+grips03 Posted December 23, 2016 Share Posted December 23, 2016 Has anyone tried this O2 mod? from: http://videopac.nl " The RGB output circuit has been copied from the Videopac G7200 console. It's the circuit that is enclosed in the red line in the schematic below.The signals of this circuit with the numbered red dots should be connected to the corresponding numbered red dots in the schematic of the Odyssey2 console below. For dots 5 and 6 an inverter should be inserted before connecting them (74LS04). http://ozyr.com/rene/Download/G7200_rgb.jpghttp://ozyr.com/rene/Download/odyssey2_schematic_rgb.jpg " If yes, can you help answer the questions below. Between IC653 and IC652 there is a vertical black line. Is this to denote a header to G7200's CRT and hence is not needed for O2 RGB board? Does IC653 pin 11 connect to IC652 pin 9 and pin 13?Does IC653 pin 8 connect to IC652 pin 3 What does "&" mean inside of IC653?What does "1" mean inside IC652?I assume IC656 is not needed as its not in the red area, does that sound right? I think these two are related to SCART pin 8/select and pin 16/blanking. Do you agree?Are D698 and R749 needed? If it is needed where does one pick up +2v. Signal name is Status CVBS. Perhaps this is optional.Is R723 needed, this appears to be a resistor connected to +5v, signal name is Status RGB. Perhaps this is optional. IC652 is 7407 IC653 is 74LS08 IC656 is 74LS08 Quote Link to comment Share on other sites More sharing options...
+grips03 Posted December 23, 2016 Author Share Posted December 23, 2016 Parts list: R751 100 ohm R774 180 ohm R738 470 ohm R736 560 ohmR737 560 ohmR735 560 ohm R773 680 ohmR747 1k5 aka 1.5K ohmR746 1k5R748 1k5R733 4k7 aka 4.7K ohmR772 4k7 C854 10nf aka 10000pf or .01uf .1 or 2.54mm spacedC852 10nfD696 1N4148 DO-35D693 1N4148D694 1N4148D695 1N4148D692 1N4148D697 1N4148 74LS04 to invert points 5 and 6IC652 7407 DIP14IC653 74LS08 DIP14 TS681 BC548B TO-92 DIN - 8 pin female / panel mount SD-80LS (Digikey) 6 foot DIN 8 male cables assembly 10-00438 (Digikey) Quote Link to comment Share on other sites More sharing options...
+5-11under Posted December 23, 2016 Share Posted December 23, 2016 I haven't done the mod, but here's my thoughts: The vertical black line is the 4 signals, shown as a bus, LGBR - similar as shown in the RAM above it. Does IC653 pin 11 connect to IC652 pin 9 and pin 13? - Yes Does IC653 pin 8 connect to IC652 pin 3 - Yes What does "&" mean inside of IC653? - AND gate? If not, doesn't matter? What does "1" mean inside IC652? - Buffer? If not, doesn't matter? I assume IC656 is not needed as its not in the red area, does that sound right? - I think you'll need that if it's not already there. I think these two are related to SCART pin 8/select and pin 16/blanking. Do you agree? - Probably agree = don't need. 1 Quote Link to comment Share on other sites More sharing options...
+grips03 Posted December 23, 2016 Author Share Posted December 23, 2016 I haven't done the mod, but here's my thoughts: The vertical black line is the 4 signals, shown as a bus, LGBR - similar as shown in the RAM above it. Does IC653 pin 11 connect to IC652 pin 9 and pin 13? - Yes Does IC653 pin 8 connect to IC652 pin 3 - Yes What does "&" mean inside of IC653? - AND gate? If not, doesn't matter? What does "1" mean inside IC652? - Buffer? If not, doesn't matter? I assume IC656 is not needed as its not in the red area, does that sound right? - I think you'll need that if it's not already there. I think these two are related to SCART pin 8/select and pin 16/blanking. Do you agree? - Probably agree = don't need. For the first rev of the pcb I'm going to leave out the bus as I can't figure out why one would mix the RGB colors before sending to 7407 buffer. Yes, you got it "&" for AND gate, then "1" Buffer, on OR gate they did "> = (vertically) 1" . Think this is the first time I saw that on a schematic. Kind of a cool little short hand. I was able to confirm these signals are for SCART pin8 and PIN 16, so will leave off as I plan to use with XRGB and PVM. Quote Link to comment Share on other sites More sharing options...
