Excellent... Hope it works, but I can't find my hot glue gun...I'm proud of you, son.
you saved the little guy!
Excellent... Hope it works, but I can't find my hot glue gun...I'm proud of you, son.
you saved the little guy!
Drake you truly gave Philippe a "leg up" in his repair!I'm proud of you, son.
you saved the little guy!
Good question, There's something to investigate on the data sheet side regarding access, read/write timings. When selecting the ram chips we knew the current configs were good for ~50mhz but obviously other elements get in the way of pushing this limit.Whoa @Kay K.M.Mods! Now that gets my attention!
Can the 60ns VRAM and OS-CON caps still support frequency ranges up to 120 MHz with the 68040 running at 60 MHz?
@Drake is right. Thank you.Whoa @Kay K.M.Mods! Now that gets my attention!
Can the 60ns VRAM and OS-CON caps still support frequency ranges up to 120 MHz with the 68040 running at 60 MHz?
Impossible to know because only Kay has one of those new overclockers right now. But I suspect VRAM speed may be a limiting factor at some point.Can the 60ns VRAM and OS-CON caps still support frequency ranges up to 120 MHz with the 68040 running at 60 MHz?
Bridge 1K OHMS instead of SL jumpers. It is possible to set below 15MHZ, so I think you can drop it to 12MHz. GOOD LUCK!!!Hello all !
So after replacing all caps on my 660AV with OS-CON, and also receiving the MC88920, I started again testing today.
First good news, the Mac still boots up with the original 25 MHz. At least, recapping (for the second time...) went good.
Now I need to figure out what's the upper limit for the Spicy.
@Kay K.M.Mods Quick question, since you're working on a "Super hot" version, do you think you could design a more universal one; that could go to lower frequencies (in my case starting at the 12.5 MHz).
And yes, I do remember, I can and will use an external resistor. I'm just trying to clean out the build.
By the way, I'm curious to see which wires / connectors you use. The quality is good, and I'd like to make shorter versions.
Guys, OS-CON rules.
I now seem to be able to get a stable 33 MHz, which I could not use before.
I will reassemble, plug devices (that made the Spicy 660AV crash before) and see how stable it is.
Also I will start to look at CPU temps and cooling, but since I have an RC33, I'm not too worried for now.
Nice solutionView attachment 10993
Use male and female pin headers. Bridge at 1Kohms.
View attachment 10992
I think it goes down to below 15MHz.
Oh wow. Huh, I wonder if it could be used with the Centris 610? I think it needs an oscillator that slow.Nice solution
It goes well below, I could even reach 12.5 MHz, so as to match the factory speed if needed.
As you can see, @JDW, in my annotation, the green highlight shows the safe temperature ranges followed by orange highlights when the material starts to deteriorate. Finally, the red highlights worse deterioration progresses as the temperature rises.
For an overclocked LC575 motherboard application, even when used within the smaller case confines of a Color Classic, I have not measured heat much beyond 60°C. Of course, I do have a fan added, and that tends to keep temperatures in the 50's or lower.I would actually adjust that last section with ABS to match that of the ASA. If you look closely at the 4th piece of ABS, there is dimensional loss.