- 1-56KiB of RAM with software configurable mapping and size.
- MicroSD card storage with transparent LOAD/SAVE integration.
- Embedded support commands in an overlay ROM for instant availability.
- Supports pseudo high resolution graphics.
- Supports true high resolution graphics, WRX.
- Supports user defined characters, CHR$64 or CHR$128.
- Dual emulated AY-3-8910 or YM2149 sound chips, model selectable.
- Sampled stereo audio output via the LEDs.
- Joystick connector, standard 9-pin ATARI compatible. Several modes of reading. Also sends data via keyboard injection.
- Serial IO via extension connector. Connect to RS232-buffers, MIDI-buffers or Serial2USB module.
- ROM selectable: ZX81, ZX80, ZX80 ZXpand, ZXpand+ or Big Bang X2 .
- A button to control soft, hard and factory reset.
- A button to enter the config menu.
- Configuration options via ZX81 keyboard & screen.
- Composite video output.
- Battery backed real-time clock with date and time.
- Firmware update via USB.
- Open source hardware and software!
The hardware design and software will be published as open source when closer to complete.