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> C1000,c3xxx Stereo In, Internal Mic, Wifi, Bt, ...from angstrom mailing list
post May 13 2008, 11:32 PM
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some discussion of hardware hacks came up on the angstrom user's mailing list* so I thought people here would be interested.

It began with an off-the-cuff remark by Stanislav Brebec about stereo audio input, I asked for more information. he explained that the Zaurus x000 series are capable of stereo sound input, it's just that Sharp decided to ground one of the inputs, here's the HOW-TO


that message also goes on to discuss internal microphone, wifi and bluetooth - click on the "next message in thread" to see the follow-ons.

the hardware discussion then carries on in this thread:

* I am not on the dev's list as I got fed up with the bitching
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post May 14 2008, 03:59 AM
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Well, first things first, RINPUT1 is not just tied to ground; it's connected to pin 2 on the jack. I don't think it's a "historical" leftover or anything - smartest thing to do is to look at eviljazz's driver source to see exactly what is being done with that signal. (headphone/microphone detection perhaps?)

Easier to target RINPUT2/LINPUT2 (pins 25/26 on the chip) anyway - they are not connected to anything on the schematic, and the pictures of the board only show a couple of stub traces covered by solder mask, no vias. Since the chip pins are accessible and larger than those traces, it's probably easiest just to solder straight to them.
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