20
votes
Accepted
In this movie I see a strange cable for terminal connection, what kind of connection is this?
It's probably much like the Ampex 210. See page 2-7 of the Ampex 210 Operating Manual. Based on the position, it would be the primary RS232S port connected to a ribbon cable.
Ribbon cables were used ...
- 711
19
votes
In this movie I see a strange cable for terminal connection, what kind of connection is this?
25-wire ribbon cables were quite common for serial ports. See, for example, the classic breakout box:
I preferred using cables and adapters. Typically I would use 6-wire cables (ground, TX, RX, CTS, ...
15
votes
What was the last terminal to include a physical bell?
To my memory real bells were only a thing with TTYs. After all, ringing a bell is just another lever to be moved when a character comes along - the very same way as any other printable character.
I ...
- 199k
12
votes
Accepted
Sending video to Telerate 9" Green Monitor
It is unsure if this will help, but it might just be the monitor after all.
The termination switch on the monitor is incorrect.
It must be set to 75 ohms. It is currently set to no termination which ...
- 25.6k
11
votes
Was there ever a monospace display system (eg terminal) that used a vertical cursor?
I am going to suggest a reframe of the entire question.
Before addressing the question of what the earliest cursors looked like, I want to ask what the cursor represented. From the very earliest text ...
- 5,093
10
votes
Did any computer systems connect "terminals" using "broadcast"-style RF to multiplex video, and some other means of multiplexing keyboards?
The closest thing I know of is the IBM 2848 Display Controller in combination with IBM 2260 terminals. The 2848 generated, transmitted and stored video signals for up to 24 terminals. It did, however, ...
- 8,992
9
votes
Sending video to Telerate 9" Green Monitor
If you can see the test screen from the converter, the converter is generating a signal the monitor understands, but the converter does not understand the input from the computer.
You are most likely ...
- 1,937
7
votes
Dumb Terminal Access to Tandy TRS-80 Model 100?
How do I setup the TRS-80 Model 100 to use an [...] dumb terminal so I can control the TRS-80 Model 100 [...]?
You won't get around programming this.
On board software like the TELCOM program, as ...
- 199k
6
votes
Which historical Unixes supported terminal I/O with five or six bits per character, and with what character sets?
They were supported by Unix System III with the DH11 and DZ11 asynchronous multiplexers (serial line interfaces for DEC systems).
While termios.h is only in POSIX systems, the constants come from the ...
- 782
6
votes
What was the last terminal to include a physical bell?
I think the Teletype Model 43, ~ 1980, included a mechanical bell. It has been a while - I got rid of mine around 1986. The service manual references a "bell coil" and "bell plunger&...
6
votes
Did any computer systems connect "terminals" using "broadcast"-style RF to multiplex video, and some other means of multiplexing keyboards?
Well, if custom build devices also count, I would present the SLS-Guckies :))
It was a quite unusual terminal system custom build based on telephone keyboards and TV sets, build for a none existing in ...
- 199k
5
votes
Did any computer systems connect "terminals" using "broadcast"-style RF to multiplex video, and some other means of multiplexing keyboards?
I think the Knight TV system built at the MIT AI lab fits the bill. A PDP-11 with custom add-on boards generated the video signals for a bunch of regular TV monitors. Separate hardware scanned ...
- 3,011
5
votes
Sending video to Telerate 9" Green Monitor
The monitor will display the HDMI/AV converters test screen, but not my actual computer signal.
Guess: The timing for your actual computer signal is wrong, probably because the HDMI input your are ...
- 24.9k
4
votes
Which historical Unixes supported terminal I/O with five or six bits per character, and with what character sets?
While many types of peripheral assumed fewer than 7-bits per character (i.e. did not support 7-bit ASCII), I think it's important to appreciate that just because termios supports a setting doesn't ...
- 1,308
3
votes
Write fault error writing device COM1
The first ultimate thing to do is to check whether a physical loopback is working. In your PC, short RxD and TxD pins in the connector and check whether you see echo in your PC terminal. Also check ...
- 9,731
2
votes
Accepted
Write fault error writing device COM1
From a comment:
The Amazon listing says it’s for connecting a PC to an “AT modem.”
Then this is, as cup and mnem suspect the issue.
I don’t know if it’s a null modem cable.
If it's to connect a ...
- 199k
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