I do not know how to use cheatcode. But I have tried
kvm -m 512 -cdrom $PFAD/knx/remastered.iso
It showed the logo, boot: and then the same messages
Decompressing Linux... Parsing ELF.... done
Booting the kernel..
[ 3.171152] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(8,1)....