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Teletext and hypertext

Before the web, we had Teletext. As a child growing up with a home computer, I was fascinated by Teletext. Unfortunately, we didn’t have a TV with a Teletext decoder, as those were pretty pricey. My only chance to enjoy real Teletext was when visiting relatives. However, I had a BBC Computer, which had a Teletext mode known as Mode 7. In Mode 7, you could put a control character at a particular point on the screen, and all character cells to the right of that cell would display block graphics in a particular color when filled with a character code 160 or higher.…

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