Help with Starfox problems
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Help with Starfox problems
Hi.
I just got an Starfox cartridge, board only (SHVC-1C0N5S-01).
It's locking at the first screen, sometimes the word Nintendo appears completelly, sometimes part of it and sometimes I just get a black screen with the music.
I tried to remove the resistor? that is plugged in place of the HC04, through pins 1 and 2 and put a wire in there.
So far so good, the game worked, but freezes after some time.
AFAIK, this componnent feeds the clock signal to the Mario-1 chip.
Is it so critical that without it the game crashes or I have something else wrong?
Is it really a resistor or some kind of inductor? The measured resistense is about 1ohm.
Thanks in advance.
I just got an Starfox cartridge, board only (SHVC-1C0N5S-01).
It's locking at the first screen, sometimes the word Nintendo appears completelly, sometimes part of it and sometimes I just get a black screen with the music.
I tried to remove the resistor? that is plugged in place of the HC04, through pins 1 and 2 and put a wire in there.
So far so good, the game worked, but freezes after some time.
AFAIK, this componnent feeds the clock signal to the Mario-1 chip.
Is it so critical that without it the game crashes or I have something else wrong?
Is it really a resistor or some kind of inductor? The measured resistense is about 1ohm.
Thanks in advance.
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Re: Help with Starfox problems
It's an inductor, not a resistor, and yes, it's necessary. Without it, I'm guessing you're getting a lot of noise on the clock, which could definitely crash the game.
Re: Help with Starfox problems
The pictures I saw show the inductor with small trimmed terminals.
Mine is almost touching the 256k SRAM.
Could this be the source of my problem, since I'm dealing with high frequency RF here?
Mine is almost touching the 256k SRAM.
Could this be the source of my problem, since I'm dealing with high frequency RF here?
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- Posts: 775
- Joined: Mon Jul 02, 2012 7:46 am
Re: Help with Starfox problems
Could be. Photos would help.
Re: Help with Starfox problems
I took 2 pics with my crappy phone, hope this helps to have an idea.
If I have read the pictur I saw fine, it's a 22mf x 6,3v.
I don think it's critical, is it?
Can an external clock generator be used?
The capacitor on the left was missing.If I have read the pictur I saw fine, it's a 22mf x 6,3v.
I don think it's critical, is it?
Can an external clock generator be used?
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- Posts: 775
- Joined: Mon Jul 02, 2012 7:46 am
Re: Help with Starfox problems
Almost looks like pad #2 from the U6 footprint is ripped off the substrate, but I don't know if that's even connected to anything. I'll have to take a look at my board once I'm home from vacation after the first.
Re: Help with Starfox problems
I tested with the multimeter and got continuity there.
Maybe My soldering iron was too hot when I put it back.
It seems to go to pin 69 of the Mario chip.
Edit: I figured out! It's a faulty inductor!
If I have undestand what I read, the original inductor is 0,1 or 0,2 microhenry (I just can't know if the second belt is brown or red), but I have put a 27 microhenry one.
Even far bigger, it seems to be working fine.
Thanks and happy new year!
Maybe My soldering iron was too hot when I put it back.
It seems to go to pin 69 of the Mario chip.
Edit: I figured out! It's a faulty inductor!
If I have undestand what I read, the original inductor is 0,1 or 0,2 microhenry (I just can't know if the second belt is brown or red), but I have put a 27 microhenry one.
Even far bigger, it seems to be working fine.
Thanks and happy new year!
Re: Help with Starfox problems
It's definitely red. Gold-Red-Gold on mine at least. That said I need to point out something, you said you have a bare PCB (no plastic cart case?) Well the StarFox game has a metal object in the cartridge that connects to that pad behind 59 and 60 on the PCB. This is an extra ground AFAIK that would normally make contact with the metal cartridge slot. Someone who was cleaning cartridges stated that the cartridge slot ground and the RF shielding in the SNES completes a ground circuit. YMMV.Fisher wrote:I tested with the multimeter and got continuity there.
Maybe My soldering iron was too hot when I put it back.
It seems to go to pin 69 of the Mario chip.
Edit: I figured out! It's a faulty inductor!
If I have undestand what I read, the original inductor is 0,1 or 0,2 microhenry (I just can't know if the second belt is brown or red), but I have put a 27 microhenry one.
Even far bigger, it seems to be working fine.
Thanks and happy new year!
I come from the net. Through systems, peoples and cities to this place.
Re: Help with Starfox problems
Interesting!
I didn't know that.
Is it all shielded, just like the N64 cartridges?
Could you please show some pictures?
So I can try to make something similar.
Thanks in advance.
I didn't know that.
Is it all shielded, just like the N64 cartridges?
Could you please show some pictures?
So I can try to make something similar.
Thanks in advance.
Re: Help with Starfox problems
Incidentally the Super Mario RPG cart also has one in the same place. So it might exist on all expansion-chip carts. That could also explain why these carts are more finicky since there might be a weird ground loop. If someone creates a new cartridge plastic they might not realize this.
I come from the net. Through systems, peoples and cities to this place.
Re: Help with Starfox problems
Thanks!
It's working fine now, but I think I should try to implement this shielding to avoid future problems.
It would be easier if I found someone selling a StarFox's shell only.
I would buy it complete, if it wasn't costing a kidney!!
By the way, I just put a clockgen I found floating around... 28.570Mhz, a slight overclock!
Some people say the game becomes smoother, but I saw no difference besides a faster moving ship and the intro sound not playing to the end.
Maybe it's me, but I think it's better as it was designed to be.
It's working fine now, but I think I should try to implement this shielding to avoid future problems.
It would be easier if I found someone selling a StarFox's shell only.
I would buy it complete, if it wasn't costing a kidney!!
By the way, I just put a clockgen I found floating around... 28.570Mhz, a slight overclock!
Some people say the game becomes smoother, but I saw no difference besides a faster moving ship and the intro sound not playing to the end.
Maybe it's me, but I think it's better as it was designed to be.