emerson Posted February 10, 2019 Author Share Posted February 10, 2019 There are a few details I should have mentioned before: - The 3.5mm audio jack is optional for this board and you can get stereo audio from the mini din9 connector. - The top of the pcb is a giant ground shield to help eliminate interference. - Cutting off the 12v leg will not affect any other part of the circuit. 2 Quote Link to comment Share on other sites More sharing options...
emerson Posted February 15, 2019 Author Share Posted February 15, 2019 I've got both boards designed and built. I'm pretty happy with how everything looks so I will be ordering some professionally made boards in the near future. I think I will change the necessary through-hole pads to SMD to make the installation process easier. The expansion pads will remain through-hole so the end user can solder pin headers in and connect their expansion boards arduino shield style. I decided to add composite video to the dsub 15 board. The end user can decide to not populate the LM1881 (and a few passives) and jumper composite video on pin 13, or populate all components and have c-sync on pin 13 and v-sync on pin 14. The picture below shows everything populated. The female pin headers are there just for testing purposes. 2 Quote Link to comment Share on other sites More sharing options...
emerson Posted February 21, 2019 Author Share Posted February 21, 2019 The video scaler arrived today. In short order I had the intellivision -> scart cable -> scaler -> hdmi monitor setup working. The scart cable is some generic one I bought off ebay to demonstrate my mod is compatible with Genesis 2 rgb cables. Pulling one of the V1-V4 wires verifies the scaler is processing rgb and not composite video. The picture quality is better than in the photos below but is still not super sharp. The scart cable is neither 75 ohms or ground shielded so that is the first thing I want to try changing. It's also a cheap scaler so it could just be that. Either way I'm happy that my mod works with standard unmodified equipment. I am looking for an Intellivision 2 to do more testing. If you have one and would like to sell/trade it, send me a pm and we'll work something out. I have someone lined up to test my mod on their OSSC, but if you have a different scaler and would like to test let me know. Thanks! The setup 800x600 resolution Notice the haziness between the letters in 800x600 mode 1280x720 resolution There is less haziness 1 Quote Link to comment Share on other sites More sharing options...
emerson Posted February 21, 2019 Author Share Posted February 21, 2019 Just got another person on board to test my mod with their framemeister. 1 Quote Link to comment Share on other sites More sharing options...
+grips03 Posted February 22, 2019 Share Posted February 22, 2019 I have OSSC, XRG2, 3 PVMs, and the ebay RGB to HDMI adapter you have. If want me to test, let me know. Past RGB mods for Intv did not have consistent colors. Would be great if this one did. Also OSSC didn't like sync from Intv. XRG2, PVM, and eBay adapter all sync'd fine. 1 Quote Link to comment Share on other sites More sharing options...
emerson Posted February 22, 2019 Author Share Posted February 22, 2019 I was looking at the inty rgb mod installation guide on retrorgb's website and I don't see any wires connected to the sync pins or video signal. I'm assuming the mod monitors V5 on the AY-3-8915 color chip and derives its own sync signals based on that. Maybe this is why that mod doesn't work with the OSSC? Quote Link to comment Share on other sites More sharing options...
SiLic0ne t0aD Posted February 22, 2019 Share Posted February 22, 2019 https://www.videogameperfection.com/forums/topic/no-sync-intellivision/page/2/ ^ On page 2, they start talking about the timing. If the firmware was modified, that RGB mod could work on the OSSC supposedly. I won't hold my breath though, so your mod is probably our only hope. Quote Link to comment Share on other sites More sharing options...
emerson Posted February 22, 2019 Author Share Posted February 22, 2019 Seeing how my mod uses sync signals derived from the console video I assume it will work just fine. We'll find out for sure once I get some boards out to the testers. Also, I will be designing an 8pin mini DIN pcb with a pinout that matches Fred's mod and the XRGB input. 1 Quote Link to comment Share on other sites More sharing options...
emerson Posted February 23, 2019 Author Share Posted February 23, 2019 I did some more testing with the cheap hdmi video scaler and had good results. I tested an Emerson LD190EM1 lcd tv and a Sony Wega KDF-55E2000 rear projection tv and the picture looked great on both. No haziness between the letters at all. Removing the series capacitors on the rgb wires of my scart cable had little effect on the picture so I left them in. Unfortunately the pictures I took don't capture the quality. The lcd that gave the bad results was an LG 19LH20-UA. Emerson LD190EM1 Emerson LD190EM1 Sony Wega KDF-55E2000 Sony Wega KDF-55E2000 1 Quote Link to comment Share on other sites More sharing options...
