[[File:Sinclair ZX80.jpg|thumb|right|Sinclair ZX80]]
[[File:Sinclair-ZX81.png|thumb|right|Sinclair ZX81]]
[[File:Timex Sinclair 1500.png|thumb|right|Timex Sinclair 1500]]
The Sinclair ZX80 and ZX81, introduced in 1980 and 1981, are early budget microcomputers notable for their price, fleeting popularity and diminutive quantity of components.
A substantial disadvantage of the design of these machines is that because the refresh cycle is commandeered for other purposes, they're built around an assumption of static RAM. As a result, each shipped with only 1kb at launch and expansions beyond 16kb were rare.
There was no PAL/SECAM compatibility was not an issue on these machines as they could only output black-and-white video signals anyway. Maybe that fouled fooled Lord Sinclair into neglecting SECAM on its following machine, the [[ZX Spectrum]]. <br> == Clones == Timex Sinclair was a joint venture established between Sinclair Research and Timex Corporation in an effort to gain an entry into the rapidly growing early-1980s home computer market in North America. They produced 2 modified versions of the ZX81:*TS 1000, introduced in July 1982 and essentially a modified ZX81 with 2 KB RAM.*TS 1500, introduced in August 1983, it was a TS 1000 with 16 KB RAM and a ZX Spectrum-like case and keyboard. <br>
== Links ==
*[https://youtu.be/1Jr7Q1yJOUM Documentary - The Sinclair ZX80, ZX81, and Timex Sinclair 1000] by [[The 8-Bit Guy]]
*[https://youtu.be/spxAQkTzvDQ Sinclair ZX81 (Timex 1000) Grandaddy of Computers] by [[Nostalgia Nerd]]
*[https://youtu.be/Liqd7ZoBVEI ZX80 qDorGWU1k3A Sinclair ZX81 - Histoire & Jeuxrevolutionary or scam ?] [https://youtu.be/qeKSV1GT6Nw 6eTGX_sEqPM ZXPAND+ ZX81 - Machine révolutionnaire ou grosse bouse ?'s lethal weapon] [https://youtu.be/vOT6kFy1uyY Le kTw8uo-53lc TOP 20 des meilleurs jeux pour 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]] <br>
[[Category:Non CPC Computers]]