TV broadcast overlay using a ZX Spectrum

Interesting historical note of a TV broadcast hacked to feature an overlay of the Polish Solidarity movement, done using a ZX Spectrum.

https://idlewords.com/2007/04/tv_solidarity.htm

On September 14, 1985, residents of the Polish city of Toruń watching the popular James Bond ripoff 07, Call In (in which a blond and ideologically correct Citizen’s Militia officer fights crime from within a series of tight sweaters) were surprised to see the show briefly overlaid with block white letters reading “Solidarity Toruń: Boycotting the election is our duty,” and “Solidarity Toruń: Enough price hikes, lies, repression”. Twelve days later, the same slogans appeared superimposed on the hated evening news. The dissident radio astronomers had struck again.

Here’s an image of the overlay broadcast equipment used taken from the website:
image

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