dm- wrote on 2025-02-06, 13:12:

Works perfect.

running Tualatin 1400S cpu on full speed w/o beeps -)

Glad to read that it works. Have fun. 😀

dm- wrote on 2025-02-06, 13:12:

btw: last jumper on the dip switch must be set off, it is also somehow affecting "beeping".

Maybe that has something to do with the intended usage of the signal pins of the PIIX by the stock BIOS. Some (like the THRM# one) can be re-purposed as general purpose I/O pins (which is what the mod now does).

myne wrote on 2025-02-06, 13:21:

Now to turn prochot (throttle) into a menu option 🤣

Is the goal to nerf the system or to have beautiful music constantly playing in the background? 😁

Throttle for dos!
Iirc it'll drop 75%.
Set fsb=66,cache disabled, cl3, and therm and it might be slow enough.
The noise might be harder to disable.

Managed to find this

Btw Deniz...
I don't suppose you have ever documented what the bios uses the PIIX4 gpios for at all?
I have some idea, but maybe you know more

Dunno if this will help with this project, but I think I've figured out what the as97127f does - mostly.

Asus AS97127F ASIC reverse engineering

myne wrote on 2025-02-14, 03:01:

Managed to find this

Cool, thanks. Interesting to see there's multiple variants of monitors included. Never thought this might be floating around. 😀

myne wrote on 2025-02-16, 05:48:

Btw Deniz...
I don't suppose you have ever documented what the bios uses the PIIX4 gpios for at all?
I have some idea, but maybe you know more

No, sorry ... I vaguely remember seeing manipulation of GP status bits when looking at APM event handlers, but I never got far with this.

It'd be nice to know which ones at least.
There's a few pins missing from my reverse engineering.
I have suspicions, but not confirmation

Mr.Hunt wrote on 2025-01-31, 08:32:

Hello all! Be careful with the bios for p2-99b it doesn't work, the system won't start after flashing.

Thanks for the info! I've checked the mod and couldn't find any obvious error. Do I understand correctly that the BIOS does not show any signs of life after flashing (i.e. no beeps, no VGA output)?
[/quote]

Hi! Yes, no beeps, no output video. I restored to previos image of bios by using another board at hot swap (haven't special device), and after motherboard start to work. I do not know maybe revision of motherboard must be another ? Today think to flash bios for p3b-f, scary 😀

So I just picked up an ASUS CUV266-D

Board is missing tualatin microcode just like the CUV4X-D. Would you make an updated bios down the track?

Hello,
Just got in my hands original P2B-DS and i tested a bios...

It does not work correct with 2 cpu. Second CPU being super slow. like 386. First cpu running at full speed.

Same behaviour for HP E60 version -( second CPU slow.

reverting to original beta 1014 fix the bug.

ps.

P3B-F bios also looks like has a bug: CPU voltage can not be adjusted. It's always set as CPU wants.

dm- wrote on 2025-04-06, 10:04:

P3B-F bios also looks like has a bug: CPU voltage can not be adjusted. It's always set as CPU wants.

I have the P3B-F 1.04 and I am quite sure that the CPU voltage settings works for me. What makes you think that it does not work?

i have 2 P3B-F and both boards does not regulate voltages from bios.
board always set voltage according to cpu pins configuration.

DenizOezmen wrote on 2025-02-01, 08:58:

Thanks for the info! I've checked the mod and couldn't find any obvious error. Do I understand correctly that the BIOS does not show any signs of life after flashing (i.e. no beeps, no VGA output)?

I have a P2-99B. Could you post the BIOS again, I'll check it.

Sorry for the late replies.

dm- wrote on 2025-04-06, 10:04:

It does not work correct with 2 cpu. Second CPU being super slow. like 386. First cpu running at full speed.

Weird. I already had a confirmation of the mod working. I'll try and check if something broke in the meantime.

dm- wrote on 2025-04-06, 10:04:

P3B-F bios also looks like has a bug: CPU voltage can not be adjusted. It's always set as CPU wants.

Where are you checking the voltage? Remember that the custom voltage is not applied until after POST, i.e. if you check the voltage in the BIOS setup itself, you will most likely see the CPU's stock voltage. (The only time you'll see the custom voltage in the BIOS itself is after a warm boot.)

SWZSSR wrote on 2025-04-03, 15:24:

So I just picked up an ASUS CUV266-D

I assume you already had reached out via email? If it wasn't you, there's a build on the download page. 😀

overdrive333 wrote on 2025-10-28, 16:11:

I have a P2-99B. Could you post the BIOS again, I'll check it.

I'll send you a DM, thanks.

Today I was working with the TUV4X. The result is that all TUV4X BIOS versions have some kind of flaw.

Versions 1003, 1004 (Beta), and 1005 were extremely unstable. The memory only ran at 133 and 100 MHz in CL3 mode; as soon as even one timing value was changed, it froze. Only 66 MHz ran with CL2. I don't understand it. Here's an example result for the three versions; it was largely identical.

Version 1006 (Beta, your mod) was "okay". However, when "7ns (143MHz)" was set under SDRAM Configuration, the BIOS displayed 2-2-2-5, but Windows only ever showed 3-2-2-6. The BIOS simply refuses to set the CL2 value. Even with "User Define," the CL2 value isn't applied after booting. And now it gets interesting. With the "by SPD" setting, the BIOS displays 2-2-2-6. After booting, however, it shows 2-3-3-6. Another difference is that, even though the "Memory Interleave Enabler" is installed, only "2-way" is displayed with "7ns", "8ns" and "User Define". But when "by SPD" is selected, Bank Interleave is set to "4-way", as it should be. Quite a mess, in my opinion.

The values ​​with the "7ns (143MHz)" setting in the 1006 BIOS:

The values ​​with the "by SPD" setting in the 1006 BIOS:

Now to version 1002. BIOS version 1002 at least sets the SDRAM configuration correctly. CL2 is indeed CL2. Except for the bank interleave oddity described above. "4-way" is only applied under "by SPD".

The values ​​with the "7ns (143MHz)" setting in the 1002 BIOS:

The values ​​with the "by SPD" setting in the 1002 BIOS:

My question is, could you modify your 1006 Beta Version in this way, that it will set the CL2 Value by selecting "7ns" or "User Define" and when "7ns" or "User Define" is selected, then also "4-way" Bank Interleave?