So, I took the Monotron over to Portland in the USA for RustConf 2019. I'd added a couple of extra features since the ACCU talk, but I only had 30 minutes this time (instead of the 90 minutes i had before), so I had to cut a few things out. The main addition was that I brought my MIDI Keyboard and played a little tune with the Sawtooth wave in 3-note polyphony. I'd also added a roller-buffer to the video system, which allows me to map any visible scan-line to any scan line from any row in the text buffer. This lets you do neat tricks like flip the screen top to bottom, without using much CPU at all (the renderer just gets one extra array look-up per line).

Here's the video: