I've manually loaded the boot-loader into a PDP-8 in about 1973. Since it had core memory, I'd typically load it as the last thing before leaving so that in th

I've manually loaded the boot-loader into a PDP-8 in about 1973. Since it had core memory, I'd typically load it as the last thing before leaving so that in the morning I could just load my paper tape and hit run. From a very fuzzy memory, it was about 30, 12bit words in length.