Hi All,
I wasn't aware of the GPL license, so I did some investigation last days. After reading the GPL licenses I can conclude that stangerm2 is right. So that means I do have to provide the modified sources as most of the current modifications are now build on top of a linked module in cgminer.
There are some
consequences in releasing the source though:
- As far as I know, Bitmain is free to use these improvements in their current and their new products they will sell. I do hope they compensate these free goodies with a multi algorithm D3 firmware one day

- There will probably appear modified firmware binaries which can cause damaging your miners if the maker doesn't know what he's doing...
- I had plans to buy a S9 as there are a lot of requests and make a modified S9 version, but I might consider not to jump on that boat for now. (let's first see what will happen with the D3)
Legit alternatives instead of releasing the sourcecode- I stop this project and take the binaries offline. I don't like this option, as the whole idea is to help improve the situations for the D3 owners.
- Temporary I take the binaries offline and I will write something from scratch / not linked to the sources of cgminer. This will take away the consequences, but a lot of time and effort (at least a month or two) will be put into something that will probably not lead to any improvements for you guys.
My proposal- Although these consequences I will release source of a stable version (non BETA) that allow others to investigate the voltage / fan mods / fault check improvements I did. (devfee related code will be removed from the source). This allow others to look into the changes I did to make a binary for themselves without devfee.
BETA functionality will be left out of the source right now since it's not yet stable and will create dangerous situations when used in a wrong way. I might have to restrict the use of a BETA versions to a closed group instead of providing a public link to the BETA versions.
Happy mining

Ciao Blissz
To add some encouragement to getting the source released, I'll be issuing a DMCA takedown to have bitcointalk remove this thread for copyright violations in 24 hours if the complete corresponding source code for all the distributed firmware binaries is not uploaded by then. I am a one of a number of cgminer copyright holders.