Thanx, I will test this version when I get home from work later today (I will follow this guide, as I have never done it before:
github.com/PeterMue/ZX45-LinuxCNC/wiki/Mesaflash
). Please confirm that I need to update the fallback section first - or should I boot from the fallback section and update the main section?
My functional problems are that nothing seems to work anymore. After starting linuxcnc, and the CR1 LED goes on, I disable the emergency stop button, enables the machine and try to manually jog an axis. But the three stepper drivers never gets the enable signal (Red led on DM542A drivers never go green as they normally do) and nothing happens. Linuxcnc animates the movement on screen.
I will try to put a scope on the logic signals, as my problem of course could also be three dead stepper drivers, although the CR1 led indicates otherwise.