Questions tagged [terminal]

For questions related to terminals such as WYSE, VT100 and Teletype.

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Why was Teletype Corporation's Model 33 ASR console always mounted on a metal stand? [duplicate]

Why are all complete Teletype Corporation Model 33 ASR shown mounted on a dedicated metal stand?
PDP11's user avatar
  • 619
7 votes
3 answers
478 views

Could Teletype Model 33 ASR console work on a desktop, without the dedicated stand?

Definitely, the earlier teleprinters, like Model 15 and even earlier could be put on a table. But for some reason the fashion shifted and most hard-copy terminals in the 1960s and 1970s used a special ...
Anixx's user avatar
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9 votes
9 answers
5k views

Why did the VT100 terminal have to be connected to a host computer if it already had a processor?

The VT100 terminal already had an 8080 processor. So why did it have to be connected to a host computer? Why not use its processor to perform computations? Is it because the VT100 processor's purpose ...
Noob_Guy's user avatar
  • 691
7 votes
3 answers
969 views

Did any computer systems connect "terminals" using "broadcast"-style RF to multiplex video, and some other means of multiplexing keyboards?

Rendering a screen full of text as a video signal required a substantial amount of circuitry, especially in the era before LSI semiconductors. A device to generate display signals for a moderate ...
supercat's user avatar
  • 35.7k
8 votes
2 answers
6k views

In this movie I see a strange cable for terminal connection, what kind of connection is this?

In the movie Fantozzi va in pensione (1988) I see a strange cable for terminal connection, what kind of connection is this? seems a scsi cable, but I know the terminal is Ampex 220 and as I know ...
elbarna's user avatar
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7 votes
3 answers
1k views

Sending video to Telerate 9" Green Monitor [closed]

I found an old Telerate green monitor at a thrift store and figured I could run my computer output through an HDMI -> AV converter with no problem, or a Raspberry Pi composite output signal. Turns ...
bitterlake's user avatar
7 votes
2 answers
384 views

Which historical Unixes supported terminal I/O with five or six bits per character, and with what character sets?

The specification for termios.h includes a facility for controlling the number of bits per character sent over the serial line, the CSIZE and CSn constants. You can request five, six, seven, or eight ...
zwol's user avatar
  • 449
16 votes
2 answers
2k views

What was the last terminal to include a physical bell?

Drew asks: … what was the latest terminal produced which rang a physical bell rather than beeping through a speaker?
scruss's user avatar
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7 votes
2 answers
327 views

Was there ever a monospace display system (eg terminal) that used a vertical cursor?

Related to my earlier question about IBM PC cursors, I am now wondering if there has ever been a monospaced character display system (such as a terminal) that would've implemented a vertical cursor in ...
tuomas's user avatar
  • 2,763
6 votes
1 answer
464 views

Dumb Terminal Access to Tandy TRS-80 Model 100?

How do I setup the TRS-80 Model 100 to use an external 80col. 30 row dumb terminal so I can control the TRS-80 Model 100 ... BASIC from the dumb terminal? I have a VersaTerm connected to a VGA monitor ...
wperko's user avatar
  • 141
3 votes
3 answers
477 views

Write fault error writing device COM1

I’m trying to send data between a no-name Celeron PC running MS-DOS 6.22 and a Digital VT520 serial terminal. I have connected COM1 to the terminal’s COMM1, but can’t get data to flow in either ...
Jacob Krall's user avatar
  • 2,309
5 votes
2 answers
406 views

Was there a system with customarily backspaced prompts?

Nowadays, a default prompt in a Unix shell might look like % _ or $ _ (with the underscore indicating the cursor location), or, on other systems, a more elaborate string, like C:\>_. On the besm-6, ...
Leo B.'s user avatar
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0 votes
0 answers
115 views

Micro-Term ERGO 301 (C134) Terminal Keyboard compatibility

I dug up my old ERGO 301-C134 Terminal, but in the various house-moves, the keyboard has gone missing. I searched and searched the roof-cavity, but it has probably been lost. Click to embiggen ...
Kingsley's user avatar
  • 353
6 votes
1 answer
713 views

How should I set CCGMS on my Commodore 64 to login to a Linux machine?

I have a Strikelink WiFi modem for the C64 (see here and here) and I can connect to a BBS without issues using CCGMS 2017 v4 and the following settings: Baud = 9600 Modem Type = UP9600 / EZ232 For ...
Pitto's user avatar
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1 vote
1 answer
187 views

How to send and receive messages between modern computer and Commodore 64 via WiFi? [closed]

I want to be able to connect from my Commodore 64 to a Linux Raspberry Pi. The ideal solution would be something like ssh that allows me to use the linux machine using the c64 as a terminal but the ...
Pitto's user avatar
  • 243
7 votes
0 answers
237 views

Small format X terminal with EL screen

I remember an ad for a small-format (about as wide as a 60% keyboard) dark-ish grey colored X terminal that had a 12" (?) yellow electroluminescent screen similar to the Grid laptops but higher ...
rbanffy's user avatar
  • 491
8 votes
7 answers
3k views

What was the first OS with the type-ahead capability from a dumb terminal?

