I have no reason to believe it is otherwise - i.e. I have no knowledge of anything else.   Your comment about PALcode being used as leverage, I never saw that in practice and I worked with a lot of external folks.     I think it was more of a delta-T between the time DEC engineering released the code and DEC-Semi got it to the field and the integrators into their systems.

I don't think DEC systems sales tried to compete with the DEC-Semi customers, although in practice​ I'm sure they were not very good at being to have it both ways and certainly made mistakes.   Maurice Marks was the lead techie @ DEC Semi in those days, and a colleague I used to see fairly often then.   I know Maurice would have screamed pretty loud if he saw the system side of DEC mucking up his business and I think G2-Bob would have swatted folks if they had - he wanted revenue anyway he could get it.   As I think you know my last DEC projects was the 1K Alpha were we spliced an EV6 into a $799 AMD based system.   The DEC guys were the ones that hated it (Compaq actually liked it because Dell could not do it).  Anyway, Maurice and I were shaking our heads on that one. 

Clem