Comment by zimpenfish

> By "rendered graphics" you mean "place characters on screen"?

It was a fully graphical 800x1024 (or 1024x1024) system running on 1982 processors.

https://en.wikipedia.org/wiki/Blit_(computer_terminal)

> having programmed more constrained systems decades ago doesn't magically make you knowledgeable on performance

Perhaps not but it does mean you've "written a program where performance really mattered" which I believe was the original claim?