Can not run installer with new GRUB image
I tried the new image "debian-10.0-powerpc-grub-NETINST-1.iso" from 
on a PowerMac11,2 (Power Mac G5).
I was able to boot the cd with GRUB, but I was not able to run the
To boot the image, I dd'ed it on a USB drive and booted with
OpenFirmware by using the following commands:
I see grub and I can select "default install", but after that I end up
with a blank screen from Open Firmware telling me "Invalid memory access".
MD5SUM from my USB stick is the same as the downloaded is, as to say:
I also tried to boot the same USB drive on a PowerMac6,4 (eMac G4), but
I was not able to list the files contained in the file system.
I used the command:
which returned me "can't OPEN the DIR device".
If someone can see an error in this last OF line, please let me know.