Serial console

[SuburbanDad]

I'm pretty sure the last time I booted my board I used the UART on the EXT header. What image are you booting?

I am booting armbian bionic (https://www.armbian.com/pine-h64/)  from SD.  But my interest in the serial console is that I am trying to get the image onto an emmc card.  I have been able to write the image onto the emmc, but it never boots.  I would love to be able to see what it is/isn't doing on boot.