I have created a small tool to edit the patterns for the Nops rhythm box. It makes it easier to create a new pattern.h header with the export function.
It's a work in progress written in FreeBasic (QBasic style). I will add new features later. You can download and try it:
Download nopseditor.zip, Linux 64bit version.
Create a folder and extract the files there. There is no installer. Just launch it from the command line.
Check the permissions on the files and folders.
Changes:
0.2 Fixed the path to the background image.
0.1 Initial version