ lines, (in your case, maybe audio dropouts)then yes you may need to
consider updating your device drivers or changing the HAL so you can make
changes.
GL

Brian P.
A+, Network+, MCP

 

[Guest]

I don't remember seeing a section to assign IRQ in BIOS, but it may well be
there.

There are still unused IRQ (2,3,4,11,18). If I shut down, and remove the PCI
card and reboot, will that cause the automatic selection process to reassign
the IRQ?

Thank you,

Arne

 

[G...]

I am not sure how to follow this tech support instruction:

This article will have Bios and Windows settings that will help free up
resourses on non used devices.
Note after going through these steps you may need to "Reset the
Configeration Data"(ECC Data). This will recycle the IRQs and free up the
non used ones that might still being reserved by the motherboard.

BIOS setup on my Micron Millennia TS doesn't explicitly list a reset
configuration. How do I have the computer reassign the IRQ assignments?

There is a Belkin 5-port USB 2 PCI card installed.

The goal is to have the Sound Blaster Audigy 2 ZS on an independent IRQ.

msinfo32 lists my IRQ assignments as:

IRQ 0 System timer OK
IRQ 1 Logitech PS/2 Keyboard OK
IRQ 6 Standard floppy disk controller OK
IRQ 8 System CMOS/real time clock OK
IRQ 9 Microsoft ACPI-Compliant System OK
IRQ 10 Intel(R) 82801BA/BAM SMBus Controller - 2443 OK
IRQ 12 Logitech-compatible Mouse PS/2 OK
IRQ 13 Numeric data processor OK
IRQ 14 Primary IDE Channel OK
IRQ 15 Secondary IDE Channel OK
IRQ 16 RADEON X700 Series OK
IRQ 17 NEC PCI to USB Open Host Controller OK
IRQ 19 Intel(R) 82801BA/BAM USB Universal Host Controller - 2442 OK
IRQ 20 Intel(R) PRO/100 VE Network Connection OK
IRQ 21 Standard Enhanced PCI to USB Host Controller OK
IRQ 21 Creative SB Audigy 2 ZS (WDM) OK
IRQ 22 OHCI Compliant IEEE 1394 Host Controller OK
IRQ 23 NEC PCI to USB Open Host Controller OK
IRQ 23 Intel(R) 82801BA/BAM USB Universal Host Controller - 2444 OK

Read this: http://support.microsoft.com/default.aspx?scid=kb;EN-US;314068

 

[Conor]

The goal is to have the Sound Blaster Audigy 2 ZS on an independent IRQ.

Why? If you're having issues with the Audigy, it's entirely to do with
PCI latency, not the IRQ sharing. Download the PCI Latency Tool and set
it to 64 for the Audigy.

If you really insist on wanting to assign IRQs manually, I can help you
with that but it is a royal PITA.




--
Conor

If Pac-Man affected us as kids, we'd all be running around in darkened
rooms, munching magic pills and listening to repetitive electronic
music.

 

[Conor]

I don't remember seeing a section to assign IRQ in BIOS, but it may well be
there.

There are still unused IRQ (2,3,4,11,18). If I shut down, and remove the PCI
card and reboot, will that cause the automatic selection process to reassign
the IRQ?

Yeah...right up until Windows loads.


--
Conor

If Pac-Man affected us as kids, we'd all be running around in darkened
rooms, munching magic pills and listening to repetitive electronic
music.

 

[Guest]

No thanks,

I am going to try removing the USB II PCI card and/ or Sound Blaster card
moving to another PCI slot and see what happens.

For the most part the sound card in functioning OK, with occassional drop
outs. This problem became an issue when all of the Creative Programs
disappeared from All Programs, even though all of the Sound Blaster files
were present.

If XP Home can sort out the problem by rebooting with a different selection
of PCI slots, that is fine. Otherwise, the system runs well enough.

Thank you,

Arne

 

[Mike Hall \(MS-MVP\)]

Arne

Windows will dynamically assign IRQ's and has no problem with them being
shared.. sometimes, switching slots can get over problems.. best not to use
the slot nearest the AGP video card..

I have found Creative software to be less than perfect, and choose not to
install any of the Creative stuff other than the drivers.. you may like to
see if that works for you too..

 

[Guest]

I found that it is possible to change IRQ assignments in BIOS

Manual selection of IRQ in BIOS:

Slot 3 IRQ11 (empty)
Slot 4 IRQ 7 SB audigy 2
Slot 5 Belkin 5 port USB 2 (not configurable)

Slots 1-4 are empty

With only Slot 4 is set to IRQ 7 the SB was at IRQ 7
when I added IRQ 11 to Slot 3 the following assignments were made:

IRQ 0 System timer OK
IRQ 1 Logitech PS/2 Keyboard OK
IRQ 6 Standard floppy disk controller OK
IRQ 8 System CMOS/real time clock OK
IRQ 9 Microsoft ACPI-Compliant System OK
IRQ 10 Intel(R) 82801BA/BAM SMBus Controller - 2443 OK
IRQ 12 Logitech-compatible Mouse PS/2 OK
IRQ 13 Numeric data processor OK
IRQ 14 Primary IDE Channel OK
IRQ 15 Secondary IDE Channel OK
IRQ 16 RADEON X700 Series OK
IRQ 17 Creative SB Audigy 2 ZS (WDM) OK
IRQ 19 Intel(R) 82801BA/BAM USB Universal Host Controller - 2442 OK
IRQ 20 Intel(R) PRO/100 VE Network Connection OK
IRQ 21 OHCI Compliant IEEE 1394 Host Controller OK
IRQ 21 NEC PCI to USB Open Host Controller OK
IRQ 22 NEC PCI to USB Open Host Controller OK
IRQ 23 Standard Enhanced PCI to USB Host Controller OK
IRQ 23 Intel(R) 82801BA/BAM USB Universal Host Controller - 2444 OK

I had to run the Creative diagnostics to "fix" the set up before the sound
card would work.

All in all, I think the time and effort was worthwhile.

Arne