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SB PnP 32 CT 3620 and DOOM 1 sound issue

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Reply 20 of 30, by CoffeeOne

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dominusprog wrote on 2024-01-06, 16:28:
Decrease the ISA bus speed, second screenshot. Right now the ISA is working at 16.5MHz, 66/4=16.5. […]
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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.

Keyboard Controller Clock : 16Mhz

Are you sure about that?
Internal clock = 66MHz on this board? Really?
Then the correct setting for ISA would be /8

Reply 21 of 30, by digistorm

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On a DX/2 the bus would be running at 33.3 MHz and so also the PCI bus. /4 is a normal divider for a 33 MHz bus and would result in 8.33 MHz ISA bus.

Reply 22 of 30, by Cadderlik

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So I should leave PCICLKI/4?

Reply 23 of 30, by CoffeeOne

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Cadderlik wrote on 2024-01-07, 09:37:

So I should leave PCICLKI/4?

I think so, yes.
What is also wrong then is the ratio Host clock / PCI clock. It is now 1: 1/2 according to your screenshot.
That would mean PCI bus is running out of specification (16MHz), it is below the allowed minimum, which is 25MHz as far as I know.
So => 1:1 then it should be 33MHz. graphics should be again faster.

Now when I think about it, when your PCI clock is now 16MHz, then the ISA clock would be only 4 MHz now? Weird.

Reply 24 of 30, by Cadderlik

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Nowe Set 1:1, somehow bios changed it. Sound issue still in Doom like.

Reply 26 of 30, by Cadderlik

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Tomorrow I'll try and give an info. I will also check another keyboard with oryginal din. Now Im using PS2 with adapter.

Reply 27 of 30, by dominusprog

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CoffeeOne wrote on 2024-01-06, 22:02:
Are you sure about that? Internal clock = 66MHz on this board? Really? Then the correct setting for ISA would be /8 […]
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dominusprog wrote on 2024-01-06, 16:28:
Decrease the ISA bus speed, second screenshot. Right now the ISA is working at 16.5MHz, 66/4=16.5. […]
Show full quote

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.

Keyboard Controller Clock : 16Mhz

Are you sure about that?
Internal clock = 66MHz on this board? Really?
Then the correct setting for ISA would be /8

My bad, I thought it divided the internal clock.

Duke_2600.png
A-Trend ATC-1020 V1.1 ❇ Cyrix 6x86 150+ @ 120MHz ❇ 32MiB EDO RAM (8MiBx4) ❇ A-Trend S3 Trio64V2 2MiB
Aztech Pro16 II-3D PnP ❇ 8.4GiB Quantum Fireball ❇ Win95 OSR2 Plus!

Reply 28 of 30, by Zerthimon

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Has anyone mentioned the "Turbo" button yet ?

Reply 29 of 30, by Cadderlik

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Turbo is ok. Speed is eqal to dx2 in benchmark.

Reply 30 of 30, by CoffeeOne

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Cadderlik wrote on 2024-01-07, 18:40:

Tomorrow I'll try and give an info. I will also check another keyboard with oryginal din. Now Im using PS2 with adapter.

So what is the status now?
Everything is fast only the sound in doom is not working? Is it correct?
Did you try unisound?