MJay99 wrote on 2023-01-18, 23:56:
And then, sometimes things seem to align with an undeservedly still much too small channel I just happened to run across in my f […]
And then, sometimes things seem to align with an undeservedly still much too small channel I just happened to run across in my feed: https://m.youtube.com/watch?v=ASouxxQyABk
Almost at the end, you can see Mike / vswitchzero deal with issues of the ECS crystal on his Ultrasound Classic and using a close replacement one.
But, there's also one good extra information: it seems he was able to get an (albeit also broken) replacement from Ian Polpo, whom I've found to be working on another fun project over here:
PicoGUS: Gravis Ultrasound emulator on an ISA card with Raspberry Pi Pico
Who knows, maybe there's still one more in his drawers... 😀
Wow, thank you so much for the lead! I bet Ian is the one that bought all of the stock from RCFreelance at some point in the last 4 years. 😁
I have sent him a PM.
I watched the video, and it is odd that he was getting some kind of intermittent problem related to grounding\capacitance, and that it did it with both crystals. I don't know much about circuits, but I'm inclined to agree with the other commenters on the video saying that the card likely has a capacitor issue. The newer crystal is probably less susceptible to the issue, so it seems to fix the problem.
Hopefully my card doesn't develop such issues if I'm able to get a proper crystal for it, but if it does I will focus on capacitors.
You have actually helped me with two other projects though as well! I have an Nvidia NV1 and an Alliance AT3D that both have odd issues that seem to respond to touch. I have replaced electrolytic caps on both of them, but now that I have actually seen someone experience similar issues I will probably try two things: replacing any clock crystals with identical replacements, replacing other capacitors on the card.
Thank you again for taking the time to post about this. 😀
Now for some blitting from the back buffer.