File:NTS scrolling seam.gif

Summary
Animation explaining how to perform scrolling across a horizontal playfield longer than 512 pixels. It uses the first four screens of a level in Nova the Squirrel. $2000 and $2400 are base addresses of the two halves of a 512-pixel-wide tilemap.

Animation by Tepples based on game map created by NovaSquirrel, originally posted as on 2018-07-23 (source).