My PC runs Xubuntu 18.04, a distribution of GNU/Linux. I chose it in part because I found it faster to boot and faster to start applications than Windows. When I looked for a debugging Genesis emulator compatible with Ubuntu, I first looked at the Tools page on SpritesMind. Its recommended "Gens KMod" emulator shows a screenshot with a 2003 copyright date. Gens was reportedly the source of much of FCEUX's debugging UI, but it appears to be no longer maintained.
Elsewhere I saw someone recommend Regen. Despite its being proprietary software (and thus unethical software by the definition of some members of this forum), I decided to evaluate it. But I hit a snag when I read the included README file:
The build on the website is ten years old, making me fear NESticle/Genecyst-class accuracy. But this struck me as worse:======================
Regen/GTK+ 0.95 ReadMe
By AamirM, Copyright (C) 2009
The README file does not rigorously define "commercial purposes." However, the license of a different emulator-like software package, the Oracle VirtualBox Extension Pack Personal Use and Evaluation License, defines noncommercial use to "expressly exclude any use of the Product for commercial purposes or to operate, run, or act on behalf of or for the benefit of a business, organization, governmental organization, or educational institution." If Regen's definition of commercial use remotely matches Oracle's, this would rule out using Regen to test a Genesis-compatible program being developed with the intent of eventually distributing copies of the Genesis-compatible program on cartridge for a fee.You may use and/or redistribute Regen provided that you :
1) Do not modify and/or alter, in any way, the files included.
2) You distribute all the files you got originally with Regen.
3) You may not sell, lease, rent or otherwise seek to gain monetary profit from
4) You may not distribute Regen with ROM images unless you have the legal right
to distribute them.
5) You may not use Regen for commercial purposes.
What is considered commercial use (and thus prohibited use) of Regen?