+KylJoy Posted December 23, 2016 Share Posted December 23, 2016 That vertical "bus" line is just a representation of all separate signals. It is not showing that they should be mixed together. I am not a fan of showing multiple signals as a single bus as it adds confusion. It confused me when I built this mod for my O2. 2 Quote Link to comment Share on other sites More sharing options...
+grips03 Posted December 23, 2016 Author Share Posted December 23, 2016 That verrical "bus" line is just a representation of all separate signals. It is not showing that they should be mixed together. I am not a fan of showing multiple signals as a single bus as it adds confusion. It confused me when I built this mod for my O2. edit: I found the diodes under the masking tape. 1 Quote Link to comment Share on other sites More sharing options...
+grips03 Posted December 23, 2016 Author Share Posted December 23, 2016 Inputs to RGB PCB Going to use 2x5 / 10 pin IDC header Sync - 612160 pin 8 or P8244 pin 5 Blank - 612160 pin 9 Red - 612160 pin 10 or P8244 pin 18 Video / [L]uma - 612160 pin 11 Blue - 612160 pin 12 or P8244 pin 20 Green - 612160 pin 13 or P8244 pin 19Audio - P8244 pin 27 +5v = various spots GND = various spots 612160 Color Encoder is labeled IC1 on O2 system board P8244 is labeled IC5 on O2 system board Outputs from RGB PCB Going to use 2x5 / 10 pin IDC header connected to DIN 8 Red - DIN pin 5 Green - DIN pin 8 Blue - DIN pin 3 Audio - DIN pin 7 Sync - DIN pin 4 GND - DIN pin 2 Quote Link to comment Share on other sites More sharing options...
+grips03 Posted December 24, 2016 Author Share Posted December 24, 2016 Would be great if someone could compare to the original schematic to see if I made any errors. Quote Link to comment Share on other sites More sharing options...
+KylJoy Posted December 25, 2016 Share Posted December 25, 2016 edit: I found the diodes under the masking tape. Yup, they are there! Quote Link to comment Share on other sites More sharing options...
+grips03 Posted December 27, 2016 Author Share Posted December 27, 2016 Updated audio section. Added Status RGB in case its needed. Quote Link to comment Share on other sites More sharing options...
+KylJoy Posted December 27, 2016 Share Posted December 27, 2016 This will be great! Quote Link to comment Share on other sites More sharing options...
SSG Posted December 27, 2016 Share Posted December 27, 2016 Interesting. I wouldn't mod mine though. I don't have any issued with simple RF + Coaxial Adapter. Quote Link to comment Share on other sites More sharing options...
+grips03 Posted January 13, 2017 Author Share Posted January 13, 2017 RGB board works. Need to wire to DIN and test audio next. 2 Quote Link to comment Share on other sites More sharing options...
+grips03 Posted January 15, 2017 Author Share Posted January 15, 2017 RGB mod pcb works perfect. Video and audio tested. Uses composite sync. Very happy with results. I would install the DIN 8 near the X and not near the spot I picked as it can rub against the system board. 4 Quote Link to comment Share on other sites More sharing options...
metarog Posted January 15, 2017 Share Posted January 15, 2017 Very nice... the picture quality looks awesome. 1 Quote Link to comment Share on other sites More sharing options...
+grips03 Posted January 15, 2017 Author Share Posted January 15, 2017 (edited) Very nice... the picture quality looks awesome. Thanks. Pictures are of 52 inch LCD TV O2--->RGB --->XRGB2--->VGA--->TV Edited January 16, 2017 by grips03 Quote Link to comment Share on other sites More sharing options...
+grips03 Posted January 15, 2017 Author Share Posted January 15, 2017 Updated pin names. Inputs to RGB PCB 2x5 / 10 pin IDC header IDC Pin 1 / VCC = +5v IDC Pin 2 / Composite Sync - 612160 pin 8 or P8244 pin 5 IDC Pin 3 / Blank - 612160 pin 9 IDC Pin 4 / Red - 612160 pin 10 or P8244 pin 18 IDC Pin 5 / Luma - 612160 pin 11 - currently labeled VID on rev 2 pcb IDC Pin 6 / Blue - 612160 pin 12 or P8244 pin 20 IDC Pin 7 / Green - 612160 pin 13 or P8244 pin 19IDC Pin 8 / Audio - P8244 pin 27 IDC Pin 9 / GND IDC Pin 10 / GND Quote Link to comment Share on other sites More sharing options...
+grips03 Posted February 5, 2017 Author Share Posted February 5, 2017 I'm selling bare Odyssey 2 RGB PCB for $20 +$5 shipping in the US. This is for pcb only, you will need to add electronics / wiring. Also works with Videopac G7000 edit: Send me a PM with your email address to order. I'll send you paypal.com invoice. Quote Link to comment Share on other sites More sharing options...
