Steven Smith of ProjectSpeccy.com reverse engineered this interface as a reaction to prices he saw online for the original Mikro-Gen hardware. It’s not a very complicated piece, just an EPROM and an IC with a joystick connector at the top with a few diodes. The original is a single sided PCB and is routed for convenience (more of that later).

The components were laid out in a KiCad schematic and each connection traced until he had built up a complete schematic. He also took the opportunity to recreate the original logo to add to the board

Please note that the ROM on World of Spectrum will not work with this bpard because it has been descrambled for use with emulators. Thanks to Russ, Jerzy and Matthew Logue who supplied a ready-to-run scrambled ROM image which you will find on Stephens Website. You will also find the TZX files of the game for convenience and also an .MDR file for those lucky enough to have a vDrive ZX.

This project is shared here with the express consent of the designer Stephen Smith. We hope this project enables those who could never obtain the original or refuse to pay the ‘Retro’ prices demanded these days, to play the game as it was originally intended.

DIP sockets need to be low profile and the ZX Spectrum connector needs to be installed at the outer length of it's pins.

The correct ROM image can be found here: http://projectspeccy.com/Projects/SotU/ShadowOfTheUnicorn_Obfuscated_ML.ROM.zip

Happy Creating!