How do I even turn that thing on?

[CounterPillow]

The things I missed were the following:
- DON'T attach all the wires before boot. One of the wires (for sending data) is attached last.

This was specific to some ROCKPro64s with some UART adapters, and I've not seen this issue appear at all on Quartz64, so is not really required.

If there's no UART output, the first thing to try is to swap the RXD/TXD pins around. Some adapters label them the other way around, sometimes mistakes happen, etc. I've personally spent half an hour debugging swapped cables once.

The problem Manjaro has right now (I've heard) is that it doesn't work on eMMC. This is unfortunate, but the Quartz64 CI image works on eMMC, personally I needed to fiddle with the Debian installer though to get it to partition the disk right.