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controlling two nes decks from one controller.... Options · View
bod
Posted: Saturday, August 06, 2005 1:30:03 PM

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hello, i'm a newbie here, but i was hoping you might be able to help me with a project i'm working on.

i've searched the forums but couldnt find anything relating to what i'm after, so thought i'd ask. :D

i'm working on a project, which is a circuit bent nes(whic is finished, infact this is my 5th deck i've built for someone) and need to find a way to control two nes decks with one controller for an interactive art installation for someone. i've tried a number ofg things, but so far they've all failed.

i want to play the same game, mario for example, on both nes decks, one of which is circuit bent and hooked up to a projector, the other being hooked up to a tv, so you can play it as normal, and project the bent visuals from the ohter deck for the crowd to see.... (crazy i know)

does any one have any tips? i'm about to connect one controller with two cables, and disconnect the ground and 5volt supply from one consol, but i thought i'd see if anyone else has managed this and has got anything to say on the mater, apart from the fact its maddness. :wink:


cheers in advance,


bod.
Roth
Posted: Saturday, August 06, 2005 2:56:48 PM


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Location: Danville, IL
I'm a bit confused about this. You need to control two NES decks at the same time, so you can put one of the NESs on a projection screen? If that's the case, couldn't you figure out a way to just use a single NES and utilize both the RF and also the composite outputs (considering you're using a toaster, that is)? Unless this is all for the sake of doing it with two NESs ;)

I tested it and it does work with both TVs, so I imagine you could use the composite to go to something hooked up to the projector... or something.



http://robertlbryant.com
bod
Posted: Saturday, August 06, 2005 3:20:30 PM

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maybe didnt explain that very well... sorry.

the first deck will be circuit bent, and when activating the bends/switches/patch bay on this deck, it renders the game unplayable, due to the fact the glitches on the screen are so intense its a jumbled mess of 8bit maddness with mario running arround.... because of this you can't play the game, and in the past i have used the play back scripts on a pc to play a movie of the game by sending prerecorded control pad signals to the nes decks via a link cable from the pc to the game pad port, while palying arround with the bends.

with the project i'm doing, the guy wants people to be able to play the game normally, yet in order to do this, i need to have two decks, one bent, one not, but i need to have the same game being bent at the same time to a different out put. so in effect, one player playing two consoles simutaniously.

so i need to have one normal nes hooked up to a tv to be played as normal, and the same control movements from that being duplicated on the bent nes deck, running the same game.... is that better? sorry for the confusion. :oops:
Luke
Posted: Saturday, August 06, 2005 4:17:17 PM


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Joined: 12/13/2004
Posts: 3,577
Location: Ontario, Canada
Your theory about connecting one controller to two consoles will work. You'll just need to leave out the power pin from one of them, as that would run 10v into the controller, and likely fry the IC.

So I suggest just building an adapter, and neglecting to connect the power pin in one of them, since you wouldn't want to permanently disable that pin in the actual console.

I'm interested to know just what this "circuit bend" involves though, I still don't know exactly what you mean...

bod
Posted: Sunday, August 07, 2005 8:33:30 AM

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hi luke, cheers for the advice, thats what i thought as well about leaving the 5v pin out, i'll give it a go this after noon.


circuit bending is basically taking old electronics and short circuiting them to create something different. normally its done with old drum machines and speak and spells, but i found a way of shorting the game chips in the cartridges to use for visuals for night club events and art instalations.

here's a few screen shots from some one else, i dont have a capture card for my computer yet.







these images dont really do it justice though.... :D

also this guys site provides an insite to the kinda thing i can create.

http://audiovideo.sevcom.com/rom.html


cheers for the help guys, i'll let you know how i get on.


bod. :D
TheTurnipKing
Posted: Sunday, August 07, 2005 9:25:29 AM


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Posts: 167
If it does that to the graphics, What does it sound like?
bod
Posted: Sunday, August 07, 2005 1:11:51 PM

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amazingly no different!!! :lol: the sound chip is inside the nes from what i can tell, and the cartidge sends the signal to it, but thats in the chip i dont touch as it starts crashing the game.
bod
Posted: Sunday, August 07, 2005 1:49:03 PM

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just tested my adapter thingy... works a treat! cheers luke. :wink:
Roth
Posted: Sunday, August 07, 2005 2:10:21 PM


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Congrats bod! If you have any other projects, make sure and let us know. You're the first to have something like that. :shock: I think it's pretty funny, the thing that most people try to avoid on the NES (glitchiness etc.), you try to invoke :lol:

http://robertlbryant.com
bod
Posted: Sunday, August 07, 2005 4:00:35 PM

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:lol: ironic eh? cheers roth!

i've uploaded a couple of pictures of what the box/spliter looks like. they are a bit big to put on here so you'll have to follow the links.

