Machines › Home Computers › Sinclair › Sinclair ZX81
Sinclair ZX81
1981
Sinclair's 1981 low-cost Z80 home computer, a huge seller that introduced many Britons to programming.
Sinclair ZX81 Online Emulator
Play Sinclair ZX81 using JavaScript directly in your browser.
Controls
Boots straight to the ZX81 BASIC "K" cursor (© 1981 Nine Tiles / Sinclair Research ROM). Type ZX81 BASIC — single-keyword entry, so pressing P enters PRINT. Click the screen first so it captures the keyboard; on mobile use the on-screen keyboard. Open the debugger to single-step the Z80, read and write the registers and memory, and set breakpoints.
Configurations
| Configuration | Emulator | Machine | OS | Legal | |
|---|---|---|---|---|---|
| ZX81 BASIC | ZX81 | Sinclair ZX81 | grey | Open ⛶ |
Chips
Emulators
| Emulator | Type | License | Site |
|---|---|---|---|
| EightyOne | downloadable | GPL-3.0 | Website ↗ |
| ZEsarUX | downloadable | GPL-3.0 | Website ↗ |
| ZX81 | online | GPL-3.0 | Website ↗ |
| sz81 | downloadable | GPL-2.0 | Website ↗ |
| zxsp | downloadable | BSD-2-Clause | Website ↗ |