How to > HP BIOS MiniPCI Fix- nc6000/others

semi · BIOS Newbie Joined: 27 Oct 2008 Posts: 23

hi,

@ fa001
my congratulations! Could you please shoe me the exactly byte string
that crashed the ADDCC?

@ oddi
in principle you have to add the whole checksum difference (68 04 80 DA)
to your global file checksum. that means,
- if one value is positiv, exactly this value is missing on this local value.
- if one value is negativ, exactly this value is too much on this local value.

In your example:

Without changes: global file checksum is AD8E431B
With changes: global file checksum is 4589C241
=> the checksum differences are 68 04 80 DA

this means that all local values are too little.
So you must find an "unused" bytestring which you can
add the checksum differences to correct it globaly.
at best another miniPCI id from your compressed whitelist
that you dont need. In some specialcases, with only one ID on the whitelist like nx9420,
you must search for an ascii string that you
dont need. in example " BOOTWAK"

You cant find the 68 04 80 DA in your biosfile, cause its only
a calculated value.

I will show you the simple algorithm to calculate the checksum differences.

Original BIOS ID:
(1st)E6008680 (2nd)BF431086 (3rd)802225A3

OWN BIOS ID:
(1st)E6001418 (2nd)BF010214 (3rd)186025A3

E6008680
-(E6001418)
=======
00007268(1st)

BF431086
-(BF010214)
=======
00420E72(2nd)

802225A3
-(186025A3)
=======
68(-3E)0000(3rd)

=>

00 00 72 68
00 42 0E 72
+ 68(-3E)00 00
==========
68 04 80 DA => this is the checksum difference

If you add the local values to a bytestring you dont need, and change
this in your biosfile, it will fix the checksum global!

I hope your question is answered? If not, feel free to ask.

Cheers semi

oddi · Posted: Wed Dec 17, 2008 3:25 pm Post subject:

very tnx, but i need solution about how find correct bytestring and copy to field : "Uncompressed bytes in compressed BIOS-file for correction "
tnx

semi · BIOS Newbie Joined: 27 Oct 2008 Posts: 23

ok, show me your whole compressed whitelist!

fa001 · Posted: Tue Dec 23, 2008 4:14 am Post subject:

semi,

It appears that any lower case letter for a hex digit such as e4 instead of E4 entered into the "Uncompressed Bytes in compressed BIOS-File for correction" will cause a crash. I have used several different ones.

semi · BIOS Newbie Joined: 27 Oct 2008 Posts: 23

You are right fa001,

thanks for your help!

The fixed ADDCC is online...

Cheers Semi
_________________
Awesome Dirty Do Checksum Checker V2

fa001 · Posted: Sat Jan 03, 2009 3:52 am Post subject:

Semi,

Installed your new version but get the following error,
"! C:\Documents and Settings\user\Desktop\ADDCC.rar: Invalid or corrupt authenticity information"

Is this a problem?

- Fred

fa001 · Posted: Sat Jan 03, 2009 3:57 am Post subject:

Semi,

Perhaps it is a problem when I try to run the app I get the following,
"The application failed to initalize properly (0xc0000135). Click on OK to terminate the application."

So it will not run on my nc8000.

- Fred

fa001 · Posted: Sat Jan 03, 2009 4:15 am Post subject:

Sorry, my bad! The second error is due to not installing .Net. I did know better.
- Fred

drieg · Posted: Wed Feb 18, 2009 12:13 pm Post subject: N620c BIOS FIX

@semi

First of all many thanks for your great work and utilities you made!
I'm trying now to adapt my N620c F.16 BIOS to accept my Broadcom miniPCI Wi-Fi card according to your guide for nc6000. I was able to found whitelist at offset 75D7A:

semi · BIOS Newbie Joined: 27 Oct 2008 Posts: 23

hi drieg,

the N620c looks like a new bios variation. There are three parts in this bios file.

1. only FF bytes
2. an uncompressed bios-part, I don't know why or for what...
3. the compressed bios-part

I have found a very simple solution for you.

- open the rom.bin with a hexeditor
- search for the header 00100100 (compdecw.exe)
- delete all bytes before the header (exclude the header itself)
- save the bios file under a new name

Volai! The decompress routine will work very fine.

You can find your ID's as is usual in 00020100.dec.

00007290 75 10 04 00 86 80 43 10 86 80 22 25 86 80 43 10 86 80 27 25 00 00 00 00 u.....C..."%..C...'%....

Good luck
Cheers Semi
_________________
Awesome Dirty Do Checksum Checker V2

aviko · Posted: Mon Mar 23, 2009 11:11 pm Post subject:

Yesterday I found link to this thread on HP support site :) I readed few times and trying to underestand. Unfortunatelly Im more familar with hardware instead of software so I prepared stuff for experiments... Patient is nc4010.

I soldered plcc socket and make spare copy of original bios just in case (via hotswap). Whitelist pulled from extracted latest bios 68BAS:

mb_1986 · Posted: Thu Mar 26, 2009 12:30 pm Post subject:

I have a problem...

Notebook: HP nx6125 with 68DTT bios

I downloaded bios update - version F.13 from ftp:// ftp. hp. com/pub/softpaq/sp41001-41500/sp41452.exe

I found: E4(7F)1419433C105813(8300D5) - this is original broadcom card,
but I do not see any other cards (???)...

I changed it to: 14(7F)180103581433E9(8300D5) - GN-WI01GS - Gigabyte card...

I fixed the checksum: 3D524F4D204261(FF) -> 7736478A204261FF...

And now bios give me an error: 104-bla bla bla for both cards...

I don't know what is wrong...

Please help... THX

Solved Smile

))
Now works Smile

))
Problem was bios F.11, on F.13 it works Smile

Thank you very much for this topic Smile

))

semi · BIOS Newbie Joined: 27 Oct 2008 Posts: 23

@mb_1986,

my congratulations!

@aviko,

I dont know what exactly your problem or your question is!?

Sure you can basically fix your checksum with an arbitrary Byte-String.
But its not so clever, if you take a Byte-String that appears
more than once in the uncompressed bios file. And its not so
clever too, if you take a Byte-String that is not in the same
uncompressed bios file.

It is also only clever, if you find a "lonly" Byte-String in the
00020100.dec.

But you can do it as you want, than you can check it exactly!

If you change an arbitrary value, a String, in the compressed file.
ONLY this part in the uncompressed file, is allowed to be changed!
If there is more changed, it doesn work, or you stackpointer runs
to nirvana... and your engine will crash or dont boot!

My advice to you: To fix your checksum, use the another ID's that
you dont need. Its very safe and its very unusual that you need all
the six or eight wireless cards atonce! Normaly, only one...

Cheers Semi
_________________
Awesome Dirty Do Checksum Checker V2

aviko · Posted: Thu Mar 26, 2009 11:48 pm Post subject:

well, finally i decided to edit only these parts as in tutorial and it works fine

Fisch · Posted: Fri Apr 03, 2009 5:59 pm Post subject:

hi, i want to patch my hp nc4200 for a atheros card

but, i cant find the complete intel card in the bios file and also cant decompress it

its the latest bios F.0F >> tiny.cc/akNg8