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'[PIC]: Programming a SST39SF020 90-4C-PH BIOS Chip'
2002\02\08@141548 by Dans_PIC_Stuff

picon face
I mentiond this a while back in the list and tried all the tricks and tips
that a few people advised me of but nothing worked.  I have an ASUS MB with
a SST39SF020 90-4C-PH Award Flash 2Mbit BIOS chip.  The chip is definatly
not right in the head since I swapped it with the BIOS in an identical MB
which did work.  So, I'm wondering if there is anybody (Preferably near the
San Diego, CA area) that has the ability to re-program such a chip?  Some
links to spec sheets and the BIOS Image file are below:

BIOS Chip Number: SST39SF020 90-4C-PH
BIOS Chip URL:
http://www.partminer.com/design_center/images/pdf/D2716781.pdf  (you must
log in to PM first, then paste the link)
BIOS Image: ftp://ftp.asus.com.tw/pub/ASUS/beta/mb/bios/p3bf1071.zip
BIOS Image FIle: 1007f.001 (256K)

I'd be happy to pay you for your efort.  Thanks for any help.

 -Dan

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2002\02\08@143230 by Eoin Ross

flavicon
face
No need to find another person to do it - you already seem to have the tools !!!

Download the right bios and flash utility from ASUS ...

Boot up into DOS using the correct flash (boot from DOS floppy with no memory management etc)

remove the BIOS chip CAREFULLY ... insert bad BIOS chip carefully (no pins in wrong slots etc)

now run the flash utility

Everything should be fine now : )
HOWEVER ... I used to work in a PC assembly plant as a Tech - we had a bunch of boards from Soyo I think - some would get flashed and be fine others wouldn't - I tracked it down to a certain batch number of the flash chip that was screwing up. Did it go screwy after you flashed it?

I used the above routine to fix the 100 or so boards we had bad.



>>> spam_OUTdans_pic_stuffTakeThisOuTspamHOTMAIL.COM 02/08/02 02:14PM >>>
I mentiond this a while back in the list and tried all the tricks and tips
that a few people advised me of but nothing worked.  I have an ASUS MB with
a SST39SF020 90-4C-PH Award Flash 2Mbit BIOS chip.  The chip is definatly
not right in the head since I swapped it with the BIOS in an identical MB
which did work.  So, I'm wondering if there is anybody (Preferably near the
San Diego, CA area) that has the ability to re-program such a chip?  Some
links to spec sheets and the BIOS Image file are below:

BIOS Chip Number: SST39SF020 90-4C-PH
BIOS Chip URL:
http://www.partminer.com/design_center/images/pdf/D2716781.pdf  (you must
log in to PM first, then paste the link)
BIOS Image: ftp://ftp.asus.com.tw/pub/ASUS/beta/mb/bios/p3bf1071.zip BIOS Image FIle: 1007f.001 (256K)

I'd be happy to pay you for your efort.  Thanks for any help.

 -Dan

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2002\02\08@170035 by Dans_PIC_Stuff

picon face
OMG, I can do that?!  You mean the computer won't go nutz on me and freeze
if I pull the BIOS out while it's in DOS?  That thought had crossed my mind
but I passed it off as being a silly and stupid idea. haha
I'll try that.

 -Dan


{Original Message removed}

2002\02\08@175529 by Tim H.

picon face
Yes, you can do it. It's called hot-swapping. The reason you can do it
is because the BIOS is copied to RAM and thus the actual chip isn't
needed anymore. You just have to be exceptionally careful.

Regards,

Tim Hamel

Dans_PIC_Stuff wrote:
>
> OMG, I can do that?!  You mean the computer won't go nutz on me and freeze
> if I pull the BIOS out while it's in DOS?  That thought had crossed my mind
> but I passed it off as being a silly and stupid idea. haha
> I'll try that.
>
>   -Dan
>
> {Original Message removed}

2002\02\09@011957 by Dans_PIC_Stuff

picon face
YESSSSSSS!!!  Hot-swapping the BIOS chips DID the trick!  It worked well.
Thank you guys for that very helpful trick.  :-)

 -Dan

{Original Message removed}

2002\02\09@013241 by Kathy Quinlan

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face
----- Original Message -----
From: "Dans_PIC_Stuff" <.....dans_pic_stuffKILLspamspam@spam@HOTMAIL.COM>
Subject: Re: [PIC]: Programming a SST39SF020 90-4C-PH BIOS Chip
> YESSSSSSS!!!  Hot-swapping the BIOS chips DID the trick!  It worked well.
> Thank you guys for that very helpful trick.  :-)
>
>   -Dan


Just as an aside, I had a similar problem with a Tyan motherboard, I tried
to flash it and it just kept hanging.

The bios chips have an area that allows dos booting, and is never over
written, it also contains a built in routine for flashing the chip. The
totally stuffed MB was restored by re running the flash utility from dos
(although it was limping badly) and to remove one of the flags -f IIRC and
all was good, I ended up with a repaired chip and a MB that reported the cpu
correctly ;o)

Regards,

Kat.

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