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Tekman

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  1. Nice to see one of my DRAM to SRAM Converter PCBs installed out in the wild. Keep in mind that it's static discharge the blows U18 and U19 and others. Your test environment on the couch arm isn't an ideal location, especially this time of year depending on location when the air is dry and the heat is on building up some serious static. I recommend at least a cheap static safe environment for repairs. Something like this for under $20 will do the job https://www.amazon.com/Electronics-HPFIX-Grounding-Soldering-Resistant/dp/B08FHQDKDH
  2. Coleco didn’t make it easy to find an easy spot to verify +5v inside the console. With only the three expansion slots and data drive connectors available, it’s easy to slip and short things out. Even trying to use the I/O expansion edge connector is difficult. What I do is read across any easy to reach +5v decoupling capacitors on my MIB238-WiFi or 1MB RAM Expander boards. I’m assuming you do not have the luxury of having an expansion card inside your console. The easiest method people use is to use a roller controller power tap adapter and read it from upper two widest apart female sockets. I still prefer to read the +5v further past this point because there is still more wiring from that point until it reaches the main Gamma PCB. There is still nothing wrong with reading it from the adapter for good results. If you don’t have any of these, the two very top left and right fingers of all three expansion slot connectors are GND (left) and +5v(right). Just don’t press down too hard on the connectors and accidentally squeeze them together and short them out. The Meanwell itself has protection for that, but no reason to push your luck elsewhere.
  3. True, but I wonder why the dump always works on the ATARIMAX when the physical cart doesn't? What could the ATARIMAX be doing to make it work? Timing of some kind?
  4. That's the whole point we've been discussing all this time. It works on some and not others. Same with it working on your two vanilla ADAM console and not my four consoles. Toby testing on the same CV console that it has always worked on doesn't conclude the issue being discussed here.
  5. I’m going to say this observation is incorrect. Two of the four standalone ADAM consoles I tested with were plain vanilla and not modded whatsoever. The other two modded ADAM consoles had one internal and one external power supply and both had MIB238 and memory expanders installed. I removed the MIB238 and memory expanders from both and they still didn’t work. Keep in mind that I have zero issues with anything else, except GnG and Suite Macabre. I’m simply stating the fact that a dump works on the ATARIMAX regardless of any configuration and the physical cart works in my CV without the SGM inserted and looks like I’m clearly not alone with these issues. Concluding it must be the end user’s hardware doesn’t hold water in my testing with four consoles and one CV. Unless there was a mix of different cartridge hardware revisions/designs or different code revisions that got sent out on this release, one can only assume the ATARIMAX is compensating for some sort of issue with the physical cartridge hardware or code. I'm just hoping this information will be valuable for the developers and will make for more reliable titles in the future.
  6. The Lundy Electronics adapter is design for using the “A” version of the Meanwell GP25 power supply. The “B” floating ground version used by others has been known to cause noise in the display. The one on ebay with the “B” version is $69.99 + $14.99 (to my location) shipping for a total of $84.98 The Lundy Electronics adapter is $24.00 + $4.75 (to my location) shipping for a total of $28.75 The mouser “A” version supply is $36.92 + $7.99 (to my location) shipping for a total of $44.91 Both combined are $73.66, which is $11.32 cheaper than the ebay listing. https://lundyelectronics.com/product-category/colecovision/ https://www.mouser.com/ProductDetail/MEAN-WELL/GP25A13A-R1B?qs=9HM%2FdYkAMWxfTvoxh7QCoA%3D%3D
  7. I just pulled out a fourth console this morning to test and still hangs on the orange screen like the other three ADAM consoles and my CV when the SGM is installed.
  8. My GnG cart works in my CV as long as I don't have my SGM inserted. If I use the ATARIMAX and have the SGM connected, it will work in the CV. I also know someone that has a GnG cart that doesn't work in their standalone ADAM as well. I know my cart is good because I can get it to work in the CV without the SGM and a dump of it on my ATARIMAX always works in every configuration every single time. Just consider yourself lucky I guess.
  9. Interesting. It doesn't work on my three ADAM consoles and also doesn't work on a friends ADAM console. I don't know what to say other than there needs to be better testing done on these titles before they are released. This was also the same behavior for Suite Macabre for me and had to use the ATARIMAX to work. Does Suite Macabre work in your ADAM as well?
  10. I couldn't agree more. Especially when they don't work correctly in their native cartridge form.
  11. ATARIMAX Maxflash USB Programmer with CV adapter. https://atarimax.com/flashcart/documentation
  12. It also hangs on the orange screen on all three of my ADAM consoles, despite the box saying for the ColecoVision and ADAM. However, it will work fine on the ADAM if you dump it and run it using an ATARIMAX cart.
  13. Hopefully when you get your RAM issue resolved, you will be able to troubleshoot the issue more easily. I'll attach the DIN pinout for reference in hopes it helps you. I have several of these cables off eBay and they work great. Maybe order one of these for something known good to troubleshoot with. AV cable - https://www.ebay.com/itm/292364883695
  14. This is normal and I also see this with some brand of monitors. Newer monitors verify a signal is active/detected before it shows A/V video and some seem to handle this detection faster than others. The problem is it can't handle how the VRAM test patterns are happening so quickly when the ADAM powers up using the diagnostic EXROM and never gets a chance to properly detect the video test patterns being displayed and just doesn't show anything. If you wait long enough, when it gets to a text output, it will snyc and show. The correct fix in this case is to reset into the CV side first to get known detectable video for the monitor and then reset into the ADAM, just like you did.
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