The 3D simulator that faithfully reproduces the computer 'IBM 1401' that was active all over the world more than 60 years ago is amazing
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The IBM 1401 datacenter simulator --experience 1960's mainframe programming
https://rolffson.de/
You can see what the IBM 1401 datacenter simulator really looks like by watching the movie below.
IBM 1401 let's program, part 1: overview --YouTube
This is the IBM 1401 reproduced in 3D. It is said to be one of the world's first mass-produced computers, with 12,000 units sold to companies around the world. The IBM 1401 was a computer developed during the transitional period of recording media, and was able to use both the magnetic tape, which was still new at the time, and the punch card, which was the mainstream at the time.
A punch card is a medium that can record information based on the position and presence of holes punched in paper. Of course, there is also a punch card writer for creating punch cards.
The created punch cards can be arranged on the tray.
The magnetic tape drive looks like this. You can see how the magnetic tape rolls inside and the dripping magnetic tape is read.
Of course, the magnetic tape is replaceable.
Punch card reader (left) and central arithmetic unit (right)
To the right of the central arithmetic unit ...
And a printer that outputs the calculation results.
In the following movie, you can see how the command statement is typed with the punch code, the punch code is loaded, and 'HELLO WORLD' is output from the printer.
Type in a command with a punch card ...
Set it in the punch card reader.
Press 'LOAD' to load the contents of the punch card.
On the control panel of the central arithmetic unit, set the dial to 'RUN' and press the 'START' button ...
The letters on the top panel flash.
Then the result is output from the printer.
'HELLO WORLD' was printed on the paper of the printer.
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