Homebrewed HP48 cards



#3

Some time ago I found pages on making homebrewed HP48 cards (typically battery-backed RAM), but I can't find them anymore. Does anyone here know anything helpful on that subject?


#4

There are a couple of designs available at hpcalc.org under HP48 -> Documentation -> Miscellaneous.

http://www.hpcalc.org/hp48/docs/misc/


Edited: 8 Jan 2012, 9:18 p.m.


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