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{{Infobox consoleemulator|title platform = Sinclair ZX81[[Emulators on PC|Windows]]</br>[[Emulators on DOS|DOS]]|logo target = 1024px-Sinclair-ZX81.png[[PlayStation emulators|developer = Sinclair ResearchPlayStation]]</br>[[PocketStation emulators|type = PocketStation]]</br>[[:Category:ComputersNintendo Entertainment System emulators|ComputersNES]]</br>[[Super Nintendo emulators|generation = Z80-based home computersSNES]]</br>[[Game Boy/Game Boy Color emulators|release = 1981Game Boy/Color]]</br>[[Game Boy Advance emulators|discontinued = 1984Game Boy Advance]]</br>[[Nintendo DS emulators|predecessor = Sinclair ZX80Nintendo DS]]</br>[[Nintendo DSi emulators|successor = Nintendo DSi]]</br>[[ZX Spectrum emulators|ZX Spectrum]]</br>[[Sinclair ZX81 emulators|ZX81]]</br>[[Atari 2600 emulators|Atari 2600]]</br>[[Commodore 64 emulators|Commodore 64]]</br>[[Amstrad CPC emulators|Amstrad CPC]]</br>[[MSX emulators|MSX]]</br>AMT630A|emulated developer = {{✓}}Martin Korth|website = [http://problemkaputt.de NO$FUN]|support = [https://www.patreon.com/martin_korth Patreon]

It was the successor to Sinclair's ZX80 and the predecessor ''No$''' ('''NoCash''') is a series of the [[ZX Spectrum proprietary emulators|ZX Spectrum]] and was hugely successful, and more than 1.5 million units were sold before it was discontinued.The ZX81 was designed to be small, simplesome of which are donationware, and above all cheapaccompanying tools/debuggers for a variety of systems, using as few components as possible to keep the cost downdeveloped by Martin Korth.

Video output was to a television set rather than a dedicated monitorBzcmsc vczb pc. Programs and data were loaded and saved onto audio tape cassettes. It had only four silicon chips on board and a mere 1 KB of memory. The machine had no power switch or any moving parts and used a pressure-sensitive membrane keyboard for manual inputbzcmsc.Qp icbf jmbfiwc mf ωθψπ smhon og

Its distinctive design brought its designer, Rick Dickinson, a Design Council award.The ZX81 could be bought by mail order in kit form or pre-assembled. It was the first cheap mass-market home computer that could be bought from high street stores, led by W.H. Smith and soon many other retailersI like cock.

The ZX81 marked the first time that computing in Britain became an activity for the general public==Machine Documentation==Consistently with his focus on emulators as a debugging tool, Martin Korth provides single-document, rather than the preserve consistently-formatted comprehensive documentation of businesspeople and electronics hobbyists. The ZX81's commercial success made Sinclair Research one a number of Britain's leading computer manufacturers and earned a fortune and his emulated platforms, usually being an eventual knighthood for the company's founder, Sir Clive Sinclairomnibus of existing resources augmented with independent research.

