Try removing all drivers and use Unisound, it should work perfectly with this SB.

Can You take a look at my bios and config. Performance is so poor for 486 dx2. Maybe this is the reason of that sound issue. 3d bench 1.0 shows only 13.6. In PCI slot is Matrox MGA it sholud be faster than idą svga.

Post a photo of the chipset portion of the BIOS. Also set the Gate A20 to fast/high.

More photos. Thx for a tip about Gate .

66MHz 486 is slow for DOOM.

I have abother 486dx2 and Doom runs ok with vlb cirrus. 13.6 in 3Dbench is speed of 386 dc40 . I suspect sth is wrong.

Does it run better if you disable soundcard in the setup?

66MHz will be okay-ish for DOOM engine, but will run smoothest in Pentium 133 (minimum) for a retro setup.

I've done some more tests.

I run doom benchmark from philscomputerlab. With no sound run normal without issues. Lookin on my infosys IRQ I'am worried about Interrupt Name: 10 Video where owner is CTMOUSE.

Update:
I've checked jumper settings on mobo for DX266 - seem correct. But...I've noticed that my 2 x 8 mb ram is in bank 2 and 3 - and manual show that should be in bank 0 and 1. When I'll back home I have to check it.

1System BIOS Cacheable : Enabled
2Video BIOS Cacheable : Enabled
3
4Slow Refresh (1/4 Freq) : Enabled
5
6IDE HDD Block Mode : Enabled
7IDE 32-bit Transfer Mode : Enabled

Also try these settings too

1HOST-to-PCI Burst Write : Enabled
2PCI Posted Memory Write : Enabled
3Burst Copy-Back Option : Enabled

Thx, I'll be at home soon and I'll check settings. I hope it helps.

If SpeedSys screenshot is correct, you have an Matrox Impression VGA card, which is far from being fast in DOS/VGA modes. Try swapping it with other PCI video card such as S3 Trio64 and check if everything is running fine - at least DX2-66 with all caches enabled and VLB\PCI graphics should be fine for 20-30ish FPS performance in DOOM

So what I have done:
- changed settings in bios as suggested in your replies - system works ok, no errors
- changed music card to SB vibra16.
- changed video card to PCI S3virge
- now score in 3dBench 1.0 is 47,5 for 486dx266
- checked with manual cache and cpu jumpers on mobo
- disabled com2 and parallel port in Bios.
- tested ram and put to 0 and 1 bank
- Install Hexen, the same issue as Doom. Slowdowns and distorted sound. Hard to exit to dos because keyboard act like is broken.
- When I setup only music in Doom and Hexen, games run fast, but music after start the game is just for one second and gone. When I exit game, other games dont see SB, and no sound. After reset other games like Sq4, Monkey Island and Settlers sound and music are ok.

I'm afraid there could be an issue with ISA DMA on this motherboard. Could you please run T8237 utility first without any ISA sound card installed, and then with sound card initialized? Another possible way to test ISA DMA is to check if you can boot from floppy disk, as floppy transfers use DMA.
If your processor support Write-Back cache, try setting your CPU jumpers to WB mode.
Additionally, try to move soundcard to another DMA channel (0 or 3, instead of 1 - UNISOUND makes it easy on PnP cards by means of tweaking the BLASTER variable).
Updating the BIOS (if it is stored in the Flash EEPROM) may also fix the issue, although I'm not sure if there is newer version for your motherboard.

Cadderlik wrote on 2024-01-05, 22:37:

So what I have done: - changed settings in bios as suggested in your replies - system works ok, no errors - changed music card t […]
Show full quote

So what I have done:
- changed settings in bios as suggested in your replies - system works ok, no errors
- changed music card to SB vibra16.
- changed video card to PCI S3virge
- now score in 3dBench 1.0 is 47,5 for 486dx266
- checked with manual cache and cpu jumpers on mobo
- disabled com2 and parallel port in Bios.
- tested ram and put to 0 and 1 bank
- Install Hexen, the same issue as Doom. Slowdowns and distorted sound. Hard to exit to dos because keyboard act like is broken.
- When I setup only music in Doom and Hexen, games run fast, but music after start the game is just for one second and gone. When I exit game, other games dont see SB, and no sound. After reset other games like Sq4, Monkey Island and Settlers sound and music are ok.

I don't know exactly what your problem with the sound is unfortunately.
But your timing settings are really slow. Speedsys shows that you are on par with a DX2-50.
So you only changed the PCI settings, is it correct?
Usually you can have fastest timings on a 33MHz bus.

Please try and change the following:
Auto Configuration => Disabled.
Then: DRAM Read wait states => 0 WS
DRAM Write wait states => 0 WS
L2 cache wait states => 2-1-1-1. That one should work 100%! I am not 100% sure, if the 2 DRAM wait states setting to zero will work, you have to stability test it.
Memory hole below 16MB => Set this to disabled!

If you don't mind you could post a screenshot again with your latest settings to let us double-check.
EDIT: Please keep also the suggestions from dominusprog.

Are you using an ISA riser card? Also, I noticed that the ISA clock is set too high.

1Keyboard Controller Clock : 16Mhz
2ISA Bus Clock Option : PCICLKI/6

No I dont use rider card. I've changed event at 240 i7 D3 H7 the same dostortion in Doom and Hexen. Changed isa slot what more. My actual Bios. Score in 4dBench

Decrease the ISA bus speed, second screenshot. Right now the ISA is working at 16.5MHz, 66/4=16.5.

ISA Bus Clock Option : PCICLKI/6

Also increase the keyboard controller clock.

1Keyboard Controller Clock : 16Mhz

Cadderlik wrote on 2024-01-04, 15:28:

Autoexec and config.sys from philscomputerlab, drivers also.

Have you tried different drivers? There a few different versions of the Creative Labs drivers floating around and not all of them work properly in my experience.

What worked for me were the drivers that Joseph_Joestar posted here: Re: Issues with AWE32 (CT3900) music and FM playback under DOS

You can also try the UNISOUND driver as an alternative: UNISOUND - Universal ISA PnP Sound Card Driver for DOS v0.80a

The other issue with Doom-engine games specifically is I find they require a clean boot or a sound card re-initialization, otherwise distortion will happen on Creative Labs cards like the AWE32. If you are testing games like Doom and Heretic, make sure to do from a clean boot before trying any other games.

Cadderlik wrote on 2024-01-06, 16:15:

No I dont use rider card. I've changed event at 240 i7 D3 H7 the same dostortion in Doom and Hexen. Changed isa slot what more. My actual Bios. Score in 4dBench

But the performance problem is now solved. Do you agree?
Superscape 50.0 seems ok / good.