HP Compaq 6710b F.20 BIOS mod with SLIC2.1 table?

Hi all,
I did ask for the above, but in the wrong thread, sorry my apologies for that.
...so boldly asking here now, is there a HP Compaq 6710b BIOS mod with a SLIC 2.1 table?
I did see a F.16 version of this BIOS, but thats an old one, i'am more in favour of the F.20 version.
Please help me out here, if possible please? Asking -almost begging- nicely...
I'll keep hoping for it.
TIA.

 

Hi sebus,
Strange the F.16 BIOS version is modded, there isn't any difference with the F.20 version (besides some corrections for the machine itself).
Next, i don't understand your second remark about losing the HP guru from here?
Please could you explain.
Thank you.

 

Ok agreed, but this is meant for the actual flash- procedure and downgrading of the BIOS- version. That's not what i've asked, i did ask if it was possible to add a SLIC table (v2.0, v2.1) into the F.20 version BIOS. That's a whole other thing.
Ok, thank you for your explanation of things, i still don't agree but i'am no specialist and have to comply with your answer and respect.
Thank you.
TIA.

 

Hi Serg008,
Just some questions please about these BIOS'es. I would be grateful if you would/could answer them for me.
1. Is it a question on how to Flash/Program the modified BIOS- binary into the system with the appropriate software?
2. or is it a question that it's not known where in the BIOS (offset) the SLIC table has to be fitted/placed?
3. or are there multiple offsets in the F.20 BIOS where (parts) of the SLIC table or tables have to reside?

If it is only a question on how to flash the modified F.20 BIOS into the notebook, maybe i can have a go with it, but then i need the modified binary. Would you send it to me then please?
Did you check the checksum of the modified binary if it's correct? I'll remember from the old EPROM days that the last position in the ROM has to hold the Modulo- checksum of the whole contents of the ROM.
Ok, hope to hear from you.
With kind regards.
Harm

P.S.: The notebook in question, HP Compaq 6710b is sold with Microsoft Vista (as operating system) on it. I believe (didn't check) that the BIOS has a SLIC v2.0 table in it already. That's what i'am told by a HP- user today. Maybe this helps a bit. I still think that's it's a shame that such awonderful notebook with the f.20 version BIOS can't be modified...

 

Bump! Nothing?

 

Ok Serg008, i'll understand, but when you have some time left, please have a look for this Compaq F.20 BIOS issue? Please...

 

Thank you Serg008 for the binaries supplied.
It was impossible for me to flash your modified F.20 HP Compaq 6710b binary into the system. I've used several utilities (yours included) and end-up eventually with a self-modified HPQFlash.exe file wich bypasses a.) the signature check en b.) the version check.
I did finally came to the conclusion that the loader (already residing in the HP flash-chip on the motherboard) is checking if the "master binary", the actual BIOS itself matches a pre-programmed checksum. If this checksum fails the flashprocedure is terminated at once.

So "our" problem resides in the final checksum of the F.20 BIOS itself. This numberhas changed due to injecting/modifying the BIOS wit the requested v2.1 SLIC table.
If we had a way of correcting the checksum of the modified binary (the BIOS- file in this case) and re-packed the whole thing into a .CAB file, the Flash-procedure would work. I'am 100% sure of this.
Now the 1 million dollar question, where is a program wich can calculate the proper checksum of the F.20 v2.1 SLIC BIOS? ...or who's to debug the part of the checksum-check with SoftIce or similar?
Who's good in assembly? Reverse engineering is a more appropriate term here.

Allright, thank you anyways for your coorperation in this matter.
Maybe i'll bump into something in the near future.
TIA