A real-time clock designed for the ZX Spectrum as an internal clock with current date and time. The time is battery-backed and operates with one-second accuracy. With the RTC, you can easily track time or control automation that relies on time-based switching. File creation times on the SD card by the esxDOS system will also match the current clock time. You can read the time in BASIC using the IN command and then use it in your program.

Example of using the .date function in BASIC:

Compatible with esxDOS and mass storage modules: devSD, devMMC, devIDE, Just NANO SD. It allows you to program and read the current time using simple IN and OUT commands in BASIC.

It comes with a driver for the esxDOS system: RTC.SYS, which enables correct file timestamps and the use of the esxDOS system’s .date command.

The device is supplied with a CR2022 battery, pre-programmed with the current time.

Note!
For proper operation, the device must be mounted on the I/O Port card – MUMIO dev. #00.

WHAT IS MUMIO?
MUMIO is the equivalent of Arduino peripheral devices, adapted for control from a ZX Spectrum computer. These can include sensors, displays, motors, servos, relays, joystick interfaces, clocks, UART, USB, I2C, SPI interfaces, and many, many more… MUMIO devices are installed on an I/O card (dev. #00), connected to the ZX Spectrum’s edge connector.

Read more about MUMIO on the website: https://mumio.dev

PDF DOCUMENTATION:
https://mumio.dev/wp-content/uploads/2023/03/02_RTC_PL.pdf

MORE INFORMATION ABOUT THE DEVICE:
https://mumio.dev/real-time-clock-dev-02/