Selector for boot SD cards

[centaur0rpi]

I have an adaptor for the Nintendo DSi which provides switch selection for three games modules. I would like a similar thing to select different SD boot images. How many connections would it have to switch, please?

Folk say what is the use of Raspberrypi without an internet connection. Much work was done with zx81, Spectron and QL, amongst others, including business use on the last, before the internet, and it was intended to give a similar opportunity on new kit.

[Cloudcentric]

http://www.berryterminal.com/doku.phpberryboot

[centaur0rpi]

Berryterminal much too complicated; I need simple stand-alone applications e.g. a word processor alone. Another would be a QL substitute., and then one running PC Xchange.( which all goes on a 720K floppy with context help)