The Quicknet 2000 cards allowed you to boot from a remote server if desired, plus gave you powerful Arexx control of the machine over the network.
Good luck in finding one of these cards though, they're quite old now.
Cards like the Ariadne 1 & 2 can be fitted with a boot ROM, but you'd have to write the software for it yourself. I don't know of any available binary files you could easily use to do the job.
