A movie that makes a typewriter made in 1930 be a Linux terminal screen and drives ASCII art


A movie that makes a typewriter made in 1930 be a Linux terminal screen and drives ASCII art

You can type letters on paper by tapping the dialTypewriterWas widely used in business during the 19th and 20th centuries. I am doing a restore of a vintage computer with a movie that uses such a typewriter as a Linux terminal screenCuriousMarcHe has published it on YouTube.

Using a 1930 Teletype as a Linux Terminal-YouTube

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Mr. Curious Marc uses the typewriter of the model number "TG-7-B" as the terminal screen

It appeared in 1930 and was used for communication in the military until the 1960s.

The entered character is 5 bitsBaudotIt is encoded in the code …

The encoded characters are decoded by the electromagnet and printed on paper.

CuriousMarc first decided to create a mechanism to send characters from a computer to a typewriter. From typewriter materialsTransistorOrResistorConsider how to implement.

bread boardI mounted electronic parts on. A computer is connected to the "REC" side and a typewriter is connected to the "SEND" side.

Connect the serial data generator "HP 8018A" to the REC side and check the operation.

When you send a signal to a typewriter …

The characters have been printed.

Curious Marc as a computer with LinuxArduinouse.

ASCIISince it is necessary to convert the 8-bit signal input as a code into a 5-bit Baudot code signal and output it,EclipseMarc uses Arduino to program an Arduino.

Put the breadboard and programmed Arduino in the case, and attach the switches …

A box that can use a typewriter as a terminal is completed.

Also, since the typewriter supports only uppercase letters, Curious Marc is a control program for virtual terminals.agettyIs used to detect terminals with only uppercase letters.

Using agetty to connect a typewriter as a terminal to the Arduino serial port "/ dev / ttyS0" …

The login screen is displayed on the typewriter.

When I tried to login immediately, I received an error and could not login.

"Do you need sudo!", Says Curious Marc. Apparently it was necessary to have administrator privileges to execute agetty. If you add sudo to the beginning of the command and execute agetty …

Successful login.

Display directory …

Curious Marc enjoys displaying and displaying ASCII art.

With a typewriter, you can display all ASCII art that would not fit on a normal screen.

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