A Github project has been started to reverse engineer Hyperkin’s Retron 77. This is for the purpose of jailbreaking, so different versions of Stella can be used, as well as potential compatibility fixes:
https://github.com/stella-emu/stella/wiki/Retron-77
…and speaking of compatibility, users are already maintaining a list of compatible games on Google Docs:
https://docs.google.com/spreadsheets/d/1lzJdxHuRL9I-EdJ0f1abb2a9Gv46qLj-gmAj-PSBbN0/edit#gid=0
#retron77, #hyperkin, #2600,