Submission + - SIMH has become the Open SIMH project (groups.io)
There has been quite a bit of drama in the SIMH world which came as a direct result of changes in the SIMH 4 branch which made it incompatible by default with common disk images. After many complaints, the author of those changes and the ostensible head of the SIMH 4 branch added a new license to certain parts of the code, likely in violation of the project's license.
As a result, many contributors expressed their desire to move their contributions back to the SIMH 3 branch, which is still maintained by SIMH's original author, Bob Supnik. In response, the Open SIMH project was created.
https://github.com/open-simh