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Sun Jul 13 17:59:41 EDT 2014

Buffered input, low-pri I/O


So need a buffered approach for UART.  Write to RAM from low-pri ISR.

For now: add a "macro callback" to the kernel USB routine, called
before the USB handler.


So ISR + buffer seem to work.  Something wrong with the rest though.


Seems there is memory corruption.  Cleared 1C0-1EF to 00 before.

1C0  5C F8 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1D0  00 00 00 00 00 00 00 00 00 00 F8 90 5C 90 5C F8
1E0  F8 F8 F8 F8 FE F8 F8 F8 F8 F8 F8 F8 FE F8 F8 F8
1F0  F8 F8 F8 FE F8 F8 F8 F8 F8 F8 F8 FE F8 F8 F8 F8




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