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Help Identify Atari 2600 Y-cable?

posted Dec 11, 2009, 5:02 AM by Troy Cheek   [ updated Dec 11, 2009, 5:05 AM ]
From the AtariAge forums:

"i recently found a atari 2600 y cable in a box of controllers and rf cables. This cable has no markings by any company, both ends of the Y have male 9-pins. The end of the y-cable is a small enclosure about 2-3 inches long and about an inch and a half across, it also has three screws holding the box together with a female 9 pin at the end of the box. What is this cable and what is it for. I have 2 wico y-cables for my 5200 neither are similar to this one. please tell me what this cable was intended for."

One suggestion:

"That sounds almost like an Atari joystick adapter for the Texas Instruments 99/4A computer. Bill Loguidice has a picture of one on his website. The 99/4A used one male DB-9 port for two joysticks, which were not compatible with Atari's joysticks. Since most people preferred the Atari sticks, several companies made adapters which allowed you to plug two Atari-compatible joysticks into the 99/4A port. If I remember correctly, the enclosure portion of this cable contains a small circuit board with some diodes and a capacitor on it, which is why it isn't molded like the other ends."