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Member Since 27 Oct 2006
Offline Last Active Jun 17 2013 10:45 AM

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In Topic: Gamecube to Game Boy Micro Cable - Instructions in here

13 June 2013 - 10:46 PM

My cable arrived yesterday and I'm very certain that those are original Nintendo cables: They have triwing-screws, the soldering looks decent, there's the same IC in them and it even had the plastic bag tube. As cheap as that last one may sound, "lots and lots of transparent plastic bag tubes" is something fakes rarely do.
I don't know where this seller dug out the masses of cables he sells (maybe I should ask him) but I'm thinking of ordering some more - just to have a small reserve.

I'm not sure if I follow you. The plug that cascades (is that what you mean?), that should be the master? Does it matter which side is used for the GC connection?

English is not my native language so at points, my explanations may sound a bit "off".. Sorry about that.

Two-player-cables have a master and a slave side. In most games, it's the master that has to confirm the connection (press a when all players are ready); in single-cartrige-multiplayer, it's him sending out the game to the others. It's also called 1P on cables (because "master/slave" is a computer term that may sound strange to players). With the plug in the middle you can connect an additional cable so that a third player may join. Attach another cable to the plug in the middle of *that* cable and you can have four players.
Plugging stuff behind each other sometimes is also called "daisy-chaining" but I've learned the more technical term "cascading" for it.

But you can only fit another cable with one of the two ends - the other has the plastic to block. That's because an additional cable will only work in one "direction" (master->slave) and Nintendo has to make sure that stupid children don't connect the "slave"-side of such a cable to the connector plug. Just imaginge you cut the 4-player-wiring diagram after player2 but clone the two-player cable and have to attach it somewhere.

Both side should contain all necessary wires (I remember using one for a general-purpose-GBA adapter and the other one for a Gamecube link) so it shouldn't matter which side you use. The one with the additional plastic may seem more suited for a Gameboy Micro but if you use a hard plastic case while playing, it may block the way.

I do think I saw an image of an original cable, which had a cascading plug as well.

Yep. I have found one of those for the "big" connectors as well (but without IC). It makes quite some sense: You don't have two open ends if you only play with two players and if every Gameboy owner has one cable, you can connect all of them.

I'm still pondering how to continue now, together with the 'neue' gc-link cable. Should I just cut off one side and solder that?

I'd recommend de-soldering the wires on that side - it's just a lot cleaner.

First of all, you should double-check where the solder pads from the gamecube-cable go to. Best to note down the number and position on the board and the number and position on the GBA plug.

If it really is the same as the "Neue Version", the wire at Pad '1' should be red and connected to Pin6 at the GBA-Plug; wire at '3' should be brown at Pin2 on the GBA, '5' blue and Pin3 on GBA and '6' white and Pin1 at the GBA - but double-triple-check this.

Next, you should double-check which wire from the GBM-cable corresponds to the GBM plug.

Based on the theory that all Nintendo-cables are the same, this picture could help you:
1: blue (unconnected in picture); 2: red; 3 orange (in yellow plug); 4: brown (in white plug) 5: green; 6: shield (in black plug). (note that the first row is 1,3,5 and not 123 - it got me confused for a moment)
but double-triple-check this. *anything* to shield (6) should never be less than zero V. Shield to power (Pin1, possibly blue) should be about 3.3V at all times.

I don't recommend just believing the info on the site and connecting the blue wire to the '6'-pad, orange wire to the '5'-pad, red wire to the '3'-pad and shield-wire to the '1'-pad.

wire 4 and 5 (maybe brown and green) cannot be connected to the Gamecube-board, so cut them off and maybe insulate them so they never accidently connect to anything or each other).


And what exactly do you mean with keeping the plug and building a breakout box for easy testing and soldering? (I'm trying to visualize, but I fail   ^^ ).

I mean something like this:


With this you can easily check which wires are connected to which pin on the GBM - so it helps with the double-triple-checking. I just used mine to verify the wire colors, again.

If you need me to check anything, just let me know. I'm no star in the IC department, so I can't really brainstorm with you there unfortunately.

The real nature of this IC is not important, anyway. It just puzzles me a little but I can live with not knowing..

hmm.. After having dug out this stuff, I really think I should catalog what I have left here and maybe build another cable while video-documenting it... I think I remember other people asking for them, too.. That page could use some updated about the link cables as well...



In Topic: Gamecube to Game Boy Micro Cable - Instructions in here

06 June 2013 - 02:31 PM

Ah, I understand it are 'Nintendo' screws. Good to know. Somehow my father-in-law managed to open it with a Philips screwdriver (though I doubt that has a positive effect on the screws). But surprise suprise, it has got all pins wired!

I'd love to open my cable and take a look - but unfortunately, it hasn't arrived yet. I also think I still have an original cable so I could compare them.

For some reason the seller also offers bundles of 10 or even >50 of these cables. Either there really is a new production site (seems rather idiotic without that much demand) or he has gotten hold of some forgotten Nintendo storage hall.

Thanks for the pictures. This really looks a lot like the "official" cables I remember - it even has an IC. There are five "regular" wires. I guess, the sixth one is GND. The orange one could be SerialIn (it's connected to GND on the "right" side).

