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On 12/29/18 4:47 PM, Jeremy Jackson wrote:
>
> On 2018-12-29 10:39 a.m., Kumonie Williams wrote:

Hi Kumonie, Jeremy,
adding Paul and Lynxis to CC as they were initial contributors of change
s.

>
> ...
>
> Though, I do have a question I was hoping you'd be able to answer:
> The Dell OptiPlex 7010 has a service mode jumper, and, from my
> understanding, two ROM chips for two firmware images, the primary
> one used when the service mode jumper is not set, and the secondary
> one used when the service mode jumper has been set, with an
> immutable firmware image. My question is, given I only have one PC
> at the moment, my OptiPlex 7010, if I, say, flash a coreboot image
> that won't boot, would it be possible for me to simply set the
> service mode jumper from that point to safely use the second ROM
> chip? If so, it would make testing much easier.
>
> FYI, I have a 7010 that I bricked doing a Dell firmware update.
> The jumper didn't help me recover (yet?).  I have one other that
> updated successfully.

I'm not sure about what jumper you talking. There are 2 close to BIOS
chips RTCRST and PSWD - neither would help directly in recover form bric
k.

I took a picture of 2 chips [1][2]. First seems to be SPI which
contain BIOS and second I would say is storage for Dell bloatware that
can run various hardware tests and display useless messages [3]. I
will insepct SOIC8 later today, but SOIC16 requires special clip which
I don't have at this point.

@Paul,Lynxis, if you flashed anything on those devices please let me
know if there is any special treatment.

Apparently [1] seems to be MX25L3206E [4] - which is well supported by
flashrom. Second seems to MX25L6406E [5] - I wonder how much of that
we will need - it would be great to have additional 8MB of space.

I hope to take a look at it today night - will let you know about the
progress.

[1]
https://www.instagram.com/p/Br-p_2klRVL/?utm_source=ig_web_button_share_
sheet
[2]
https://www.instagram.com/p/Br-pt8jFX5Y/?utm_source=ig_web_button_share_
sheet
[3] https://twitter.com/pietrushnic/status/1071384206603939843
[4] https://www.netcheif.com/Reviews/PLA5405/PDF/MX25L3206E.pdf
[5]
http://www.macronix.com/Lists/Datasheet/Attachments/7370/MX25L6406E,%203
V,%2064Mb,%20v1.9.pdf

Best Regards,
- --
Piotr Król
Embedded Systems Consultant
https://3mdeb.com | @3mdeb_com
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