RISC OS Pyromaniac IIC PCF 8583 communication

by gerph 2 years ago

macOS ◆ xterm-256color ◆ fish 805 views

RISC OS Pyromaniac provides an implementation of the NVRAM / clock chip which is accessible over IIC. It’s simple enough to read the time.

The recording shows a simple BASIC program changing the address that we’ll read from, and then reading the time - it’s April 27th, at 11:47pm when the recording was made.

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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 490582.cast

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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/490582.cast',
      document.getElementById('player'),
      { cols: 100, rows: 20 }
    );
  </script>
</body>
</html>

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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/490582 demo.gif

Or, if you already downloaded the recording file:

agg demo.cast demo.gif

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See agg manual for full usage instructions.