Rui CarmoThe Sinclair ZX81 was the first computer I ever owned:
With 1KB RAM and a wobbly 16KB external expansion, it was around three times as dumb as your modern digital watch.
Resources
| Category | Date | Link | Notes |
|---|---|---|---|
| Hardware | 2024 | ZX81 Mechanical Keyboard | a replacement keyboard for the ZX81 |
| 2026 | OpenSpand | RP2350-based expansion cartridge for Sinclair ZX81 computers and clones, compatible with ZXpand and providing expanded RAM, SD-card storage, high-resolution graphics, AY/YM audio, and optional Bluetooth input | |
| Software | 2026 | 1K ZX Chess | a documented rebuild and analysis of the classic 1K ZX81 chess program, including source commentary and buildable variants. |