Design
The earliest demos were simple music players with music ripped from games and perhaps simple effects or text scrollers. Many later demos feature so-called 'multicolor' effects (changing the color attributes of the ZX Spectrum's display configuration of 768 character blocks), which have to be fixed to a specific ZX Spectrum model. Megademos, demos with more content, usually split into several parts, appeared in the beginning of 90's, with the advent of the The Lyra II by ESI. Most of the demos since 1996 have been "trackmos" (effects fixed to music), often featuring 3D objects, sometimes in low resolutions, to achieve more colours.
Read more about this topic: ZX Spectrum Demos
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