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Hello, I finally got my boards today, rev 1.3b

Everything is fine while using minicom to send commands to the board. Every time I start up the interface, after I connect my computer starts making faint continuous dialup-like sounds, as if it were in a continuous loop. As far as I could tell from 10 minutes of usage, everything is fine except the annoying sounds. They are too faint to record (the vent is louder), but loud enough to bug me.
Any hints to make it stop?

My specs:
PC: Lenovo Z710 (i7, 6GB RAM if relevant I can post more, but specs are online)
OS: Highly customized (sorry) Ubuntu 13.10 with a non-standard kernel (v 3.12.6 compiled with custom flags to get some oscilloscope readings, 1000Hz timer frequency)

I don't know about Espruino, but in every JS interpreter I've come accross, parseInt is extremely slow. @Gordon could you confirm that Number(a.toFixed(0)).toString(16) is magnitudes faster than parseInt(a).toString(16)? I cannot test yet, since I am still waiting for my boards :)

Later addition (edit does not work): the command > /dev/null only suppresses the stdout, but the stderr messages will still be printed.

@Gordon sry for the late reply, I don't know how to enable notifications here :P

I don't think you can do that with a shortcut, but when I don't want the output from a script i simply redirect it to /dev/null, eg: compare the output of ls > /dev/null with ls :P

In linux, CTRL+u clears left, CTRL+k clears right. CTRL+l (small L) clears the screen (aka clear). Hope this helps.