8-bit input/output (GPIO) expansion card with a pass-through connector and a RESET button. Each card can be assigned an I/O port address from 0–255 using an 8-position switch. The I/O Port is the main platform for connecting MUMIO devices.

Joystick interface, compatible with the Kempston standard. It is used to connect a Kempston standard joystick (compatible with Atari / Atari 2600) to a ZX Spectrum computer. The board also features an auxiliary micro-joystick with two buttons.

Real-time clock (RTC). Compatible with esxDOS and mass storage modules: devSD, devMMC, devIDE, Just NANO SD. It allows programming and reading time using BASIC. The card comes with an esxDOS driver: RTC.SYS – enabling correct time to be saved when…

The device enables communication between the ZX Spectrum computer and external peripherals using the most popular communication interfaces used in automation: UART (RS-232), SPI, I2C, and USB. With this interface, you can connect most devices designed for Arduino to the…

External diagnostic ROM for the ZX Spectrum computer, equipped with an EPROM 27C512 chip with a capacity of 64 kB (4 × 16 kB). It allows running four different ROM versions on the computer instead of the originally built-in one.…