40 Years after the Sinclair ZX81 was released this project aims to preserve the first 4 chip computer

This a computer presevation project for the Sinclair ZX81.

Features (Hopefully).

• Drop in replacement for a ZX81
• Built in 16K+ RAM, no need for a RAM Pack
• Built in Composite Video Output
• Barrel Jack power input, center Positive
• OPTION: Single Joystick port (not compatible with quickfire etc.)
• OPTION: Switchable to 1K RAM
• OPTION: Back Porch Support for early ULAs
• OPTION: Built in support for ZX-Wespi
• OPTION: ZON-X Compatible Yamaha YM2149F Based Sound
• OPTION: Switchable between Sinclair ROM OR AT28C256 EEPROM
• OPTION: 16 Pin Box Header for DK'Tronics Keyboard