Guide: How to overclock your SNES, Super FX games

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Originally Posted by retroborg

Yes the intro does finish before the music finishes. So the overclock worked I guess.

OK, so I shortened the wires in the oscillator for the blob Starfox to the minimum, but the exact same graphics glitches occur. I'll also try a 27MHZ oscillator. It's interesting how you're using a 30MHZ oscillator on the exact same blob PCB without the above graphic glitches! I did this on a EURO PAL Starwing, what is yours, US NTSC?
I also successfully performed the above overclock using a 28.322MHZ oscillator in Doom, without any problems or graphics glitches what so ever. Would Doom work fine with a 30MHZ oscillator or above, because I've read that it can't go any higher than 28.322MHZ

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Yeah, mind was an NTSC cart. Keep in mind that these Super FX carts can perform higher speeds than others, even if there the same game. I don't know why that is but it's about luck at that point. For example I have 2 stunt race fx games. 1 can be overclocked to 28MHz with no issues but my other well have issues overclocked to 28MHz, So I have that one overclocked to 27MHz.

27MHz is the most stable speed you can give to any Super FX carts without any issues.

No Doom well most likely not work if overclocked to 30MHz. Have you tried to get far with Doom without any issues being overclocked to 28MHz? I'm asking because when I had Doom overclocked to 28MHz. The game would freeze after I got around level 3 or 4. It wasn't til I overclocked it with an 27MHz 4-pin oscillator that I was able to beat the whole game without any issues.

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Originally Posted by Thunderblaze16

Yeah, mind was an NTSC cart. Keep in mind that these Super FX carts can perform higher speeds than others, even if there the same game. I don't know why that is but it's about luck at that point. For example I have 2 stunt race fx games. 1 can be overclocked to 28MHz with no issues but my other well have issues overclocked to 28MHz, So I have that one overclocked to 27MHz.

27MHz is the most stable speed you can give to any Super FX carts without any issues.

No Doom well most likely not work if overclocked to 30MHz. Have you tried to get far with Doom without any issues being overclocked to 28MHz? I'm asking because when I had Doom overclocked to 28MHz. The game would freeze after I got around level 3 or 4. It wasn't til I overclocked it with an 27MHz 4-pin oscillator that I was able to beat the whole game without any issues.

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I played Doom all the way until half way through Level 3, then I stopped it. It had no frozen or showed any other glitches up to that point. I'll play again through the entire 1st episode and let you know. If I have time I'll try to beat the whole thing, but the lack of a Save system is a bit daunting the least.

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Originally Posted by retroborg

I played Doom all the way until half way through Level 3, then I stopped it. It had no frozen or showed any other glitches up to that point. I'll play again through the entire 1st episode and let you know. If I have time I'll try to beat the whole thing, but the lack of a Save system is a bit daunting the least.

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It should interest you that the Super Famicom version of Doom was release 6 months after the US release and was ported by Imagineer. You can load up any episode on ANY difficulty level. Multiplayer was also available if you had the XBAND modem.

Learn more about the different versions of Doom for the snes here.
http://www.doomworld.com/vb/doom-gen...-in-snes-doom/

So, I managed to find a 27MHZ ACHL-27.000MHZ-EK 3.3V 4-Pin Square oscillator to try it on my blob version of Starfox instead of the 28MHZ which caused the graphics glitches. but it's at 3.3V, unlike the 28MHZ which is at 5V. So will this work, or will it fry the oscillator? Perhaps I should use a 220 ohm resistor between the game's PCB 5V point and the 3.3V leg on the oscillator?

Thanks in advance

You need regulated 3.3V source for the oscillator. Tho output you can feed to the chips as is.

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Originally Posted by TmEE

You need regulated 3.3V source for the oscillator. Tho output you can feed to the chips as is.

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Thanks!
Please excuse my ignorance, but what should I do exactly? Connect the 3.3V leg of the oscillator to the 5V point on the PCB as is?

You need a voltage regulator, that takes 5V in and puts 3.3V out. LM1117-3.3 is a good choice.

OK. Thanks! I'll check it out.

Is it possible to overclock the non-blob pcb of StarFox?

I already made an own thread about it, but I also want to post here, does anyone know how to work with cartride that has an 74LS138A instead of an 74hcu04?

Hi Guys,

Sorry for bring a thread back from the dead but given the useless amount of info on the web for overclocking Starwing I thought I would share my latest work on the subject.

As luck would have it I already had a spare Starwing cart so I grabbed myself a cheap Stunt Race FX cart from eBay for £4 to do this work.

Firstly I removed the Starwing ROM chip from it's original Mario Chip 1 board. Did this using a heat gun to ensure no damage to the legs.

I did the same with the Stunt race FX rom. Which left me with a fresh Super FX 2 board to use. I then soldered the Starwing rom to the Stunt Race board and it worked perfectly first time. I then overclocked that board with a 27mhz oscillator and the game now runs amazingly well. The improvement can be seen almost immediately on the intro screen as when it begins it used to slow down, now it works smooth as butter.

I recommend anyone looking to overclock Starwing try this method as it's nice and simple and yields great results. It's like a different game now! :)

http://i7.photobucket.com/albums/y27...psngwl1cj8.jpg

You can also use a ceramic resonator w/ caps, just replace the stock one.

https://farm9.staticflickr.com/8158/...e877a442_c.jpg

Anybody have a link to an online source to buy some of these crystals? I can't seem to find a 4 pin in 27 MHz @ 5v.

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Originally Posted by Polygon

Anybody have a link to an online source to buy some of these crystals? I can't seem to find a 4 pin in 27 MHz @ 5v.

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Not that I know of as of now but I have 2 used - 27MHz crystal to spare. You can have both for $7.

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Originally Posted by Thunderblaze16

Not that I know of as of now but I have 2 used - 27MHz crystal to spare. You can have both for $7.

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Just let me know where to send it. :)