Hmm how much RAM do you have inside? It’s possible there’s too much, at least on x86 there were issues with 768MB or more. There are some tricks to work around it.
I already found out that the installer seems not to like more than 192MB RAM. If I insert more than that I get to the kernel debugger
Problem now is that the installation finishes, but the PROM can´t find the installation. As I tried to install on a SCSI2SD, I will continue to test a real HDD and other adapters.
It doesn’t use all the possible patterns, it just test reading and writing to it, but some errors are only triggered by very specific patterns which memtest86 can spend a whole night to try.