In a command-line environment of a contemporary Unix-like system, it is possible to "type ahead", that is, for example, to start a process which runs for a while and does not require any ...
Leo B.'s user avatar
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14 votes
5 answers
4k views

How did early video terminals convert ASCII into font graphics?

I'm building a Z80-based breadboard computer from scratch to learn more about simple processors, and I'm a bit stumped when it comes to the base concepts of building a text-based terminal. I've got an ...
lowercasename's user avatar
6 votes
3 answers
365 views

WY85 terminal with WY60/ASCII keyboard

Some time ago I've found a working Wyse WY85 terminal, and a keyboard that can (physically) connect to it, marked WY60/ASCII. I was now trying to make the terminal work, but noticed that none of the ...
Ale's user avatar
  • 163
47 votes
6 answers
8k views

What is a Dumb Terminal?

There seems to be some confusion what a 'Dumb' terminal is as visible in answers and comments to this question about portable dumb terminals. So: What is a Dumb Terminal? Points that would help to ...
Raffzahn's user avatar
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17 votes
8 answers
3k views

Were there ever any dumb terminals in a portable form factor?

I’m curious if there was ever a case of a company making some sort of serial ASCII terminal, but in a portable factor, such as a laptop or even reasonable luggable. I’ve seen plenty of portable ...
an earwig's user avatar
  • 473
5 votes
1 answer
533 views

What were the characteristics of the Siemens 8160 and 9750 terminals?

An answer to a recent question https://retrocomputing.stackexchange.com/a/22332/4274 referred to the Siemens 8160 and 9750 terminals, which struck me as interesting enough to ask about separately in ...
rwallace's user avatar
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26 votes
3 answers
3k views

How and what did it mean to connect to ARPANET from home?

In the iWoz biography, I read: Now, TV terminals I already knew a little about. […] I'd already built a terminal that could access the ARPANET, the government-owned network of computers that was the ...
natevw's user avatar
  • 2,937
4 votes
0 answers
314 views

What keyboard protocol do IBM 3151 Terminals speak over RJ45

I've recently acquired an IBM 3151 Terminal without keyboard and I'm not willing to spend any money on an original keyboard. This is why I've tried searching Google for any datasheets of the IBM RJ45 ...
Unkn0wnCat's user avatar
12 votes
1 answer
816 views

Can anyone help identify this old terminal and printer found in an abandoned nuclear power plant?

I was watching a video on Youtube of some guys exploring an abandoned nuclear power plant(I believe to be in the US or Canada) that was decommissioned around 1991, and noticed this equipment at one ...
Hitek's user avatar
  • 927
4 votes
2 answers
334 views

Did communication between a PLATO terminal and mainframe use pushes?

I'm trying to learn more about how the PLATO system worked with respect to communications. I've read some of the specs, but coming from a web-background I'm unfamiliar with the underlying way that the ...
Luke's user avatar
  • 141
6 votes
2 answers
355 views

Behavior of DECDHL on single lines

The escape sequences ESC # 3 and ESC # 4 (DECDHL) are meant to be used on pairs on adjacent lines to request double height lines. As an example: echo -e "\e#3DOUBLE HEIGHT LINE\n\e#4DOUBLE HEIGHT ...
ninjalj's user avatar
  • 745
11 votes
6 answers
1k views

What did order processing on a teletype look like?

The earliest business data processing systems were based on batch processing of punchcards. Prepare cards off-line, feed a batch of them through the computer. (Why does one so often hear of payroll, ...
rwallace's user avatar
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17 votes
1 answer
1k views

How did SABRE work interactively without screens?

The SABRE airline reservation system went online in 1964, astonishing the world by being among other things the first large-scale interactive computing system. Once the IBM 3270 video terminals were ...
rwallace's user avatar
  • 60.2k
8 votes
2 answers
294 views

Why was the VT05 resolution 72×20?

According to https://en.wikipedia.org/wiki/VT05 the VT05 presented the user with an upper-case only ASCII character display of 20 rows by 72 columns. At first glance this seems a reasonably natural ...
rwallace's user avatar
  • 60.2k
14 votes
5 answers
3k views

Advantage of RS-232 over 20mA current loop

According to https://en.wikipedia.org/wiki/VT52 Like other early DEC terminals, the VT50 series were equipped with both an RS-232 port as well as a 20mA current loop, an older serial standard used ...
rwallace's user avatar
  • 60.2k
10 votes
1 answer
888 views

PET as a terminal

While reading about the SuperPET I just recalled another PET modification. My uni had an 11/780 that I learned FORTRAN on. It used modified PETs as input terminals. This took the form of a modified ...
Maury Markowitz's user avatar
17 votes
2 answers
2k views

Emulate a text-mode DOS program using a Unix terminal

Is it possible to run a text-mode DOS program in an emulator under a Unix-like operating system (Linux/*BSD/macOS) such that DOS text-mode input and output is done on a Unix terminal instead of a ...
Lassi's user avatar
  • 273
6 votes
4 answers
601 views

What monitor could render APL2 characters in 1985?