emerson Posted March 5, 2019 Author Share Posted March 5, 2019 I recently acquired an Intellivision 2 to test the mod... and unfortunately it doesn't quite fit. The video connector is off center by ~1.5mm. Just enough for the video cable not to fit. This affects only the mini DIN pcbs since the dsub 15 pcb will require case tooling anyway. Also, the solder pad for the video pin does not line up correctly. A jumper wire or bent resistor lead will be required for this first run of boards. This means I'll have to design separate pcbs for the Intellivison 2. On the plus side, I have created replacement parts lists for: - mains power cord connector for 2609 - electrolytic cap kits for both 2609 and 5872 - ribbon cable for 2609 power board - reset button for 2609 - reset/fast switch mod for 5872 - pin header for 5872 power board - power cable barrel connector for 5872 I have also designed breakout boards for the COLOR and SOUND chips so no more bending leads and soldering directly to chips! Lines up well on the 2609... but not on the 5872. Lines up well on the 2609... but not on the 5872. 1 Quote Link to comment Share on other sites More sharing options...
mattyv316 Posted March 5, 2019 Share Posted March 5, 2019 It is always great news to see your updates. Thank you. As an INTV 2 owner, my opinion is that I would be ok with grinding the case slightly. Small price to pay for what looks like a great RGB solution. Any news on testing with OSSC? Quote Link to comment Share on other sites More sharing options...
emerson Posted March 5, 2019 Author Share Posted March 5, 2019 It is always great news to see your updates. Thank you. As an INTV 2 owner, my opinion is that I would be ok with grinding the case slightly. Small price to pay for what looks like a great RGB solution. Any news on testing with OSSC? Hey, thanks! No updates yet on OSSC support. I'll be getting boards out to my testers here in the next couple weeks. I'm excited to find out myself! Quote Link to comment Share on other sites More sharing options...
HeadcolorsTV Posted March 6, 2019 Share Posted March 6, 2019 I'm curious (and guessing the answer is almost certainly "no"): could this mod work, in theory, with Tim Worthington's RGB-to-YPbPr conversion kit? http://etim.net.au/shop/shop.php?crn=210&rn=549&action=show_detail Quote Link to comment Share on other sites More sharing options...
emerson Posted March 8, 2019 Author Share Posted March 8, 2019 The NESRGB component video board will not work with my circuit. If you look at the NESRGB installation guide it tells you to pull the Y signal from the main board and the PB and PR signals from the daughter board. Can't say for sure if it will work, but if you want component video on your intellivision I suggest putting this circuit after mine. https://www.analog.com/en/design-center/reference-designs/circuit-collections/lt6550-rgb-to-ypbpr-component-video-conversion.html#cc-overview Don't forget to mix in the sync signal somewhere along the line. Quote Link to comment Share on other sites More sharing options...
HeadcolorsTV Posted March 8, 2019 Share Posted March 8, 2019 (edited) The NESRGB component video board will not work with my circuit. If you look at the NESRGB installation guide it tells you to pull the Y signal from the main board and the PB and PR signals from the daughter board. Can't say for sure if it will work, but if you want component video on your intellivision I suggest putting this circuit after mine. https://www.analog.com/en/design-center/reference-designs/circuit-collections/lt6550-rgb-to-ypbpr-component-video-conversion.html#cc-overview Don't forget to mix in the sync signal somewhere along the line. Slap it all on PCBs, write the instructions, and I'll buy it and install it. LOL. That's about as far as my modding skills go. Thank you for the info though. Edited March 8, 2019 by HeadcolorsTV Quote Link to comment Share on other sites More sharing options...
SkydivinGirl Posted March 31, 2019 Share Posted March 31, 2019 I'd also be happy to buy/test one of these. I have OSSC, FrameMeister, and RetroTink for upscalers/line doublers. I can solder SMD so a kit with parts would be fine. Thanks! Heather Quote Link to comment Share on other sites More sharing options...
emerson Posted March 31, 2019 Author Share Posted March 31, 2019 I'd also be happy to buy/test one of these. I have OSSC, FrameMeister, and RetroTink for upscalers/line doublers. I can solder SMD so a kit with parts would be fine. Thanks! Heather Thanks for the heads up, pm sent. Quote Link to comment Share on other sites More sharing options...
