> All I can think of are the obvious causes:  TRISB not set right?
> Some peripheral overriding RB10?

Done some more testing. The problem appears to be confined to
RB <11:8>, or the 3rd nybble of LATB. Every other LATB pin
responds to bclr/bset. If you touch an attached scope probe it
suggests that these 4 pins are inputs, despite the CLR TRISB

Haven't found anything yet to indicate there's something special
about them

Tried 2 other ICs straight out of the tube, and stripped the code
down too, skipping LCD and remapping sections

Joe

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