Acorn Electron ElkSD64 review

Video describing the ElkSD64 expansion cartridge for the Acorn Electron to add and SD card slot, 16K of sideways RAM and 16K of sideways ROM (+ another 16K of each for the MMFS filing system to support the SD card).
Includes an explanation of how sideways memory works on the Acorn Electron and BBC Micro series, as well as the rest of the memory map.