Some of these old serial terminals can do real graphics but the whole topic is rather obscure (which makes it more interesting i suppose).
Dynamically Redefined Character Set (DRCS) was introduced with DEC VT200 and even though online information is scarce, there is enough there to make it work on a real machine.
Even more interesting are the Yugoslavian/Slovenian video terminals with their own custom graphics modes and features - it is a lost art but we at the Museum are working on bringing it back!
They were connected to a VAX/VMS mainframe cluster at 19.2kbits.
Thanks for sharing!
A month ago, a guy in Maribor had (maybe still has?) a non-working DEC VT101, a working Gorenje Paka 3000 and some terminal printers, but he didn't want to sell anything separately, so I didn't buy anything from him.
I have a feeling you know of him.
