The Alto was introduced in 1973, but was still available in the early 80s, so there is every possibility that someone wrote a Mandelbrot generator on it since i

The Alto was introduced in 1973, but was still available in the early 80s, so there is every possibility that someone wrote a Mandelbrot generator on it since it was discovered in 1980. However it is more likely that this happened on the Xerox Star which was around from 1981 and also after 1985 when the first popular Scientific American article about the set appeared...