28F010 vs 29F010

[Pipo]

I need to replace a bad flash memory chip marked 28F010 on a computer
board but this chip appear to have been discontinued.

Can somebody tell me if the 29F010 flash memory chip is hardware and
sotware compatible with the 28F010?

 

[petrus bitbyter]

"Pipo" <tderoux@electroux.com> schreef in bericht
news:1129717248.650530.288910@z14g2000cwz.googlegroups.com...

I need to replace a bad flash memory chip marked 28F010 on a computer
board but this chip appear to have been discontinued.

Can somebody tell me if the 29F010 flash memory chip is hardware and
sotware compatible with the 28F010?

Both devices are pincompatible. Once programmed, they behave the same but
the programming algorithms differs too much to make them interchangable.
Didn't you find the datasheets? Can mail them if you want to.

petrus bitbyter

 

[nobody]

On Wed, 19 Oct 2005 15:22:02 +0200, "petrus bitbyter"
<pieterkraltlaatditweg@enditookhccnet.nl> wrote:

"Pipo" <tderoux@electroux.com> schreef in bericht
news:1129717248.650530.288910@z14g2000cwz.googlegroups.com...
I need to replace a bad flash memory chip marked 28F010 on a computer
board but this chip appear to have been discontinued.

Can somebody tell me if the 29F010 flash memory chip is hardware and
sotware compatible with the 28F010?


Both devices are pincompatible. Once programmed, they behave the same but
the programming algorithms differs too much to make them interchangable.
Didn't you find the datasheets? Can mail them if you want to.

petrus bitbyter

27010 eprom is also pin compatible. If you have binary image, you can
burn eprom and install in place of 28F010 (assuming you do not need to
flash this on board in future). I did this years ago when a user
flashed wrong version of bios to PC.

28F010 can be still obtained. www.sayal.com has some SKU #106317

You likely can also find pulls from old mother boards from 486 / 586
era.

 

[Ken]

Pipo wrote:

I need to replace a bad flash memory chip marked 28F010 on a computer
board but this chip appear to have been discontinued.

Can somebody tell me if the 29F010 flash memory chip is hardware and
sotware compatible with the 28F010?

If I am not mistaken, the 28 denotes a +12 programing voltage and the
29 denotes a +5. I could be wrong, but once programed they should both
work the same.

 

[Franc Zabkar]

On 19 Oct 2005 03:20:48 -0700, "Pipo" <tderoux@electroux.com> put
finger to keyboard and composed:

I need to replace a bad flash memory chip marked 28F010 on a computer
board but this chip appear to have been discontinued.

Can somebody tell me if the 29F010 flash memory chip is hardware and
sotware compatible with the 28F010?

You *may* run into problems when the BIOS wants to "update NVRAM". The
ESCD table, which contains resource information for configuring PnP
devices, is generally stored in a reserved area of the flash chip.
Windows will also want to write to this area, unless you tell it not
to. Some motherboards have a +5V/+12V jumper for selecting the
programming voltage, many don't. I don't know how different the
programming algorithms for the two chips are, but you could check the
list of supported devices for the BIOS flash utility. That may give
you an idea as to their software compatibility.

-- Franc Zabkar

Please remove one 'i' from my address when replying by email.

 

[Pipo]

Thank you very much folks. You have all been very helpful.

In the mean time I found AMD´s application note #17097 at
http://moon.feld.cvut.cz/hw/amd/17097c.pdf were everething is clearly
explained.

Again, thank you all.