Demonstrating a somewhat tacky invocation of Twin from BASIC.

by gerph 5 years ago

macOS ◆ xterm-256color ◆ fish 992 views

The ‘TWIN’ editor was able to edit a BASIC program left in memory, and then return to BASIC afterward. It was a very limited tool.

An incredibly simple implementation of a command in a pymodule provides the ‘Twin’ command, and invokes an editor (‘nano’) on the BASIC program. Then on return from the edit, BASIC re-invoked to load the edited file. It’s really not that good, and it seems to - more often than not - lose the program that you were editing. However, it does show that interaction between the host system and the emulated one is relatively easy.

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You can download this recording in asciicast v2 format, as a .cast file.

Download

Replay in terminal

You can replay the downloaded recording in your terminal using the asciinema play command:

asciinema play 261697.cast

If you don't have asciinema CLI installed then see installation instructions.

Use with stand-alone player on your website

Download asciinema player from the releases page (you only need .js and .css file), then use it like this:

<!DOCTYPE html>
<html>
<head>
  <link rel="stylesheet" type="text/css" href="asciinema-player.css" />
</head>
<body>
  <div id="player"></div>
  <script src="asciinema-player.min.js"></script>
  <script>
    AsciinemaPlayer.create(
      '/assets/261697.cast',
      document.getElementById('player'),
      { cols: 93, rows: 26 }
    );
  </script>
</body>
</html>

See asciinema player quick-start guide for full usage instructions.

While this site doesn't provide GIF conversion at the moment, you can still do it yourself with the help of asciinema GIF generator utility - agg.

Once you have it installed, generate a GIF with the following command:

agg https://asciinema.org/a/261697 demo.gif

Or, if you already downloaded the recording file:

agg demo.cast demo.gif

Check agg --help for all available options. You can change font family and size, select color theme, adjust speed and more.

See agg manual for full usage instructions.