OK, IRQs don't overlap.
What's with the DMA?

Try a different slot for one of them.

I have tried different slots with no avail. I don't believe the DMA is overlapping, but I am not entirely sure how to determine what the SCSI card DMA is assigned to.

https://www.sac.sk/files.php?d=13&l=

Do a ctrl+f on that page for DOS - looks like there's a bunch of diagnostics utilities there. I see something called "DMA Finder" for example.

After further investigation, it appears to be an IO conflict. When the SCSI driver is loaded and I attempt to use the soundblaster diagnose utility (diganose.exe) it fails to find the card at any of the IO addresses. This makes no sense, as the IO address it is searching is 220h, and the SCSI card is set to 190h. I have since tried a different SCSI card, and it does the same thing with it as well.

Also, the SCSI card's presence is not the thing that is causing the conflict. It is the SCSI driver in DOS. When I comment out the driver but leave the card in the computer, it works just fine. I have tried all the DMA settings, all the IO address settings, and all the IRQ settings and the soundblaster somehow conflicts with all of them even though its settings don't overlap with the SCSI card. Does anyone know of another audio card besides the Sounblaster or the Pro Audio Spectrum that is any good? I am pretty much done with soundblasters at this point, and the Pro Audio Spectrum never worked in my 286 machine.

Do you really need the aspi driver?
It is not needed to access the HD.
It only provides the ASPI interface, commonly used back then for CDs and tape drives.
So, if you do not use such, just save yourself the memory and run the computer without the adaptec/aspi drivers.

I'm using a SCSI CD-ROM drive. That's why I have to use the ASPI driver.

I have no idea if this works or has any effect, but can you change the order in which the drivers are loaded and what happens if you do so?

Sune Salminen wrote:

https://www.sac.sk/files.php?d=13&l=

Do a ctrl+f on that page for DOS - looks like there's a bunch of diagnostics utilities there. I see something called "DMA Finder" for example.

Sune! Don't be a stranger 😀

http://download.adaptec.com/pdfs/user_guides/aha1520a_ug.pdf

Looks like the port is 340, now how big is the MPU401 range from 330
Default (it may have been changed) is no DMA... and DMA only supported on OS/2, so check the J5 jumpers

Stiletto wrote:

Sune! Don't be a stranger 😀

😘 🤣 greetings sharpest one!

I visit and read several times a week, I'm sure there is a parallel reality where I'm buried in old PC hardware and post here all the time!
I'm trying to make a living being a musician but I still fix PCs now and then to make a little extra on the side. But nothing that's retro enough for VOGONS.

I should share the legend of my Thinkpad T61 (2008) here in detail some day. This thing survived a furious ex-wife dropping it on the floor, a $26 motherboard replacement featuring live shorting of security chip pins to circumvent "Property of US Government" lockdown (!) runs OS X Lion on occasion just because it can, as well as my virtual instruments when I play keyboards live.

S