The RetroEditor is a line oriented block editor orginally written for use with RetroForth. It's a major part of the development environment in RetroForth, and is reasonably portable. See RetroEditorPorts for implementations for various Forth systems.
Screenshot (with optional syntax highlighting enabled)
Please note that in RetroForth, blocks are 8x64, rather than 16x64. This allows blocks to map directly to physical sectors in the native version, and doesn't hinder programming under a host OS. In fact, it's easy to use one block for code and the other as "shadow" block for comments.
Editing commands
block# s Select new block line# i ... Insert ... onto line# column# line# ia ... Insert ... onto line# at column# x Delete the current block line# d Delete line# from the current block p Select previous block n Select next block v View the current block e Evaluate the current block
Commands for loading/saving blockfiles in RetroForth
#blocks blocks Set the number of blocks to load/save use filename Set the filename to load/save load filename Set the filename, and load it for editing reload Read the file to memory save Write the file to disk
Notes
While editing on a line by line basis can be tedious at times, it's certainly doable, and makes extending the editor very, very simple. (See RetroEditorExtensions for some of these)
