Coleco ColecoVision Expansion Module No. 1 (Atari 2600 Adapter)

The Coleco ColecoVision was already graphically superior to the Atari 2600 and had a range of near arcade quality arcade clones written by heavy hitters such as SEGA and Konami.

Wanting to take a bite out of Atari's giant game market share Coleco created an adapter that enabled the ColecoVision to run Atari's 2600 ROM cartridge software range.

Atari challenged this in court but as Coleco had made their adapter with off the shelf components and none of the same core components used by Atari, Coleco was awarded victory making the ColecoVision with the Expansion Module No. 1 attached very attractive system.

It's a surprisingly complex little chunk which at quick inspection looks like a kit built Atari 2600 with a pass through that connects to the ColecoVision's ROM cartridge port. As it wasn't an integrated module users had to unplug the game pads from the ColecoVision and plug them into the Expansion Module No. 1 to play the games.

ColecoVision Expansion Module No. 1 ColecoVision Atari 2600 Adapter
ColecoVision Expansion Module No. 1 Motherboard ColecoVision Atari 2600 Adapter PCB      
 
Unit pictured has been sold and its location is unknown.