Here’s a video of NTRQ running in Nestopia. It’s just to show moving around and editing values in the editor windows. Currently the Song Edit window (top right) is the most functional. I’ve just got the navigation of the Pattern Editor window working so you can move around.
One of my current favourite features is the dynamic zoom on the cursor. When editing a value the value is magnified by about 150% to make it more visible. I’ve got it working on numbers and notes at the moment but it’s only operational in the Song Edit window (so the note editing is “fake”).
