Wrong IRQ Problem

Hewlett-packard / P9851a-aba 523n
June 21, 2010 at 20:06:14
Specs: Windows 3.1/MS-DOS 6.22, 300 MHZ AMD K6-2
I bought a baby at computer from a garage sale and and upgraded the mother board to an EP-58MVP3C-M. Note that I currently have the bus speed set to 66 Mhz at a 2X multiplier because I don't have a big enough heat sink or fan. I have installed windows 3.1 on top of MS-DOS 6.22 and am currently attempting to get the sound card to work. It is a Vibra 16S ISA card which is soundblaster compatible. I currently have the port jumper set to port 220. The problem is that it automatically decides its IRQ using the plug and play bios. I think it is setting its IRQ to IRQ 10 but the windows 3.1 soundblaster driver only works for IRQ's 2, 3, 5, and 7. Is there any way to make the card use a different IRQ from IRQ 10.

See More: Wrong IRQ Problem

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#1
June 21, 2010 at 20:10:04
according to MSD.EXE, IRQ 2 is used by the second interupt controller, IRQ 3, 5, and 7 are used by com and lpt ports. I have attempted to disable these but it has had no effect on whether or not the IRQ changes.

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#2
June 21, 2010 at 20:27:12
Try installing the card in a different slot, if possible. Each of the slots on your motherboard may have a default IRQ assignment, which is sometimes difficult to change. Look at the link below for some assistance.

http://www.simulationexams.com/Samp...

Even though this is a hardware question you might be better off posting this in the Windows 3.1 forum. I could move it but will leave it for the time being to see what response you get.

One this that would be helpful is to have a manual for that motherboard. It may show the default IRQ assignment for each slot.

Look at the link below for possible manual.

http://www.epox.com/downloads.asp


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#3
June 21, 2010 at 20:28:02
If necessary you can probably reserve IRQ 5 in cmos/bios setup for a legacy device. That will keep the bios from assigning it elsewhere. Irq 5 is what most application will expect your sound card to be at.

Com ports should be a IRQ 3 and IRQ 4, as I recall standard setup is com1 and com3 at irq4 and com2 and com4 at irq3, although you can usually change that in cmos/bios setup. And at most you'll probably only need one com port so you can disable all the rest and save their irq's., Then set the printer to irq 7.

You're not really green until you're soylent green.


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Related Solutions

#4
June 21, 2010 at 20:30:49
I think moving the card to another slot to get a different IRQ only works for PCI.

You're not really green until you're soylent green.


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#5
June 21, 2010 at 20:36:26
I have tried the different slot now and it didn't change anything. I think Daveincaps is right, that only works for pci.I think I have tried setting irq 5 for a legacy device already without success but I will try again.

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#6
June 21, 2010 at 20:50:28
I missed the mention of the ISA card type. I shouldn't read so fast. That board appears to have 4 PCI and 2 ISA slots.

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#7
June 21, 2010 at 20:50:29
I set IRQ 5 to legacy ISA mode. I also set COM 2 to IRQ 4. Now MSD.EXE reports that IRQ 5 is used by LPT 2. When I tried to disable all of the COM ports and LPT ports, They show up in their original places and MSD.EXE showed them as not detected. actually the board has 3 ISA slots, 4 PCI slots and an AGP slot. The manual for the motherboard is here

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#8
June 21, 2010 at 21:45:49
I doubt you have an LPT2. MSD isn't the best system info program and may report some invalid settings.

You'll also need the dos setup for the card. If you don't have the disk for the card we may be able to set it up manually.

You're not really green until you're soylent green.


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#9
June 21, 2010 at 21:58:20
Does the card have a CT number on it? Might be easier to find setup info for it.

You're not really green until you're soylent green.


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#10
June 22, 2010 at 01:02:24
Yeah, the original creative setup program might play musical IRQ's.

Another possibility...does the card have jumpers that allow you to change IRQ, DMA, or address range settings?

Skip


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#11
June 22, 2010 at 06:28:29
the card is CT 2800. There are only jumpers to set the port, not IRQ or DMA channels. I have already tried to find drivers for the card but they are for windows 95. by the way, I don't have an LPT 2. I don't know why i didn't say so in my other post

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#12
June 22, 2010 at 07:52:37
We assumed you did not have LPT2...few folks do.

For your drivers and SBCD install program, try this file.

http://www.soundcard-drivers.com/dr...

Skip


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#13
June 22, 2010 at 09:09:48
I was going to install the drivers but the readme said I needed CTCM (Creative PnP Configuration Manager) if I had a PnP card. I have found a copy of this and I think this may be what I have needed all along. I am going to install it and see if this finally solves my problem. then regardless of whether or not it fixes it, I will install the drivers.

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#14
June 22, 2010 at 09:31:43
I don't think ISA cards arre PnP.

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#15
June 22, 2010 at 09:49:01
That's generically an ISA sound blaster 16 card. Go here:

http://support.creative.com/Product...

Then go down to 'manual selection' on that page and choose DOS as the os and have it search. It'll turn up several downloads. The second one there--SBBASIC.EXE, the 1.15 mb download--should be the basic files to setup the card.

Then there's a driver update here:

http://support.creative.com/Product...

The first one--SBPUP.EXE. It says it's for the sound blaster pro but it's also for other older cards. You may not need sbpup.exe but it's there if you do. You'd install it after sbbasic.exe.

I downloaded sbpup.exe and ran it. Running it just extracted the files so you should copy it to a separate directory and then run it so all the files are together. It's got a README file that'll tell you what to do. I didn't download SBBASIC.EXE but it may be the same so you should probably copy it to a separate directory and then run it.

You're not really green until you're soylent green.


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#16
June 22, 2010 at 10:13:35
I installed the CTCM but it did not do anything. Once I installed the drivers though it still did not work. Every time windows tried to use the sound card it says that it is always in use. Then I found out that a program with a certain switch, DIAGNOSE /S, will change the irq setting of the sound card depending on the settings of the BLASTER enviroment variable. I reinstalled the drivers this time telling the installer to use IRQ 5. After it was finished I rebooted and the TADA.WAV sound played when windows started. Thank you for all the help OtheHill, DAVEINCAPS, and SkipCox.

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#17
June 22, 2010 at 10:16:02
You're welcome. We're glad you got it going.

You're not really green until you're soylent green.


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#18
June 22, 2010 at 10:59:01
I have to say I don't miss trying to configure all the hardware manually.

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#19
June 22, 2010 at 11:10:24
Me either. I had a lot of fun digging for a sound card that I could make work on a DOS/Win3.11_NT4.0_ W2K P133 triple boot thing I built a couple years ago.

The ISA NIC wasn't easy either and I have a .45LC cartridge with P133 engraved on it sitting on the desk in case it ever comes back.

I'll call it troubleshooting?

Skip


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