Hi Mike,

I wholeheartedly agree.
MIBAM with multiplexed display doesn't seem like it's worth it, because you loose so much of the available dutycycle.

Thanks for the explanation of the diagonal line.
I did get your example working, with only 8 leds (2 columns).
I made enough changes to not know if it's actually the way yours works or not.

But I don't see a way to incorporate it into the MIBAM routines (because of the duty cycle losses), so I'm officially tossing Charlie out the window.
Good thing I live at ground level.

I'll complete the modifications for your previous idea (full port updates) and get this thing done.

Thanks for all your assistance Mike, much appreciated.