Take a look at our
ThinkPads.com HOME PAGE
For those who might want to contribute to the blog, start here: Editors Alley Topic
Then contact Bill with a Private Message

How is the factory BIOS flashed?

General Questions, Rumors, Real news & More
Post Reply
Message
Author
MikalE
ThinkPadder
ThinkPadder
Posts: 1211
Joined: Sun Sep 13, 2015 9:51 pm
Location: Marissa, Illinois

How is the factory BIOS flashed?

#1 Post by MikalE » Mon May 18, 2020 5:43 am

What I mean is, what is the physical process?

Are the BIOS chips flashed as a batch is some sort of caddie and then soldered in, or are they all individually flashed one machine at a time after the chip is already installed on the MB?

Inquiring minds want to know...
A31p P-IV 2Ghz 2653-R6U
T500 T9600 2055-BE9
T510 i5 4384-DV7
T510 i7 4349-A64
T520 i7QM 4242-4UU Highly Modified

flolic
Posts: 9
Joined: Mon Feb 18, 2019 7:01 pm
Location: Split, Croatia

Re: How is the factory BIOS flashed?

#2 Post by flolic » Mon May 18, 2020 3:33 pm

They are almost certainly programmed right at (memory IC) factory. When you order larger batches of flash/eeprom chips you can get them preprogrammed for very little extra cost.

MikalE
ThinkPadder
ThinkPadder
Posts: 1211
Joined: Sun Sep 13, 2015 9:51 pm
Location: Marissa, Illinois

Re: How is the factory BIOS flashed?

#3 Post by MikalE » Tue May 19, 2020 12:52 pm

Thanks for the reply, but "almost certainly" doesn't give me a definite answer.

I guess it shall remain a mystery of the cosmos. We don't need to know what they do in those sealed off clean rooms... :evil:
A31p P-IV 2Ghz 2653-R6U
T500 T9600 2055-BE9
T510 i5 4384-DV7
T510 i7 4349-A64
T520 i7QM 4242-4UU Highly Modified

dr_st
Moderator
Moderator
Posts: 8418
Joined: Sat Oct 29, 2005 6:20 am
Location: Israel

Re: How is the factory BIOS flashed?

#4 Post by dr_st » Tue May 19, 2020 12:55 pm

There may not necessarily be a single approach. Also, regardless of the process used to flash the general BIOS, certain unique parts (such as the serial numbers and the MAC addresses) must be introduced through a special per-machine procedure.
Thinkpad 25 (20K7), X1 Carbon (20HQ), Yoga 14 (20FY), T430s (IPS FHD + Classic Keyboard), X220 4291-4BG
X61 7673-V2V, T60 2007-QPG, T42 2373-F7G, X32 (IPS Screen), A31p w/ Ultrabay Numpad, A21m 2628-GXU

flolic
Posts: 9
Joined: Mon Feb 18, 2019 7:01 pm
Location: Split, Croatia

Re: How is the factory BIOS flashed?

#5 Post by flolic » Tue May 19, 2020 1:47 pm

Few days ago I replaced motherboard of the HP ZBook 15 G1 laptop. New motherboard needs initialization when you start the machine. There is a program that is used to input serial number, product id and some other identifiers.
I guess bios chips arrive at factory preprogrammed and final configuration is written after the motherboard (or laptop) is assembled, via the automated process.

IMHO, there is no fuc*ing way they program bios chips before board assembly, that would be VERY uneconomical. Full programming after assembly is easier, but that would be waste of time. But configuring preprogrammed board only takes part of a second.

Post Reply
  • Similar Topics
    Replies
    Views
    Last post

Return to “GENERAL ThinkPad News/Comments & Questions”

Who is online

Users browsing this forum: No registered users and 17 guests