Port 220, IRQ5, DRQ1/DACK1 (DMA1), DMA sharing off and Game Port on if no other game port.
Those are the Default settings and work best imho. Some older games look for sound on IRQ7.

Hey, I read some of those Dummies books. They make it very easy to understand anything.
I have a sound blaster Pro 2.0 already installed in one of my 486 computers.
I will boot it up and run MSD to Cheech my settings.

I just really like these sound blaster cards because once you get the hang of it they are easy to setup.
And are “plug & play” in Win3x and Win95.

I have the original CT1600 box with software and manual but no information on the jumper locations on the PCB ?
I know I had diagram photos of this before but I don’t know where I put them ?
Does anyone have jumper location Diagram photos of the CT1600 ?

https://theretroweb.com/expansioncards/s/crea … er-pro-2-ct1600

220/5/1 are the default/standard settings for SBPRO that every other card after this pretty much followed

Yeah, I checked on my current 486 computer CT1600 setting and I am using IRQ-7
And it works fine.
So I don’t know which is best for game compatibility IRQ 5 or 7 ?

I would say irq 7. Because older games look only for that, and newer games often have a config that let's you choose, or they use the BLASTER environment variable.

IRQ 7 was a popular choice, but would conflict with a parallel port in ECP/EPP mode, IRQ5 was probably the next most common and generally completely clear.
DMA 1 is pretty much standard unless anything else (scanner card) has greater need of it.
At one time, I had a scanner card (hand scanner) on DMA 1, floppy reserved on DMA 2, a secondary high speed floppy/tape controller on DMA 3 and the sound card on DMA 0 (DMA 0 is an odd one, on 8086/8088 PCs it was reserved for memory refresh, but became general on later ones).

When choosing resources among multiple devices, you start with the least flexible and move on to the most flexible

Set the SB to IRQ 7 if:
- it's supposed to be used with an XT-style HDC
- you really need to use some brain-dead early-SB software hardcoded to IRQ 7, and you can't patch it

Set the SB to IRQ 5 if:
- it's supposed to be used with OS/2, or other system with background printing using IRQ
- it's supposed to be used with Windows 9x, or other system with resource manager that likes to complain about conflicts
- it's supposed to be used with an LPT NIC

Otherwise, it doesn't matter.

Okay Yeah,
I found it.
I was looking for these recommendation settings taken from the Gigabyte manual “GA-486VF”

What about this CDROM input ( connector CN2 ) ?
Anyone know which is Right, Left, Ground, Neutral ?
I assume the white color pin is pin #1 and the Right channel ?

Update:
I found it
Red wire is Right channel
White wire is Left Channel
Black wire is ground

See photo

According to this picture below pin 1 is top left.
According to the manual that is Ground....
added: i have one ct1600, guess I could pull it out if need be....

Guys,
My Sound Blaster Sounds terrible.
I tried it an another computer running Win-95 and it sounds okay so I know its my DOS-Win3.11 setup.

Symptoms:
Audio sounds Slow
Reverb in audio
Crackling noise in Audio

See my photos and tell me what you think are the best settings ?
Also I think I may have conflicting drivers ?
I am using the Default setup setting's.

what resources does your card assigned to?
may be there's dma conflict with parallel port (for w95 that may be ok but for win31 that's a problem)

Cbb wrote on 2025-03-28, 10:37:

what resources does your card assigned to?
may be there's dma conflict with parallel port (for w95 that may be ok but for win31 that's a problem)

My sound card settings are
IRQ-5
DMA-1

I am using the Default settings as per documentation.

I think the Audio is Okay it’s just the MIDI play back that sounds funny.
Which settings should I use for MIDI ?

Cbb wrote on 2025-03-28, 10:37:

may be there's dma conflict with parallel port (for w95 that may be ok but for win31 that's a problem)

Hi there! To my knowledge, merely OS/2 is really using IRQs for LPTx/printing.

If the PC in question is an 8088 to 486 era machine with LPT port on an ISA card, then the wire of the IRQ 7 line to the parallel port chip can be cut.:
All it needs is just a small cut above the IRQ7 pin on the edge connector of the ISA card.
That way, there won't be any conflicts by accident anymore.

Btw, it's not seldom that two LPTs port use same IRQ by accident and without issue.:
If you have an old PC with on-board LPT port or an otherwise existing LPT port, it will be available as LPT1 at 378h and IRQ7.

If you then add a Hercules Monochrome Graphics Card, another LPT port will be added to the system, also occupying IRQ7!

Then, the original LPT1 will be renamed to LPT2 and the Hercules' own LPT port will be LPT1 at 3BCh and IRQ7.

This is done by PC BIOS automatically.

The IRQs and the port address are hard-wired, though and can't be changed via software.

Edit: In practice, on DOS, nothing really happens if Sound Blaster and LPT1 use IRQ7.
The "conflict" will only happen if both devices are being active same time.

And even then, it's not like a "short".
The worst normally happens is that data will be corrupted.

If you have a Covox plug on LPT1, you will hear nasty noise.
The Sound Blaster card may behave strangely etc.

The problem is rather with real multi-tasking OSes that use drivers that communicate with all devices simultanously.
OS/2 is such a beast, maybe Windows NT as well. Not sure.

Edit: I forgot something about Windows 3.1.. Not IRQ related, though.
It might be that there's stuttery sound in 386 Enhanced Mode.

I remember reading about it in the documents of WinMOD or MOD4WIN.
The problem could be fixex by using Windows Standard-Mode (WIN /S).

Edit: Also please note that there are many, many different versions of Creative Sound Blaster drivers.
Even special Tandy drivers for Windows 3.0 MME!
(There also was an Tandy OEM card that was a SB Pro/SB16 hybrid of some sort.)

For example, I remember that there was an old Window 3.1 SB16 driver that worked on a 286 in Standard-Mode, which isn't something taken for granted.
- Previously I merely knew about my PAS16 driver which could do that.

Anyway, user Cloudschatze knows a lot about such Creative things, I believe.
He has an interesting YouTube channly about PC music stuff, too.