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|generation = Z80-based home computers
→Emulators
|developer = Sinclair Research
|type = [[:Category:Computers|Computers]]
|release = 1981
|discontinued = 1984
|predecessor = Sinclair ZX80
|successor = [[ZX Spectrum line|ZX Spectrum]]
|emulated = {{✓}}
The ZX81 was designed to be small, simple, and above all cheap, using as few components as possible to keep the cost down.
Video output was to a television set rather than a dedicated monitor. Programs and data were loaded and saved onto audio tape cassettes. It had only four silicon logic 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 input.
Its distinctive design brought its designer, Rick Dickinson, a Design Council award.
==Emulators==
<div style="max-width:100%; overflow:auto;">
{| class="wikitable" style="text-align:center;"
! scope="col"|Name
| {{✓}}
|-
| [[EightyOne]](81)
| align=left|{{Icon|Windows}}
| [https://sourceforge.net/projects/eightyone-sinclair-emulator/files/ {{EightyOneVer}}]
| {{✓}}
| 114100.30%
| {{✓}}
| {{✓}}
| [http://zx81.vb81.free.fr VB81 XuR]
| align=left|{{Icon|Windows}}
| [http://zx81.vb81.free.fr/download/VB81_XuR_EXE.zip 2113/0508/2022]
| {{✗}}
| 100.5%
| {{✓}}
| {{~}} <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. However, it does have a growing selection of programs included with permission granted by their authors.</ref>
|-
! colspan="8"|Consoles
|-
| DS81
| align=left|{{icon|NDS}}
| [https://www.gamebrew.org/wiki/DS81 1.3]
| {{✗}}
| Not tested
| {{✓}}
| {{✗}}
| {{✓}}
|}
</div>
<references group=N />
* [http://zx81.eu5.org/emulators.htm zx81.eu5.org] (Brazilian ZX81 fan-site - emulators list page is in English. Shows list of old ZX81 emulators & links to other resources.)
* [http://floppydays.libsyn.com/floppy-days-86-the-sinclair-zx80-part-ii-with-earl-evans floppydays.libsyn.com] (Podcast episode describing the 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.)
* [http://www.robotsandcomputers.com/computers/manuals/zx81_sch.jpg] (Schematic) There was also an ASTEC RF modulator and a voltage regulator.
[[Category:Computers]]
[[Category:ZX81 emulators|*]]
[[Category:Z80-based]]