CatPix Posted February 6, 2017 Share Posted February 6, 2017 Updated audio section. Added Status RGB in case its needed. Status RGB is very needed for SCART TVs. Only a handful of TV offer the option to select between AV and RGB on the SCART input, so without the RGB status line, the TV will default to composite. 1 Quote Link to comment Share on other sites More sharing options...
carlsson Posted February 6, 2017 Share Posted February 6, 2017 (edited) ^^ 100% agree with CatPix. At the retro gaming expo I was arranging last weekend, we had several computers outputting RGB through a SCART cable where the RGB select signal was not enabled. Only a few of the CRT TV's we had brought had the option to manually select RGB mode, which meant some careful mixing and matching to get as many systems as possible running. Edited February 6, 2017 by carlsson Quote Link to comment Share on other sites More sharing options...
mutterminder Posted February 13, 2017 Share Posted February 13, 2017 I would be interested in one of the PCB's. How to we order one? Quote Link to comment Share on other sites More sharing options...
+grips03 Posted February 13, 2017 Author Share Posted February 13, 2017 In post #13 I have RGB board installed on the system board. It fits ok, however it would have been better if I lined up the corners. Quote Link to comment Share on other sites More sharing options...
+grips03 Posted February 23, 2017 Author Share Posted February 23, 2017 Updated Parts list to buy from Digikey, Mouser, etc. All resistors are 1/4watt axial 1%. R723 47 ohm (not usually needed, RGB status only)R751 100 ohmR774 180 ohmR738 470 ohmQty 3 R735, R736, R737 560 ohmR773 680 ohmQty 3 R746 (labeled R745 on pcb), R747, R748 1k5 aka 1.5K ohmQty 2 R772, R733 4k7 aka 4.7K ohm Qty 2 C852, C854 10nf aka 10000pf or .01uf .1 or 2.54mm spacedQty 6 D692-D697 1N4148 DO-35 74LS04 (to invert points 5 and 6) - labeled IC3 on the RGB PCB.IC652 7407 DIP14IC653 74LS08 DIP14TS681 BC548B TO-92 DIN - 8 pin female / panel mount SD-80LS (Digikey)6 foot DIN 8 male cables assembly 10-00438 (Digikey)Qty 1 H3CCS-1036M (Digikey) <-- this is 10 position ribbon cable with connector on itQty 2 302-S101 (Digikey) <--this is 4 wall shrouded header that accepts the cable aboveQty 1 SCART plug 21 pin male connector (Console5.com) Quote Link to comment Share on other sites More sharing options...
+save2600 Posted February 23, 2017 Share Posted February 23, 2017 RGB out of the O2 - man, you guys are hardcore! What's next, HDMI out of the original Odyssey? Quote Link to comment Share on other sites More sharing options...
+grips03 Posted February 27, 2017 Author Share Posted February 27, 2017 Inputs to RGB PCB 2x5 / 10 pin IDC header (updated 2/26/2017) Best to use IC1/612160 for the inputs, except for audio. IDC Pin 1 / VCC +5v / 612160 Pin 1 IDC Pin 2 / Composite Sync - 612160 pin 8 or P8244 pin 5 IDC Pin 3 / Blank - 612160 pin 9 IDC Pin 4 / Red - 612160 pin 10 or P8244 pin 18 IDC Pin 5 / Luma - 612160 pin 11 - Labeled VID on rev 2 and LUM on rev 2a pcb IDC Pin 6 / Blue - 612160 pin 12 or P8244 pin 20 IDC Pin 7 / Green - 612160 pin 13 or P8244 pin 19IDC Pin 8 / Audio - P8244 pin 27 IDC Pin 9 / GND / 612160 Pin 15 or 16 IDC Pin 10 / GND - Normally not connected (spare) Outputs from RGB PCB towards DIN 8 connector.IDC Pin 1 = REDIDC pin 2 = GRN / GreenIDC Pin 3 = BLU / BlueIDC Pin 4 = SC / Composite SyncIDC Pin 5 = AUD / AudioIDC Pin 6 = SR / Status RGB - not used for XRGBIDC Pin 7 = NCIDC Pin 8 = NCIDC Pin 9 = NCIDC Pin 10 = GND Quote Link to comment Share on other sites More sharing options...
Like us on Facebook
Follow us on Twitter
AtariAge on Instagram
Watch us on YouTube
Chat on Discord
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.