Two steps forward one step back: Having constructed a working Micro-to-USB-A adapter cord that I will mount in the back, I wanted to test it first. No mouse control. No keyboard control! In fact, if I SSH into the running system and check run 'lsusb' I only get the root hub device.
However, if I opt to ingore the little floppy switch power input and run power directly into one of the USB Micro ports, the other USB port works just fine, even into the emulator. Upshot: USB is not working properly when powered from the 5V input via the USB-C/Battery input. Now, that power works fine, and in fact I can run off battery alone (no USBC plugged in) which is great. My optical mouse even gets power to the red LED imager--but the OS doesn't recognize anything. What gives? Is the image configured to ignore USB ports at low voltage? I am at a loss.
Also, I can't get a double-press of button 2 to trigger an emu exit. Only the restart. My timing may be off--I see 500ms is the delay, but pretty sure I am hitting that and I only ever get restarts.