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Wow. I hadn't realized before today that the Apple I was basically a computer with a built-in character-only ASR-33 teletype terminal for interacting with it. O
by russellbeattie 5y ago
Wow. I hadn't realized before today that the Apple I was basically a computer with a built-in character-only ASR-33 teletype terminal for interacting with it. Or, said another way, it was a teletype terminal which happened to have its own computer inside to talk to.
So, how did the Apple II end up using standard graphics memory which enabled games and such? From a 1984 Byte interview:
> Steve got intrigued with all these ideas and one day he asked me, "Why don't you use these new 16-pin dynamic RAMs?" I had looked at them in my work at Hewlett-Packard, but they were new and I couldn't afford any parts that didn't come my way almost free. I'm a little bit shy, and I didn't know any of the reps, but Steve just called them up and talked them into giving us samples. I jumped on it. I thought it was a great part because you could replace 32 chips on a board with just eight. It was a little more difficult to use because you had to multiplex the row and column addresses and that cost me one or two chips. But I was very happy because it was TTL [transistor-transistor 1ogic] compatible and I could save a lot of board space because the parts were so much smaller.
I guess this also answers the question of what Jobs was doing while Woz was being a genius. These guys were 26 and 22 - the hacker and the hustler. Sooooo amazing.
- jecel 5y ago> Or, said another way, it was a teletype terminal which happened to have its own computer inside to talk to. That is exactly what happened. A friend showed Woz how to access the Arpanet so he decided to build his own terminal. That was working before he started the Apple I, which simply added a built-in computer to the existing circuit. In a similar way, the 1980 Decmate and the 1977 VT78 simply added a microprocessor version of the PDP-8 to an existing terminal (VT100 and VT52, respectively).