Mr. Ivy states that it is glitchy, but he simply needs a slower oscillator then the 31MHz one he found. Apparently, the CPU divides the oscillator speed by 6 to obtain the ultimate clock speed.
Robert Ivy Said wrote:This CPU is manufactured by Ricoh, and is a modified version of the WDC 65c816 that runs at a maximum speed of 3.58 MHz (software selectable multiplier). We will be going by the maximum speed for sake of confusion . The SNES's cpu internally divides whatever clock it recieves by 6, in this case, it recieves a 21.477 MHz clock signal. What we are going to do is disconnect the 21 MHz signal, and connect a 31 MHz crystal oscillator resulting in a maximum speed of 5.1 MHz! Quite a speed boost!
Whip out your SNESes and give it a try. If you have RC cars and/or their remotes, gut their oscillators if they fall between 21 and 31MHz.
PS - if you have oscillators between 21 and 31MHz, this guy is looking for some to test out a better overclock.
marshallh wrote:He emailed me about me about my SuperFX overclocking, wonder if he still remembers it...
Who? Epicenter? I've been talking to the guy, and I did a Genesis 2 overclock. He's writing an article for Retro Gamer [Magazine] and I took the pictures for it. So for all you readers, look out for my pictures in the next issue!
It's good to know that it's possible, and it's wonderful to know that it's hinges on an oscillator.
So who's going to be the first person to have an overclocked SNES and an overclocked FX chipped game?
vskid wrote:Nerd = likes school, does all their homework, dies if they don't get 100% on every assignment
Geek = likes technology, dies if the power goes out and his UPS dies too
Krepticor wrote:what would be the overall benefit of overclocking the SNES?
The builtin slow-mo feature the SNES had was a result of the limited clock speed. You overclock the CPU you can have smoother graphics, no lagging, other things like that.
vskid wrote:Nerd = likes school, does all their homework, dies if they don't get 100% on every assignment
Geek = likes technology, dies if the power goes out and his UPS dies too
Krepticor wrote:what would be the overall benefit of overclocking the SNES?
The builtin slow-mo feature the SNES had was a result of the limited clock speed. You overclock the CPU you can have smoother graphics, no lagging, other things like that.
i never noticed any of that but i see your point...
I refuse to dignify myself with an intelligent and witty signature
There's the near-final N64 overclocking, even though pins look bridged, they aren't. I also put some hot glue to hold down the wires and pins.
Anywho, I tried the SNES overclocking, and it worked PERFECTLY until I turned it on. Link was flying across the screen in more than a katrillion directions. I need a smaller clock rate..
. The SNES's cpu internally divides whatever clock it recieves by 6, in this case, it recieves a 21.477 MHz clock signal. What we are going to do is disconnect the 21 MHz signal, and connect a 31 MHz crystal oscillator resulting in a maximum speed of 5.1 MHz! Quite a speed boost!
. One for my portable N64 (coming soon) and one to overclock. And yes, I ended up successfully overclocking it this time.
