you can snapshot the memory with ARIII and run it from a booting disk, using;
SA 0:filename ... to save the file to DF0:
a command i forgert, to put ALOAD onto that disk
then put a startup sequence on the disk which has ALOAD filename to load the snapshot
you can only load up a snapshot which was taken on the same/similar Amiga configuration though (kickstart and memory), otherwise it gets confused.