Secret colours of the Commodore 64
&gt; Sidebar: A note on frames per second. The European PAL C64 updated at 50fps, whereas the US NTSC systems updated at 60fps<p>This is because alternating current is 50Hz in PAL countries (eg Europe), and 60Hz in NTSC countries (eg America). Analogue TVs vertical refresh rate was synced to the AC frequency for a bunch of practical reasons, which meant gaming consoles had to send signals to the television at either 50Hz or 60Hz.<p>Result? Many PAL console games actually ran at 5&#x2F;6ths of NTSC speed. Most notoriously, Sonic the Hedgehog, whose agility was more sluggish (and soundtrack less vivacious) for a large fraction of the world. More information in this video: <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=cWSIhf8q9Ao" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=cWSIhf8q9Ao</a>