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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