Dot Matrix Display

The character screen bolted into the front of a rack unit — five columns by seven or eight rows per cell, several lines, and the unlit dots present the whole time. Square dark ink on a yellow-green backlit pane is the module every reverb and sampler shipped; round lit dots on black glass is the LED marquee, optionally scrolling on a clock that cannot drift. A bitmap prop drives the dots directly for meters, waveforms and logos, and a blinking block cursor marks the field being edited. The unlit grid is one tiled pattern and each line of ink is one path, so a 20x2 screen is a handful of nodes rather than 1,600.