Standalone Shell source

[Thomas Riemer <triemer@apt4g.a3nyc.com>]

Where can I find the source for the standalone shell that is being
run when the I boot up the kernel?

-Tom

P.S. progress on dz11 driver - transmit generates interrupts that
   produce characters on the serial line - however, the other direction
   seems not to generate interrupts. (i.e. receiving characters doesn't
   seem to work)

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Given enough eyeballs all bugs seem shallow.