SkydivinGirl Posted March 31, 2019 Share Posted March 31, 2019 I forgot that the Retrotink 2X has component input, not RGB so it won't be good for this. Heather Quote Link to comment Share on other sites More sharing options...
Ikrananka Posted April 19, 2019 Share Posted April 19, 2019 Any updates? I'm very interested in acquiring one of these mods. I have an OSSC and so having it work with that is key for me. Quote Link to comment Share on other sites More sharing options...
emerson Posted April 20, 2019 Author Share Posted April 20, 2019 Shipping for the new batch of pcbs took longer than usual but they finally arrived. I am currently working on the assembly / installation instructions. The testers will be receiving their boards as soon as possible. I have decided to sell the mod in small batch production runs, but not until after I finish some previous obligations. All the information needed to make the mod yourself will be freely available at that time as well. 2 Quote Link to comment Share on other sites More sharing options...
Ikrananka Posted April 20, 2019 Share Posted April 20, 2019 Shipping for the new batch of pcbs took longer than usual but they finally arrived. I am currently working on the assembly / installation instructions. The testers will be receiving their boards as soon as possible. I have decided to sell the mod in small batch production runs, but not until after I finish some previous obligations. All the information needed to make the mod yourself will be freely available at that time as well. Great news - thanks for the update Quote Link to comment Share on other sites More sharing options...
emerson Posted April 25, 2019 Author Share Posted April 25, 2019 The SOUND daughter board unfortunately covers up the hole for a screw post on the 2609 so those have to be redesigned. I also decided to remove the holes for mounting another board over the GAL chip and replaced them with SMD solder pads. If you need to add another board just use the GAL ic socket. The new 5872 boards line up well. 1 Quote Link to comment Share on other sites More sharing options...
+fdr4prez Posted April 26, 2019 Share Posted April 26, 2019 The SOUND daughter board unfortunately covers up the hole for a screw post on the 2609 so those have to be redesigned. I also decided to remove the holes for mounting another board over the GAL chip and replaced them with SMD solder pads. If you need to add another board just use the GAL ic socket. The new 5872 boards line up well. Does the daughter board have any traces in the way? If not, then you can simply drill through it, for now, and then in the next batch of boards you can add the hole into the design Quote Link to comment Share on other sites More sharing options...
emerson Posted April 26, 2019 Author Share Posted April 26, 2019 Does the daughter board have any traces in the way? If not, then you can simply drill through it, for now, and then in the next batch of boards you can add the hole into the design I just finished re-designing the new board so the deed is done, but thanks for the suggestion. Quote Link to comment Share on other sites More sharing options...
the_crayon_king Posted May 7, 2019 Share Posted May 7, 2019 (edited) Shipping for the new batch of pcbs took longer than usual but they finally arrived. I am currently working on the assembly / installation instructions. The testers will be receiving their boards as soon as possible. I have decided to sell the mod in small batch production runs, but not until after I finish some previous obligations. All the information needed to make the mod yourself will be freely available at that time as well. Good to hear. I will be working on a similar project in the near future using different components namely a FPGA, ADV7125. Anyway I don't know if I skimmed over it but have you tried taking sync from the bits 1 X X 0 1 instead of wherever you are taking it ? I just wonder if one is better than the other; it could possibly save me a lot of grief in the future. I think in general using C-sync instead of sync on xxx is better. Also if you use those bits you could use the THS7374 on the outputs (SRGB) to easily toggle C-Sync 75 or C-Sync TTL with just resistors and jumpers. The lm1881 can then be done away with entirely. I can go way more into detail if needed. Also I dunno if it helps but the external video is half the length of RGB on the same rising edge (I believe)., which is specific to the intellivision 1. I have no idea what the others do. At any rate that signal should be a square wave input that is 1111-1111, 255, aka white. I don't know anything about the device you are using or programable circuits in general (yet). Edited May 7, 2019 by the_crayon_king Quote Link to comment Share on other sites More sharing options...
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