Ramtop's Retro Devices Homepage

ElkSD64
Electron SD Interface

Low-cost, high compatibility SD card interface and 64K memory expansion for the Acorn Electron.

ElkSD128
Electron SD Interface

Advanced, high-performance SD card interface for the Acorn Electron. Featuring 128K RAM and a 9-pin joystick port.

ElkSD-Plus 1 (rev 2)
Electron SD cartridge

SD card interface and 16K RAM expansion cartridge for the Acorn Electron fitted with the Acorn Plus 1 expansion box.

MasterSD
BBC Master SD Cartridge

SD card interface cartridge for the Acorn BBC Master, designed for high perfofmance and simple installation.

Plus 1 Mini Expansion Unit

A modern alternative to the original Acorn Plus 1, featuring cartridge slots, SD card interface and more.

Open-Source Turbo Card

A modern turbo card for the Acorn Electron, fully open source. Up to 3.3x faster than a stock Electron.

EMRAM32 Sideways RAM
Cartridge

SD card interface cartridge for the Acorn BBC Master, designed for high perfofmance and simple installation.

Legacy Devices

These devices have been discontinued and replaced

MicroSD Interface Mk1

The very first device I ever sold for retro computers.

MicroSD Inteface Mk2

A slightly improved version of the previous Mk1 interface.

SD Interface Mk3 / ElkSD32

Immediate predecessor of the ElkSD64, my first attempt at something that didn't look like a hobby project!

ElkSD-Plus 1 (rev 1)
Electron SD Cartridge

The original version of the ElkSD-Plus 1, retired in favour of the higher performance rev 2 version.