On the ADM-3A only ^H, ^J, ^K, ^L, and some escape sequence (and uh maybe ^G?) did anything. I never saw those glyphs on it, dunno why
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Looks like they were for some special form-filling mode http://bitsavers.trailing-edge.com/pdf/learSiegler/ADM_2/ADM2_Maintenance_Man.pdf …pic.twitter.com/E1lHxDDS3c
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Wait, the ADM-2 had a microcontroller? The ADM-3A didn't, did it? I didn't see one when I took mine apart, but that was a long time ago
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On page 1-2 it explains that if you send ESC U then "control characters can be displayed", not just STX and ETX.
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The ADM-2 keyboard also has many more keys than the ADM-3A. Maybe the ADM-3A was a radically-stripped-down version, nearly just a glass tty?
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Yep, I believe so – the first one to hit a $995 price point (some assembly required).
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So it seems—and apparently the "A" at the end was the addition of the minimal cursor control stuff.
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I like that the ADM-3 documentation refers to "backspace" and "forespace" as opposites
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Amazing that it took $50 worth of hardware to do that cursor movementpic.twitter.com/dei5ZebQPn
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It's easy to believe — have you had one apart? The combinational logic for the character processing state machine must have been a PITA
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I like this so much. From IBM 2260 manual. (IBM 2260 seems like the earliest CRT terminal I can find, 1964.)pic.twitter.com/XFr1MAmVXH
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I think the earliest one I had know about was this IBM paper published in 1963, maybe about the same thingpic.twitter.com/dHdya9wLAd
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