Bios Mods -The Best BIOS Update and Modification Source

Hi,

here we go again.
I received a CH341A Programmer and Test Clip.
Dissasembled the U530 Lenovo Ideapad. And found the EEPROM.

But here comes my first problem.
The EEPROM has following label
AH1314
25B64BSIG
EP1478

I couldn't find a datasheet for it. So i tested the autodetect from the CH341A Programmer Tool.
With no Luck. It says Unknown Manufacture, unknown Memory Name.
So i took a look into the fptw response. Here i see:
GD25Q64 ID:0xC84017 Size: 8192KB (65536Kb)

So i had choosen GigaDevice GD25Q64, and readed the memory.

Is it safe to modify this EEPROM Image? Or is it no good sign when the EEPROM was not recogniced?
I don't have much experience with the used tools. So i am not able to make my own opinion. So the question is go on or stop here?

I attached a picture of the autodetect information and one of the IC/EEPROM.
The attached file is the output of the Tool (for me it looks good) i also tried to read it as en eon chip EN25B64 (25B64 vs 25Q64). Both images gd25q64 and en25q64 are identical, tested it with fc, here the output:

c:\>fc gd25Q64.bin en25b64.bin
Compare the files gd25Q64.bin and EN25B64.BIN
FC: No differences were found

My english is not that good, so if something was not understood, please ask for it.

Thanks a lot, and greetings

ZabbensX

Hi,

i am very interessted in understanding the process of removing the whitelist.
So i took the ROM file and loaded it with the phoenixtool and identified the modul.

then i loaded it with ida to identify the Check routine, think i found it, but in my opinion there should be an infinity loop to prevent the system from booting.

I only could identify an conditional loop, but i think it should be an uncoditional loop.
Added an image from the dissasembly with some comments.
My Idea would be to prevent the programm from jumping into the whitlist check procedur and
directly go to the ext procedur so the call returns (added an image to show what i mean - myIdea).

Maybe you can give me a hint so i can go on.

Added the modul in the attachment.

Thanks a lot and Greetings

ZabbensX

All work is very nice
Try this one :

http://rghost.net/6v5wdCBTl

Regards

Doante to me for all I do for all of us . . . look into my signaure
Just hex compare the two filse to see the diffences . . .

Now i see it
Nice work.

Will try to make a rom out of the information.

Thanks a lot

Greetings

ZabbensX

So and the Result is....
A working U530 Laptop with an Dell DW1550 AC Wireless Device.

I'am happy Thanks for the support.
Did the changes on my own - did'nt use your attached file, just take look to understand how you are doing it.

So now i'am looking for my next competion

Thanks a lot and Greetings

ZabbensX

Same problem as all 430 / 530 :

Error 280: Failed to disable write protection for the BIOS space!

Eerpom Chip Write Protect so only SPI Programmer can do the job :

https://www.bios-mods.com/forum/Thread-R...5#pid74575

let me know
Regards

(01-05-2015, 10:52 AM)lispad Wrote: [ -> ]...
I have U430 Touch and bcm94352hmb, but can't use it, because of whitelist.
...

BCM94352 will work if you have a recent BIOS.  I'm using it without issue on my u430.

Read my post #84...

(05-07-2015, 08:46 AM)RehabMan Wrote: [ -> ]

(01-05-2015, 10:52 AM)lispad Wrote: [ -> ]...
I have U430 Touch and bcm94352hmb, but can't use it, because of whitelist.
...

BCM94352 will work if you have a recent BIOS.  I'm using it without issue on my u430.

Read my post #84...

I can confirm that a GENERIC AzureWave Broadcom BCM94352HMB works fine on my u330 Touch. I did not get the lenovo FRU version even! Full AC compatibility at 866.5 mbps!!!

(05-07-2015, 08:46 AM)RehabMan Wrote: [ -> ]

(01-05-2015, 10:52 AM)lispad Wrote: [ -> ]...
I have U430 Touch and bcm94352hmb, but can't use it, because of whitelist.
...

BCM94352 will work if you have a recent BIOS.  I'm using it without issue on my u430.

Read my post #84...

Suprisingly, my BCM94352 is working well on last BIOS (7CCN62WW). On 7CCN61WW there was an error on startup.
Tonight, i'll try to follow your guide to install Yosemite. Thank you!

My network card is on the way out so I would like to get a new one and perhaps get an N version.

Do you need me to backup my existing BIOS..?

Current BIOS revision is 7CCN15WW

Thanks