Some of the early 2001 PETs had them IIRC. I dont know what it was, but when I took computers in highschool there were still a few of the old ones in the class

Some of the early 2001 PETs had them IIRC. I dont know what it was, but when I took computers in highschool there were still a few of the old ones in the class that had 4K and crappy keyboards and I think and there was something that didnt run on them. Hence it was a rush to reserve the fancy new 4xxx series. https://en.wikipedia.org/wiki/Commodore_PET https://en.wikipedia.org/wiki/Commodore_PET Ooooh, the nostalgia looking at those pics.