Assembling with JFPatch from Darwin

by gerph 5 years ago

macOS ◆ xterm-256color ◆ fish 975 views

Pyromaniac is now sufficiently mature that it can do useful things. In this example, the JFPatch assembler - an assembler that only exists as a wrapper around the RISC OS BBC Basic assembler, which I never re-wrote - is invoked to assemble a file.

This is actually running Pyromaniac within a docker container with a bind mount. Strictly it could be run directly on the system, but it isolates the damage that might happen by running in a container with only access to the working directory.

The recording shows what the file being assembled is, then invokes the assembler wrapper command, which runs docker to execute pyromaniac with JFPatch, passing the file. Once complete, we show that a utility (type FFC) has been created, and then we show a dissassembly of it, to show that it’s really ARM code (the armdiss tool is just part of my university project; not relevant to the pyromaniac project). Finally, we show the jfpatch shell script that was used.

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

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Replay in terminal

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

asciinema play 281111.cast

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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/281111.cast',
      document.getElementById('player'),
      { cols: 102, rows: 42 }
    );
  </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/281111 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.