I've been playing about with my concept for a Stamp-type module for the XMOS XS1-4G 144BGA part:
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Here is the schematic:
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and this is what the PCB will look like:
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I haven't placed all the parts yet.
It has a flash boot device, and may also boot from JTAG. The JTAG connector isn't on the board, to save space. It has 12 Core0 I/Os and
12 Core2 I/Os. I started doing it as a joke and then thought that it might actually be of interest to some people.
I don't think it will work properly on a solderless breadboard as the
1.0V core supply takes about 1.15A when all four cores and the XLink switch are running flat out.
Leon