BACKGROUND: In 1985, I took an evening class in APL at the local IBM as part of a high school Explorer Post (which was really cool, these guys giving up their time to teach us programming). Other ...
TZFan's user avatar
  • 413
7 votes
2 answers
1k views

What 1970's terminal was black on white and had an orange keyboard?

In high school, I programmed on a terminal that was retro THEN, and I need help remembering make and model. White screen, black text (seemed very unusual to me), no lowercase, 24x80, and I have this ...
TZFan's user avatar
  • 413
12 votes
1 answer
987 views

Why did IBM develop 5250 block mode terminals when 3270 already existed?

IBM introduced the 3270 family of block mode terminals in 1971, for use with IBM mainframes (System/370 and successors). Then, in 1977, IBM introduced the 5250 family of block mode terminals for use ...
Simon Kissane's user avatar
3 votes
3 answers
452 views

How did control characters work in real teletypes?

Emulated terminals can accept control characters, being able to move the position of cursor, to delete a char or a word or even to clear all screen, change foreground and background colors, etc. ...
Daniel Bandeira's user avatar
1 vote
1 answer
137 views

Overstriking for APL on 3270s?

This question addressed the question of APL overstrikes on printing terminals. However, IBM also had 3270 video display terminals that supported APL, as well, and those, too, handled overstriking. How?...
Jeff Zeitlin's user avatar
  • 1,318
35 votes
2 answers
4k views

What mid-1970s to mid-1980s home computers had their graphics characters added to Unicode 13?

The Unicode 13.0.0 release notes mention among the symbol additions: 214 graphic characters that provide compatibility with various home computers from the mid-1970s to the mid-1980s and with early ...
natevw's user avatar
  • 2,937
5 votes
1 answer
461 views

What did the Datapoint 3300 character font look like?

We know from the Datapoint 3300 Maintenance manual the characters were formed on a 5x7 grid, and on page 2-55 we have an "A". But is it known what the rest of the characters looked like? According ...
Lars Brinkhoff's user avatar
3 votes
1 answer
209 views

What do the DIP switches in a Perkin-Elmer 550 terminal do?

I have here a Perkin-Elmer “Bantam” 550 serial terminal. This terminal has a flap above the keyboard below which you can find a Baud rate selection slider, a switch for “transparent mode” (whatever ...
fuz's user avatar
  • 1,572
15 votes
1 answer
2k views

What is the history of the Intel 8275 video controller?

The highly popular at the time build-it-yourself home computer Radio 86RK, designed in the Soviet Union, contained a rather mysterious video controller chip КР580ВГ75. It had a high end, feature rich ...
h22's user avatar
  • 413
14 votes
6 answers
4k views

Using only one terminal, can I interrupt a process that's hung on very early Unix versions?

Within modern shells, I am able to leave a process via one of two control sequences: Usually Ctrl+C will directly send SIGINT to the majority of shell commands (e.g. ping, echo, cat) A few processes ...
natevw's user avatar
  • 2,937
0 votes
2 answers
289 views

Role of Termcap under contemporary unices

A word of caution regarding this question: I'm more a userland than kernel person but have this nagging concern which I think belongs to kernel. When configuring a system one decides on peripherals ...
MKhomo's user avatar
  • 447
5 votes
1 answer
209 views

Using MAI DT4315A as a terminal for RaspberryPI or other linux system

I have an old MAI DT4315A that my company was going to throw out. I'd love to get it setup as a terminal for a linux based system or raspberry pi, just for fun. However, I've never completed anything ...
SysChaos's user avatar
7 votes
1 answer
481 views

Does the TELCOM program on the Tandy Model 100 support any Unix terminal–like control codes?

I've been connecting my Tandy Model 100 to a serial port on a Linux box via the TELCOM program with some success. The main downside is that in whatever the default terminfo/$TERM setting it gets, a ...
natevw's user avatar
  • 2,937
103 votes
7 answers
46k views

Exactly what color was the text on monochrome terminals with green-on-black and amber-on-black screens?

I am wondering what were the color shades and brightness of the text appearing on classic monochrome terminals? If I were to recreate approximately the green-text-on-black-screen or amber-text-on-...
Basil Bourque's user avatar
1 vote
2 answers
514 views

ASCII ASA X3.4-1963 and Finite State Machines?

I'm reviewing the historical original ASCII standard. There are many control characters. Does anyone know the history of them and where finite state machines that made use of them may be documented? ...
Nick's user avatar
  • 141
12 votes
1 answer
823 views

Can I use the DEC VT220 composite output to connect it to a TV?

I have a DEC VT220 from 1986, it has a composite output. Works great in all its max-19200Kbps monochrome glory. The composite output plug is a BNC, and it looks like BNC-to-RCA composite jack ...
LawrenceC's user avatar
  • 1,199
6 votes
0 answers
138 views

Restoring a self-inking printer cartridge

I've seen people ask about restoring printer or typewriter ribbons, but my situation's a little different. I have a self-inking ribbon for a DECwriter Correspondent. It's easy to open up the casing, ...
Bob's user avatar
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