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P4C800-E modBIOS


Antinomy

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That's interesting. Could you flash my BIOS, take the battery out, clear CMOS and boot without the battery at all? If you're switching from a 1023 to 1024 you should flash the chip completely - not only main section, but the full BIOS.

If you do this, please post photo of the boot of your POST screen and Jumperfree section.

On 7/30/2022 at 1:36 AM, Sparks.nl said:

With my stock bios they are still there. 

which version was it, do you have a copy?

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  • 1 year later...
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Something new for you! Found out two new strap/divider combinations: 1:1 (100MHz strap) and 1:1 (166MHz strap)
FSB 100 1:1
100-100.PNG.62d543e99dba8329ade504d467c510af.PNG

FSB166 1:1

166-166.PNG.6bc91b7953bbf9198dbdf4f4d9617573.PNG

 

Feel free to play with it. I've updated the benchBIOS to version 1.1. As you can see, PAT works on these dividers with 865PE boards too (checked on P4P800 and P4P800 SE).
@Tzk@digitalbath you might be interested in this finding. Digitalbath you might want to add this to your P4P800 SE BIOS. FSB100 is value 0000 and FSB166 is 1101.

benchBIOS v1.1.zip

Edited by Antinomy
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On 12/21/2023 at 2:00 PM, Antinomy said:

Feel free to play with it. I've updated the benchBIOS to version 1.1. As you can see, PAT works on these dividers with 865PE boards too (checked on P4P800 and P4P800 SE).
@Tzk@digitalbath you might be interested in this finding. Digitalbath you might want to add this to your P4P800 SE BIOS. FSB100 is value 0000 and FSB166 is 1101.

Oh, very nice! Nice find!

I am sorry, but I won't update the SE bios. I am going to give my SE away. If I find some time, I will look into the BIOS code to understand what you did there.

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1 hour ago, digitalbath said:

I will look into the BIOS code to understand what you did there.

I didn't change the code. I just labeled two dividers in the menu, like I said - values 0000 and 1101. O.K. I'll mod it. I found out that my BIOS works on P4P800/SE only with RAM in slots 1 and 3. With slots 2/4 it stops at POST A4. But I need 2/4 to use RAMbooster in slot 1.

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