alt Hacker NewsThe example on the linked video it isn't, correct.
Here is another video, this time with S-PACKAGE used to develop Nintendo 64.
https://www.youtube.com/watch?v=gV5obrYaogU
Which given the REPL capabilities, you can easily embedd them on it, just like the other video.
Later rebranded as Mirai. I remember playing with a pirated copy of Nichimen Mirai somewhere in 2001 (I think), it looked weirdly Ediacaran in the Cambrian explosion of the late 90s.