I have an old HP machine what I tried to flash. Of course that went wrong and now I have to write a flash on Raspberry and solder it into the DC7700 to be able to reuse my Debian system. As far as I understood I need FLASHrom to write the flash that is fine. I have already bought the chip it takes a month to receive it than I can test writing it with Raspberry.
The question is the image what to write. HP does not support with bin file to flash. It is bad, but it can turn to good no limitation on what to flash. I found libreboot and coreboot. There are some possibilities flash only with seabios, or go further grub2 or linuxboot.
I would like to ask help to create an image which works on the DC and flash it.