Not really what the OP was after, but a couple of us at work built the
GameBoy DSO and I have found it very usefull for relatively low frequency
jobs where power is a problem e.g. checking igntion/injector waveforms on
car enignes.  Only real downer is the author signed a deal with Elektor so
he can't open the source code.

http://www.semis.demon.co.uk/Gameboy/DsoDemo/DsoDemo.htm

Regards

Mike

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