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PDP-11/40 Computer and ASR-33 Teletype

WoffordWitch

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Beginner. No background in the topic needed.

26K views18 years ago1 recommendation

HardwareHistory and cultureRetro computingHistory of computing

A live demonstration of a DEC PDP-11/40 minicomputer running the RSTS/E operating system and outputting to an ASR-33 teletype.

Here is a video taken in 2007 of a live DEC (Digital Equipment Corporation) PDP-11/40 Computer system running a 1979 V7 version of the RSTS/E Operating System. An ASR-33 teletype is connected to this PDP-11/40 via a 20mA current loop connection using the DZ11 M7814 multiplexer. Watch the ASR-33 teletype run the SYSTAT program as it clanks out the system status!

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What people say. Recommended to show the physical reality, speed, and noise of writing code on early teletype terminals before glass screens became common.

u/pdp10in r/C_Programming • Recommends

On “How did people write C using line editors?”

link to this video 1. Have you ever used a printer with continuous-feed paper, like a dot-matrix or daisy-wheel? Yes, you could change it, but you tried not to. 2. Yes. 3. You would consider it interminably slow. And loud. 4. Yes. Glass terminals hit the tipping point where they began to be cheaper than teletypes in 1974. Like any other disruptive innovation, within a few years they had become predominant by far. Faster, cheaper, more pleasant, zero consumable cost.