Category Archives: Atari A/V Mods

Atari 7800 Video Sniffed

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.

A/V Install Guides

Guides for the Atari A/V Mods

Read through the instructions carefully before attempting. Also read the disclaimer.

Atari 2600

Kit Install Guides

Assembling a 2600 Kit. V2.2E
Assembling a 2600 Kit. V2.2F – Current Version

Schematic NTSC V2.2F
Part List NTSC V2.2F
Schematic PAL V1.0
Part List PAL V1.0

Atari 7800

Kit Install Guides

Assembling a 7800 Kit. V2.1

Schematic NTSC V2.1
Part List NTSC V2.1

Printout and Drill Template

Atari A/V Mods

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

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.

Comparison between stock RF and the mod on a 7800.

Different Modding Options.

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


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

Atari 2600 Video Mod V2.2D PCB