- Dec 21, 2019
- Gigabyte Z390 Designare iMacPro1,1
- RX 5700 XT
Ok. Just so I've understood you fully: I should follow the guide you linked to including Y-splitting pin 17 (Pi) to pins 3 and 7 (clip)? Can this be done with the jumper wires or do I need to actually splice the wire?I would recommend Pi 4 first without the supplemental procedure. Attaching the clip to the chip must always be done very gently and with excellent near sightedness. If you are naturally near sighted and need glasses or contacts for distant objects, those corrective lenses should be removed. Also use a flashlight to align the clip to the chip and confirm that pin 1 on the clip is oriented with the tiny dimple on the chip.
The “flashrom” command needs to be tweaked a little. When you’re ready to proceed, the first thing we’ll do is attempt to read the chip. The SOIC clip may need to be adjusted (i.e. reseated on the chip) slightly until flashrom detects the chip.
The flashrom command to read the chip is:
sudo flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=4096 -c MX25L12835F/MX25L12845E/MX25L12865E -r bios-1.bin
CH341a USB reader/writer:
sudo flashrom -p ch341a_spi -c MX25L12835F/MX25L12845E/MX25L12865E -r bios-1.bin
This should be done three times, each time incrementing the digit in “bios-1.bin” by 1. So second time it will be bios-2.bin. The existing contents of the chip will be read and saved into the bios-x.bin files.
I could get some reading glasses to get closer, though I think I'm pretty steady (I used to do Warhammer modelling/painting and I once OC'd a PowerMac G3 by literally cutting off the trace for one of the jumpers on the MB with a scalpel ).
Should I disconnect other stuff like nvme drives or can I leave it in?
Oh and can you share the correct bios.bin? Should I just use the official F9i or something else (like the original F7 to match what I had)?