I have been wanting to do this for awhile but have not gotten around to it. I took my Open Bench Logic Sniffer and sniffed the e (in picture from top to bottom) of the Atari 7800 MARIA chip. This is what the signal looks like before it goes into the video mod (D/A converter).

I am still learning how this translates into a picture on the screen. If anyone has any insight into this let me know.

You’re not getting old. Thats RF fuzz! – SOLD OUT – NOW OPEN SOURCE

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I used to offer a variety of A/V mods choices for the Atari 2600 and Atari 7800 consoles. The modification adds a S-video and composite video output to the Atari along with Stereo sound. The mods where very easy to install. If you can solder a wire you could install these kits.

Different Modding Options.

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• Fully Assembled Mod Kits are all put together and ready to be soldered into the Atari.
• Unassembled Mod Kits include all the parts needed to build the kit.
• Blank PCBs are just the bare PCB. No other parts are provided.
• Atari Modding Service includes the mod and all parts. You ship the Atari to me and I will install the kit. I also offer a “Deluxe” Service which includes gold plated jacks. These jacks are not offered on the kits.
• If you are a DIYer then the schematic is FREE.

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The install guides to the mods can be found here.
All FreePCB Files can be found here.

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Reviews

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Ben Heckendorn’s Video Review of the 2600 mod: Link
Garner’s Video Review of the 2600 mod: Link
Chris Kennedy’s Review of the 2600 mod: Link