Solved

Changing NT 4.0 IRQ settings

Posted on 1997-06-29
4
461 Views
Last Modified: 2013-12-28
I am using a Pentium Pro 200 that apparently is using IRQ 11 even though how it is being used is not indicated in the NT Diagnostics Resources.  I have an Adaptec 1520 SCSI adapter for a Seagate SCSI tape drive that has IRQ settings 9-12 on the adapter.  I tried IRQ 9 and 11 on the adapter and both times Event Viewer indicated an IRQ conflict with IRQ11 on SCSI device 2.

I have gone to the registery under HKey_Local_Machine changed the IRQ setting for device 2 to IRQ 9 and rebooted.  Each time it automatically changes back to IRQ 11 and Event Viewer indicates an IRQ conflict with IRQ 11.

My question:  What is the proper way to change IRQ settings in NT 4.0.  I think IRQ 9 would resolve the conflict I am experiencing.
0
Comment
Question by:jlvining
  • 2
4 Comments
 

Author Comment

by:jlvining
ID: 1779416
Edited text of question
0
 
LVL 3

Accepted Solution

by:
brauner071697 earned 50 total points
ID: 1779417
Your Problem is in the BIOS of your PC
I think you have a PCI-BIOS, with that you must change the IRQ assignments of your configuration. Disable the IRQ 11 for your PCI SLots (the adaptec ISA card need it under NT).
In NT you can't change the IRQ how you make it in WIN95 in the Hardware Manager. Here in the most case you control it over the BIOS or over the Software from the Harware (ISA cards).
Make sure that the right driver for your adaptec is loaded.
What version of OS you have, if not so try SP3.
0
 

Author Comment

by:jlvining
ID: 1779418
Seems to have technical knowledge but his communications skills are poor.  I think I know what he's trying to tell me, but I'm not really sure.

I tried his suggestion, went to the BIOS, changed the settings and still have a conflict in Event Viewer of NT.
0
 

Expert Comment

by:mhorton
ID: 1779419
Just a comment on IRQs.
IRQ 2 and IRQ 9 are used differently by the hardware system than one might think.
IRQs 9 through 15 are cascaded through IRQ 2.  (By cascaded, I mean that IRQs 9 through 15 are attached to the IRQ 2 pin on the IRQ controller chip; an IRQ 10 appears to be from IRQ 2 to the system.)  
Systems using IRQ 2 for a device remaps the IRQ to IRQ 9.  

Whether this helps, I don't know but it may explain why the IRQs do not appear to work properly.
0

Featured Post

Portable, direct connect server access

The ATEN CV211 connects a laptop directly to any server allowing you instant access to perform data maintenance and local operations, for quick troubleshooting, updating, service and repair.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Today, still in the boom of Apple, PC's and products, nearly 50% of the computer users use Windows as graphical operating systems. If you are among those users who love windows, but are grappling to keep the system's hard drive optimized, then you s…
Possible fixes for Windows 7 and Windows Server 2008 updating problem. Solutions mentioned are from Microsoft themselves. I started a case with them from our Microsoft Silver Partner option to open a case and get direct support from Microsoft. If s…
With the advent of Windows 10, Microsoft is pushing a Get Windows 10 icon into the notification area (system tray) of qualifying computers. There are many reasons for wanting to remove this icon. This two-part Experts Exchange video Micro Tutorial s…
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.

840 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question