DivMMC Emulation
The DivMMC is a MMC interface for the Spectrum. Originally designed by Alessandro Dorigatti for the V6Z80P+ FPGA board as the fusion of DivIDE and ZXMMC+ interfaces, later assembled as an interface for real spectrums by Mario Prato. Currently there are variants with different RAM size, one/two memory cards slots, optional kempston jostick, etc.
The interface can be activated via the DivMMC interface option from the Peripherals preferences dialog, and the state of its EEPROM write protect jumper controlled via the DivMMC write protect option.
If you’re going to be using the DivMMC, you’ll need to load the ESXDOS firmware or use the ZX Spectrum +3e ROMs by Garry Lancaster.
You’ll also need a HDF image to store the contents of the memory card. There are several tools to create and manipulate this file format, e.g., hdfmonkey.