Not wanting to highjack the "[h390-vm] Support for 3066 Graphic Terminal" thread.
What was unique about the 3066? I understand it was the integrated console for the /165 and /168, but what unique programming considerations were there for it? I see that some of the standalone utilities couldn't be used with it.
I couldn't find any information on it in Bitsavers (other than reference to not being able to use the 3066 with some of the standalone utilities).