neither. avr is the only processor and only additional components are sd card and ram. this is a well known project from years back.
While it isn't interpreted x86 as westfw mentioned, it is still not running the OS on the AVR.It is interpreting/emulating ARM instructions through the external RAM.So no, the AVR isn't running linux.
Just stop and think for minute, the AVR on an UNO has 32k of flash and 2k of RAM.It is simply not possible to load linux on it much less android which is another layer on top of linux.--- bill
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