+nmra watchdog seems to lose a byte of idle from the beginning somehow
+ (don't know if this happens with host-supplied data)
+
+
layout polarity diagram colourful segment encoding:
- wire layout diagram thing into Tcl and see speed etc.
make moveable feature selection in subseg2display bitwise rather than
setwise
-fix points on A5 and A6 so that J points are separate from M points
- done that but it's not coming out right. the p0.segenco.ppm has
- the right encodings for the different points but they are displaying
- the same so must check subseg2display and test-ui
-
-1. Write lots and lots and lots of PIC programs
+safety system no crashes at crossovers please