> Unrolled manchester encoding, also untested.
> 
> ;---------------------------------------
> ;Manchester encoding
> ; Input: W
> ; Output: manch_hi:manch_lo
> ; Cycles: 20 cycles
> ; by: Regulus Berdin (untested)

That's pretty nifty, quick test with 00, 01, 55, AA, and FF is OK

Xiaofan's conversion would be ~ 200us (8 bytes), which makes
1/4ms more available for transmission

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