is there any chance to get the source code of the Real-Time enabled HotSpot?
I think of a kind of academic release for evaluation or an open project ...
E.g., the JDK 7 SE is fully available for download.
Sun Java RTS is not an open source project/product.
Binary downloads are available for evaluation (both academic and non-academic).
Source licenses may be purchasable (as they were for JDK before it was open-sourced) but that isn't a side of things I'm familiar with.