PAL/SECAM compatibility was not an issue on these machines as they could only output black-and-white video signals anyway. Maybe that fouled Lord Sinclair into neglecting SECAM on its following machine, the [[ZX Spectrum]].
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== Clones ==
*TS 1500, introduced in August 1983, it was a TS 1000 with 16 KiB RAM and a ZX Spectrum-like case and keyboard.
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== Links ==
*[https://youtu.be/qDorGWU1k3A Sinclair ZX81 - revolutionary or scam ?] [https://youtu.be/6eTGX_sEqPM ZXPAND+ ZX81's lethal weapon] [https://youtu.be/kTw8uo-53lc TOP 20 games for the Sinclair ZX81] by [[Olipix Retrotech]]
*[https://youtu.be/Liqd7ZoBVEI ZX80 - Histoire & Jeux] [https://youtu.be/GjHgIpHPgq4 Le mystère de l'ordinateur en bois] by [[Olipix]]
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[[Category:Non CPC Computers]]