I meant to add this link: https://archive.computerhistory.org/resources/access/text/2019/08/102738269-05-01-acc.pdf https://archive.computerhistory.org/resourc

I meant to add this link: https://archive.computerhistory.org/resources/access/text/2019/08/102738269-05-01-acc.pdf https://archive.computerhistory.org/resources/access/text/20... CHM "Oral History of Lee Lorenzen" There's quite a few pages there about GEM and its history. "VisiCorp was working on the operating environment Visi On, which was going to be their answer to a graphical user interface. When I went and saw it, I said, "Oh, we could do better." We had an Apple Lisa, and it was a 68K-based system. That was awesome that they had that at Digital Research. I said, "Let's take concurrent CP/M." They had a 68K version running on the Lisa, but they didn't have any user interface. So, I said, "Let me do the user interface for it." I don't think I used the same code, but I basically redid everything to create something called Crystal, which was the Lone Star type thing, but running on this Lisa hardware. It had a mouse, and it had a bitmapped display, but it ran on CP/M 68"