I have started a new project to create an Open Source Colecovision in FPGA. This project is based on the ZX-Uno (http://zxuno.speccy.org/ ). There is a colecovision core that has already been ported to that board, although it is missing several features. The idea of this board is to create a new colecovision board that will accept original controllers and play cartridges (as well as off of a sd card).
The FPGA source code is located at:
The board will be created using altium's circuitmaker. This is a free software that allows collaborative development of pcbs.
If anyone would like to participate and contribute to this let me know and I can add you to the project.
This is still very early in the development, so it could be a little while before this is ready.
Edited by Bmack36, Wed Dec 21, 2016 12:40 PM.