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History of Science & Technology Q&A (April 20, 2022)
The Stephen Wolfram Podcast
The History of the HPE9800
HPE9800s had overlapping video memories, one was ASCII character based, there was HP plotter language control. There were seven segment displays which are made from lighting, lighting, lighting and diodes in the shape of an eight. They could display sort of lots of characters as these kind of miniature bitmap displays just sort of a ticket tape one character at a time. It also had along with probably a thermal printer that printed a little strip of paper. I'm not sure that there was any way of getting graphical output from the mainframe at that time.
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