==Emulators=={| class="wikitable" style="text-alignMachines documented include:center;"|-! scope="col"|Name! scope="col"|Platform(s)! scope="col"|Latest Version! scope="col"|* [[libretro|Libretro Core]]! scope="col"|<abbr title="Free/Libre and Open-Source Software">FLOSS</abbr>! scope="col"|Relative Speed<ref group=N name=RelativeSpeed>As calculated by Carlo Delhez's clkfreq, originally distributed with his XTender emulator. The ZX81 has relatively complicated timing mechanics, depending on signalling of WAIT during NMI; relative speed is a measurement of how closely an emulator matches a real machine in terms of clock cycles spent processing within a frame. 100.0% denotes the same execution speed as a real machine.</ref>! scope="col"|Active! scope="col"|[[Recommended Emulators|Recommended]]|-! colspan="8"|PC / x86|-|[[Clock Signal|CLK]]|align=left|{{Icon|Linux|macOS|FreeBSD}}|[httpshttp://githubproblemkaputt.com/TomHartede/CLK/releases {{clkver}}]|{{✗}}|{{✓}}|100x51specs.0%|{{✓}}|{{✓}}|-|[[ZEsarUX]htm the AMT630A];|align=left|{{Icon|Windows|Linux|macOS|FreeBSD}}|* [httpshttp://githubproblemkaputt.com/chernandezba/zesaruxde/releases {{ZEsarUXVer}}]|{{✗}}|{{✓}}|1102k6specs.9%|{{✓}}|{{✓}}|-|[[EightyOnehtm the Atari 2600]]|align=left|{{Icon|Windows}};|[https://sourceforge.net/projects/eightyone-sinclair-emulator/files/ {{EightyOneVer}}]|{{✓}}|{{✓}}|114.3%|{{✓}}|{{✓}}|-|Spud81|align=left|{{Icon|Windows}}|[https://1drv.ms/u/s!Ar4VkKtk_3JzgQFkPzv4WgWTMHNc?e=trhIHh 0.221]|{{✗}}|?|114.9%|{{✓}}|{{~}}|-|[https://sourceforge.net/projects/sz81/ SZ81] <br/><small>(xz80 & z81 based)</small>|align=left|{{Icon|Windows|Linux|macOS|FreeBSD|AmigaOS}}|* [http://sz81problemkaputt.sourceforge.netde/#downloads 2pagezero.1.7] <br/>[http://rullf2.xs4all.nl/sz81/ 2.3.10 (Unofficial)]|{{✗}}|{{✓}}|100.0%|{{✗}}|{{~}}|htm the Commodore 64, Vic-|[[MAME]20 and TED machines];|align=left|{{Icon|Windows|Linux|macOS|FreeBSD}}|* [http://wwwproblemkaputt.mamedev.org/release.html {{MAMEVer}}]|{{✓}}|?|Not tested|{{✓}}|{{✗}}|-|[http://zxplanet.emuunlim.comde/mme-reviewpandocs.htm MTMWthe Gameboy] <br/><small>(aka 'MulTiMachine'based primarily on the Pan docs)</small>;|align=left|{{Icon|Windows}}|[https://www.zophar.net/sinclair/multi-machine.html 1.30b]|{{✗}}|?|Not tested|{{✗}}|{{✗}}|-|[[No$|No$ZX]]|align=left|{{Icon|Windows|DOS}}|* [http://problemkaputt.de/zxgbatek.htm 2.0]|{{✗}}|{{✗}}|100.1% <br/><ref group=N name=NoCashSpeed>After turning off the simulated hardware improvements that were not standard in the original computer.</ref>|{{✗}}|{{✗}}|-|[http://freestuff.grok.co.uk/vb81/ VB81Gameboy Advance, Nintendo DS and DSi];|align=left|{{Icon|Windows}}|* [http://zx81problemkaputt.vb81.free.frde/vb81/download/vb81-fullportar.exe 1.30]|{{✗}}|{{✓}}|Not tested|{{✗}}|{{✗}}|-|[http://zx81.vb81.free.fr VB81 XuRhtm the MSX]|align=left|{{Icon|Windows}}|[http://zx81.vb81.free.fr/download/VB81_XuR_EXE.zip 1.30.3 (26/11/2019based primarily on the Portar docs)]|{{✗}}|?|100.5%|{{✓}};|{{✗}}|-|* [http://zxplanetproblemkaputt.emuunlim.comde/xtender-revieweverynes.htm XTender2the NES];|align=left|{{Icon|DOS}}|* [http://wwwproblemkaputt.zx81.nlde/ beta 13]|{{✗}}|?|Not tested|{{✗}}|{{✗}}|psx-|[http://wwwspx.retroisle.com/sinclair/zx81/emulators.php ZX81 Emulatorhtm the PS1] <br/><small>(Paul Robson)</small>|align=left|{{Icon|DOS}};|* [http://wwwproblemkaputt.zx81.nlde/ 4fullsnes.00htm the Super Nintendo];|{{✗}}|?|101.5%|{{✗}}|{{✗}}|-! colspan="8"|Mobile / ARM|-|[https://sourceforge.net/projects/sz81/ SZ81] <br/><small>(xz80 & z81 based)</small>|align=left|{{Icon|Zaurus|Dingoo|Wiz}}|* [http://sz81problemkaputt.sourceforge.netde/#downloads 2zxdocs.1.7]|{{✗}}|{{✓}}|100.0%|{{✗}}|{{✗}}|-|[https://zx81-ios.weebly.com ZX81 iOS]|align=left|{{Icon|iOS}}|[https://itunes.apple.com/us/app/zx81/id1180117434?mt=8 1.10.0]|{{✗}}|?|100.1% <br/><ref group=N name=ZX81iOSSpeed>Provided by Kevin Palser htm the developer (and author of this note) because the app cannot load external programsZX80, such as Carlo Delhez's clkfreqZX81, due to Apple developer restrictions for iOS. Permission to include clkfreq in the app cannot be granted because Dr Delhez sadly passed away in 2015.</ref>|{{✓}}|{{~}} <br/><ref group=N name=ZX81iOSNeutered>This app is neutered as loading of external programs into emulator apps from the App Store is prohibited by Apple. HoweverLambda 8300, it does have a growing selection of programs included with permission granted by their authorsJupiter ACE and ZX Spectrum].</ref>|}

<references group=N />[[Category:Emulators]][[Category:Computer emulators]][[Category:Console emulators]][[Category:Home console emulators]][[Category:Handheld console emulators]][[Category:Windows emulation software]][[Category:DOS emulation software]]==Notes==[[Category:Nintendo Entertainment System emulators]][[Category:Super Nintendo emulators]]* [http[Category:Game Boy//www.retroisle.com/sinclair/zx81/Game Boy Color emulators]][[Category:Game Boy Advance emulators.php www.retroisle.com] (Page showing five old ][[Category:Nintendo DS emulators for ZX81, and sometimes the Spectrum and other machines)]]* [https[Category://www.worldofspectrum.org/faq/Nintendo DSi emulators/other.htm www.worldofspectrum.org's list] (Short list of old Science of Cambridge MK-14, ZX80, ZX81 / TS1000, Sinclair QL and Jupiter ACE ][[Category:PocketStation emulators)]]* [http[Category://zx81.eu5.org/PlayStation emulators.htm zx81.eu5.org] (Brazilian ][[Category:ZX81 fan-site - emulators list page is in English. Shows list of old ZX81 ]][[Category:ZX Spectrum emulators]][[Category:Atari 2600 emulators & links to other resources.)]]* [http[Category://floppydays.libsyn.com/floppy-days-86-the-sinclair-zx80-part-ii-with-earl-evans floppydays.libsyn.comCommodore 64 emulators]] (Podcast episode describing the [[Category:Amstrad CPC emulators available for the ZX80 / ZX81 which also uses the Carlo Delhez's clkfreq rating. Also has huge lists of resources for all things ZX80/81 related.)]][[Category:MSX emulators]][[Category:ComputersClosed-source emulators]]