Rasterbars are a common special effect on early computer games and demos. The Commodore Amiga's take on rasterbars are special due to the Copper, a special processor that synchronizes its activity to your monitor's image rendering hardware.

Thanks to Tyrel (@tyrel@social.tyrel.dev)!

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References

Documentation:

• Amiga Coprocessor Docs (http://amigadev.elowar.com/read/ADCD_2.1/Hardware_Manual_guide/node0047.html) - Commodore's official documentation on the Copper

Examples:

• Code examples on Hackerbun (https://code.hackerbun.dev/TheIndustriousRabbit/amiga-agnus-copperbars) - The code I wrote for the example copperbars in the video, written in C
• Copperbars in Assembler (http://vikke.net/index.php?id=copperbars-1) - Another description and demo for building copperbars, this one in Assembler

Credits

• "Funin and Sunin" by Kevin MacLeod https://incompetech.com CC-BY 3.0 (http://creativecommons.org/licenses/by/3.0/)