I still wonder what the IC is for - Master/Slave seems to be fixed. You might also note that only one of the plugs could be used to cascade - the other one has this additional plastic (and therefore should be slave). I'm not sure whether the original cables have this, too - need to check when I get home.

If you take this apart, you might want to keep the plug and build a breakout-box - this makes testing and soldering other cables a lot easier! Or you could build an adapter from "classic" GBA-plug to "GBM"..



PS: I see that you added a screenshot of my page to your photos. At first I was surprised and not too excited about it, but I agree that it makes sense there - people who look at the pictures might find that table helpful.
Still, would you mind adding a reference to my page or this thread so that people can find more information on this project?


Update: It seems like I don't have such a cable left. I still had one of those "middle" boxes (just desoldered the cables) and it looks exactly like your pictures. So I guess those are original cables - or new ones built exactly like the old ones.

I still don't know about the IC. It seems like this is a KS125 from Texas Instruments (http://www.ti.com/li...n74cb3t3125.pdf) - a component with four switches (connects two pins if a third pin says so).

Still it would be wired strangely if it is.Voltage seems to be disconnected, 2A and 2B are connected to GND - but it can be switched whether they can be connected to each other...


Maybe it switches off the 3P-Plug if there is no cable.. Or it is used for voltage translation - ensuring that even serveral cables the voltage still stays okay. I never had much trouble without it.

In Topic: Gamecube to Game Boy Micro Cable - Instructions in here

13 May 2013 - 02:08 PM

Ah man, I thought I was so close, now we're discovering my GBM link cable doesn't have pin 2 wired? :(

Sorry for not remembering this earlier. It really has been a long time but this was the main reason for ordering the 4-player-cables. I hoped to get at least two usable plugs but found myself with four of them.

To be sure that the cable is not usable, you could check the other part for whether the two pins are linked together.

Maybe I can try this mod: http://destudenten.s.../gamecube-kabel

From what I can read (somehow, the google translation is less readable than the original nederlandsk), the main idea is scraping off the plastic to get to the plug directly and then soldering the wires to the plug directly. I never quite managed to do this without completely wasting the plug but as a "last resort" it should always work.

Or does anyone here have a plug/cable leftover? =)

I still have some parts left but I guess the shipping from germany might be more than getting a suitable cable from another source.

Seems like some Chinese factory decided to make the 'official' cables again, they're all over eBay, for cheap prices: http://www.ebay.co.u...ME:L:OC:NL:3160

I'm not sure whether this is a real rebuilt of the original cables or simple a cheap two-player-cable with some (non-electronic) black block in the middle. If someone tried buying this, I would be interested in more information. I think I'll have to test this out.
They ship to germany for free. I'll try one and report back once I have more info.



In Topic: Gamecube to Game Boy Micro Cable - Instructions in here

11 May 2013 - 08:19 PM

Ok, someone helped me out with an ohm meter, and this is the result of my 4-wired 3rd party GBM link cable:
brown wire = pin 6 (Ground)
green wire = pin 5 (Serial Clock)
blue wire = pin 4 (Serial Data)
white wire = pin 3 (Serial In)

Colors can be different from cable to cable. So don't worry too much if those wire colors don't match any from a given other cable.

I remembered something else about this cable stuff (it's been a long time. Sorry for not thinking about this, earlier): The connection between GBA and Gamecube only needs four wires in many cables 1,2,3,6 (with 1 being power and being replaced by the cube-connection).
On the other hand, wire 2 (Serial Out) is really needed for communicating with the gamecube.

If you only got a 2-player-link-cable: cheap cables often don't have wire 2. Master and Slave are hard-coded into the wire with 3(SerialIn) and 6(GND) crossed on the "master"(p1) side. I believe that's how the GBA "knows" that it is master - whereas the slave "sees" a real signal on SerialIn (Master.SerialOut).

Take a look at the "Link 4 Spieler"-image, ignore everything after Sp.2 ("Spieler 2" = "Player2" = slave) and imagine you want to produce a very cheap cable - no need to include Sp2.SO (wire2) anywhere.

Sadly, this means that many cheap 2-player-link-cables cannot be used for the GBA-conversion: You cannot access Master.3 (it's connected to GND); you cannot access Slave.2 (it's not an outside wire).

Your best choice is to search for 4-player-cables. At minimum, the plugs for Player2 and Player3 will have all necessary wires.
Also, at that point, capitalism strikes again and having the same plug four times is cheaper than a 2,1,1 distribution. I believe that all of my GBM-four-player-cables had all four plugs the same and usable for conversion.



In Topic: Gamecube to Game Boy Micro Cable - Instructions in here

08 July 2012 - 03:11 PM

Instead of desoldering the wires, can I also cut them and solder the GBM wires to them?

I guess you could.. but I always considered wiring to the pads easier than soldering wires together, using shrinking tube etc.

Ok, I've got the GBM cable open now. I have to re-read everything, but I'm afraid I'm a bit stuck then, since it's not an official GBM link cable and I have no clue which wire is which pin...

I think your best choice is to take an ohm-meter (or anything else that beeps when the testing pins are electrically connected) and then check with the pins on the connector plug. If you somewhere get a gbm-link-plug (e.g. broken GBM; link-cable with box), you could build a breakout-box allowing to measure at the bananaplugs.