Assertion: oscilloscope's channel | /r/HasProperty | 4/5 of the 512 points
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text: Some of that is taken up by program overhead (e.g. global variables, parameter stack and so on), and it was a challenge to get at least 200 bytes per channel (actually 205, since this works out to 410 points for FFT - where only one channel as acquired at a time - and 410 is 4/5 of the 512 points needed for the FFT, which makes interpolating it to 512 points fairly straightforward); a future version of the scope may use a different dsPIC device (but right now there isn't any that has all the other features, runs at 5V, and is available in DIP package).