Understanding Your ZX81 ROM

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The ZX81, launched in 1981 by Sir Clive Sinclair, revolutionized home computing as an affordable entry point for the public, selling over one and a half million units. Its DIY assembly option appealed to many, fostering a community of enthusiasts eager to explore its capabilities. Users could easily share their programs via audio cassette, enhancing collaboration and innovation among hobbyists. The machine's success also led to numerous unauthorized clones, particularly in Eastern Bloc countries, highlighting its widespread impact on the computing landscape.