The interrupts and NOPs interfered greatly with the network cards, causing the whole thing to come crashing down when more than a couple of the computers were running at a time. It took at least a couple of days for the sysadmin to sort it out.
RIP George, thanks for introducing me to the Internet and I'm sorry that you didn't get to stick around for Linux and
"A complex system that works is invariably found to have evolved from a simple system that worked." -- John Gall, _Systemantics_