Hello puzzling,
If you have an eprom reader you can just save the files as .bin. They actually compress well so 4x512 will end up being 700k-1200k depending.
It would be great if someone would start to look at emulation of the mark 5 platform.. as I can see it would not be too hard as it's such a simple system unlike all those old school arcade machines with hundreds of random eproms everywhere with all sorts of different sound, video, controllers.
But... I imagine the next thing would be to find a guru who can disect a mainboard and start something... the guru will ofcorse need a board donated to him.. don't know if he needs a working machine to ram snoop... not sure what they do!?
Cya