As he thought about the microprocessor—a chip that had an entire central processing unit on it—he had an insight. He had been designing a terminal, with a keyboard and monitor, that would connect to a distant minicomputer. Using a microprocessor, he could put some of the capacity of the minicomputer inside the terminal itself, so it could become a small stand-alone computer on a desktop. It was an enduring idea: keyboard, screen, and computer all in one integrated personal package. “This whole vision of a personal computer just popped into my head,” he said. “That night, I started to sketch out on paper what would later become known as the Apple I .” At first he planned to use the same microprocessor that was in the Altair, an Intel 8080. But each of those “cost almost more than my monthly rent,” so he looked for an alternative. He found one in the Motorola 6800, which a friend at HP was able to get for $40 apiece. Then he discovered a chip made by MOS Technologies that was electronically the same but cost only $20. It would make his machine affordable, but it would carry a long-term cost. Intel’s chipsthe industry standard, which would haunt Apple when its computers were incompatible with it world university ranking. After work each day, Wozniak would go home for a TV dinner and then return to HP to moonlight on his computer. He spread out the parts in his cubicle, figured out their placement, and soldered them onto his motherboard. Then he began writing the software that would get the microprocessor to display images on the screen. Because he could not afford to pay for computer time, he wrote the code by hand. After a couple of months he was ready to test it. “I typed a few keys on the keyboard and I was shocked! The letters were displayed on the screen.” It was Sunday, June 29, 1975, a milestone for the personal computer. “It was the first time in history,” Wozniak later said, “anyone had typed a character on a keyboard and seen it show up on their own computer’s screen right in front of them.” Jobs was impressed. He peppered Wozniak with questions: Could the computer ever be networked? Was it possible to add a disk for memory storage? He also began to help Woz get components. Particularly important were the dynamic random-access memory chips. Jobs made a few calls and was able to score some from Intel for free. “Steve is just that sort of person,” said Wozniak. “I mean, he knew how to talk to a sales representative. I could never have done that. I’m too shy.
