Hi Grant;
As Soon as I have some time.
I will convert your program to octal and enter in at the addresses you have and try to run it on my machine, since it should work, I don't expect any problems, but if there are any, it should show up, I would expect mostly operator error - with the entering - even though I am not using ROM, but Ram instead, that should not make any difference. that will test to see if it is copying all the bytes. And see whether it works !!
Thanks Marty