This RGB mod by Yannick Erb was made to work with three different consoles:

• VideoPac including BG Color Fix
• Intellivision only model with LM1886N
• Atari 2600

I wanted to try this RGB mod even though i am the man who created the ZOE RGB way back in 2013 for Intellivision but on my Intellivision i still had the rough prototype of the mod installed and since i no longer time to assemble a new ZOE RGB interface for Intellivision i have decided to try this one by Yannick which is basically identical to my interface.

I configured the RGB mod to work with Intellivision, there are some jumpers to configure, everything worked at first try the image is clear and stable thanks also to a small trick that this mod includes, a capacitor on the SYNC line that makes the image more stable in some situations.

I also took advantage of completely removing the RF modulator (absolutely useless) and in the hole of the antenna plug i fixed a DIN connector for the RGB / Audio output and SCART Switching, i also replaced the flat of the power cable of the intellivision motherboard because it had completely disintegrated.

Below you will find the usual photo gallery and the download of the GERBER + the files needed to assemble the PCB by JLCPCB.

Gallery:

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Download: GERBER + Files needed to assemble the PCB by JLCPCB (0)

Project Homepage: https://oshwlab.com/yannick.erb/Intellivision-Secam-to-RGB_copy

I installed the ZOE RGB rev 2.0 interface for a friend, this interface allows you to view the images with an RGB output signal with a much better quality instead of the only output supplied as standard which is RF.

This interface was purchased by me many years ago and was the last batch of the ZOE RGB rev v2.0 that i had assembled.

After several years i can confirm that the image quality is perfect and clear.

Gallery:

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I wanted to upgrade another Philips Videopac G7000 console and adding everything i wanted to do many years ago when i only added the RGB output instead of the RF one.

While i was doing the work of modifying the console i realized that something was wrong with the games and the RGB output, some games were missing the background color or the color was faded, other times the colors are wrong, but this defect was not present with all games and therefore it was not a wiring problem (colors are not swapped likes a problem with the R-G-B wiring).

I had never realized it and probably other people have never realized it either, because it does not happen with all the games but thanks to the Flash Multicart by Andrea Ottaviani i was able to try all the software released for the G7000 and confirm that something was not working correctly.

The problem is due to the type of RGB mod, i had taken the one from the gamesx.com site as good, that is the one that has been available from about fifteen years and that almost everyone has installed but there is another mod that is completely different and above all uses a particular pin of the Intel 8048 CPU (pin 39 [T1]).

Hesitantly i wanted to try this modification and it is actually all true, it works, now the RGB mod is perfect as for the Videopac G7200 (native with RGB output) and G7400 (Native RGB by adding the components that are missing on the PCB)

Later i discovered that this RGB mod was not born like this by chance, the scheme was designed taking inspiration from the original schematic of the G7200/G7400 where this particular CPU pin is used.

Below is the list of all the modifications and enhancements that have been made:

• RGB Mod 100% Working with a extra pin from CPU (No more missing background or colors via RGB on G7000)
• External RGB DIN Hirschmann Connector.
• Power external Switch with Power-On Light.
• Power external Connector.
• Two Joystick D-SUB external Connector.
• Replaced the original PSU with a Mean Well EPS-15-5.
• RF modulator removed.
• Simple Composite Video signal amplification circuit.
• Separate composite Video and Audio output via external RCA connectors.

Gallery of the work done:

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…and now some links:

https://forum.system-cfg.com/viewtopic.php?f=18&t=10673
https://gamesx.com/wiki/doku.php?id=av:g7000_av
https://darius-saturn.com/forum/viewtopic.php?t=8342
https://www.pimparts.fr

Available for sale the ZOE RGB rev 2.0 interface for Mattel Intellivision.

The Zoe interface lets you connect the PAL Mattel Intellivision console to a TV/monitor through the RGB signal of a SCART connector, dramatically increasing the quality of the video signal and bringing it to the highest possible quality: the original output is a modest RF/Antenna signal.

The interface is connected in place of the National LM1886 IC (TV Video Matrix DAC) to take the RGB and Sync signals and convert them for the SCART output.

Below some examples of video quality using a Sony PVM9041QM CRT Monitor and a Sony KD-49XD8305

The ZOE rev 2.0 interface is tested individually piece by piece before shipment.

The assembled kit is available and you can buy it now from ebay or privately (An installation service on the console will be available for less experienced users)The kit includes:

• 1 x ZOE rev 2.0 pcb with 3 bioadhesive supports.
• 1 x Dupont connector to the 8-pin DIN female panel socket (30cm long)
• 1 x Flat cable to connect the ZOE RGB to the socket of the LM1886  (19cm long)
• 1 x SCART Cable to 8-pin DIN male (2mt long)
• 1 x Audio cable with dupont connector from one end and to solder on the other side (30cm long)
• 1 x Precision IC Socket to replace the LM1886.
• 2 x Screws to fix the 8-pin DIN female.

Video test (Italian Only):

The video was made by a friend Vincenzo Sinceri.

If someone wants to remake the din-scart cable (example: more length), this is the pinout:

Download: Zoe RGB rev 2.0 Interface Installation Manual (English/Italian) (1219)

If you have problems to viewing in the correct way the manual in PDF format click here for the instruction how to configure the Adobe Acrobat Reader.

Details:

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I have found this RGB mod for the Philips Videopac G7000 console fom the gamesx site and i have decided to build the circuit to see if it works.

This mod is not easy to do, especially if one has no experience in electronics, however the result at the end is spectacular.

RGB DAC Schematics (click to zoom):

Download: Philips VideoPac G7000 Schematics (1962)

source: gamesx.com

Details:

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Jump here for the commercial RGB mod for the Mattel Intellivision

I have found this RGB mod for the Mattel Intellivision console fom a site, i have searched on the net if anyone has tried this mod, but nothing, so, i have tried to do it myself.

This mod is not easy to do, especially if one has no experience in electronics, however the result at the end is spectacular.

Schematics (click to zoom):

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This is a Video RGB Hack for the console Sega SG-1000 II (Mark 2).

The Sega 315-5066 Video Chip inside the Sega SG-1000 II (Mark 2) used in the latest version of the console uses two video output formats: NTSC Composite video (converted to RF), and RGB (not connected).

The RGB Video is the stuff from which all other formats are born. Once your RGB is tapped it can be easily converted to Component or S-video, giving stunning output far superior to what the Sega SG-1000 II natively offers (only RF).

There are several caveats, of course. The biggest is the quality of the RGB output – it’s not very bright, and will result in an image without much contrast, so you will probably need to add an amplifier. Even on monitors that display a very good image without the amp you’ll sometimes find the sync signal needs an amp to generate a stable image.

I have used the same RGB/Sync Amplifier used on the PC-Engine, components and the Original schematic are shown below.

Schematic:

Components:

• 4 x 2SC1815 (Transistor)
• 4 x 220 μF 16v (Electrolytic capacitor)
• 4 x 10 μF 16v (Electrolytic capacitor)
• 4 x 75 Ω (Resistor)
• 8 x 10 KΩ (Resistor)
• 1 x 300 Ω (Resistor)

The three photos below show the connection between the RGB Amplifier and the PCB of the Sega SG-1000 II.