http://www.filefarmer.com/vidiot/P7010242.JPG

http://www.filefarmer.com/vidiot/P7010237.JPG

its just a small project box from Maplin, with a hole in one end with a grommet to make it look nice. gotta look professional after all! :wink: and two holes with a grommet each on the other end. on the inside i used a junction box to split each wire into and then connected two sockets(one from the game pad, and one that was butchered from an old controller).

this way i can disconect the 5v wire from one of the sockets so that the game pad doesnt receive 10volts, thus frying the chip in the controller. :D


as for other projects, i've been asked to come up with the mother of all zapper guns for the same guy to use with duck hunt. so i'll be retro fitting some sort of kids bazooka toy with the inards of the zapper. :D i'll let you know how i get on.


cheers guys!


bod.
TheTurnipKing
Posted: Monday, August 08, 2005 6:16:31 AM


Rank: Koopa Troopa
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Joined: 8/5/2005
Posts: 167
"bod" wrote:
:lol: ironic eh? cheers roth!

i've uploaded a couple of pictures of what the box/spliter looks like. they are a bit big to put on here so you'll have to follow the links.

http://www.filefarmer.com/vidiot/P7010242.JPG

http://www.filefarmer.com/vidiot/P7010237.JPG

its just a small project box from Maplin, with a hole in one end with a grommet to make it look nice. gotta look professional after all! :wink: and two holes with a grommet each on the other end. on the inside i used a junction box to split each wire into and then connected two sockets(one from the game pad, and one that was butchered from an old controller).

this way i can disconect the 5v wire from one of the sockets so that the game pad doesnt receive 10volts, thus frying the chip in the controller. :D


as for other projects, i've been asked to come up with the mother of all zapper guns for the same guy to use with duck hunt. so i'll be retro fitting some sort of kids bazooka toy with the inards of the zapper. :D i'll let you know how i get on.


cheers guys!


bod.

Actually, there might be a certain style factor in using a Super Nintendo Super Scope ;)
hunter
Posted: Monday, August 08, 2005 6:55:33 AM

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Location: Dhaka
Hi, bod..
I was wondering, is this a College level project or for something else.
bod
Posted: Monday, August 08, 2005 6:01:34 PM

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no, this all started with muy lust for something a bit differnet.... and geekyness as well i suppose! this project is for a club event, but in a gallery, so its an installation of sorts.
galaxy warrior
Posted: Sunday, August 21, 2005 4:18:47 PM


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crazy man

usa cartoon express
TheTurnipKing
Posted: Sunday, August 21, 2005 6:27:25 PM


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Actually, I had a thought. What would happen if you replaced the CHR chip from, say, Mario with one from, for example Duck Hunt? Of course, the replacement CHR would have to be about the same size, but you'd get one whacked out display.

It might also be interesting if you could figure out a way to "overlay" the circuit bent graphics on top of the "pure" output, and possibly include further , different, Circuit Bent NES overlays.
Luke
Posted: Sunday, August 21, 2005 6:29:45 PM


Rank: Bowser
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Location: Ontario, Canada
"TheTurnipKing" wrote:
Actually, I had a thought. What would happen if you replaced the CHR chip from, say, Mario with one from, for example Duck Hunt? Of course, the replacement CHR would have to be about the same size, but you'd get one whacked out display.


Chances are that it would either refuse to boot, or lock up as soon as it tried to access the graphics.

it could be an interesting thing to try though, just as a "what if" experiment.

TheTurnipKing
Posted: Sunday, August 21, 2005 7:00:05 PM


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"NES-Luke" wrote:
"TheTurnipKing" wrote:
Actually, I had a thought. What would happen if you replaced the CHR chip from, say, Mario with one from, for example Duck Hunt? Of course, the replacement CHR would have to be about the same size, but you'd get one whacked out display.


Chances are that it would either refuse to boot, or lock up as soon as it tried to access the graphics.

it could be an interesting thing to try though, just as a "what if" experiment.

Easiest way to try it out would be to use an emulator as "proof of concept". Split a NES file into it's component chip images, then recombine it with part of another one, or even a raw binary image of the right size pulled from another file (not nessicarily a NES image).

In theory it should work: it's not that dissimilar to what graphic hacks do.
Luke
Posted: Sunday, August 21, 2005 7:38:32 PM


Rank: Bowser
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"TheTurnipKing" wrote:
In theory it should work: it's not that dissimilar to what graphic hacks do.


Well, it is in that graphics hacks edit existing graphics, which are loaded from a specific place in the CHR ROM. Replacing the chip entirely could have you loading PCM samples as sprite data, and that wouldn't go well. :P

phreak97
Posted: Monday, August 22, 2005 3:08:20 AM


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if youre running two nes's with the same game, youll have to make sure theyre exactly the same revision of nes and of the game, otherwise you could get a delay on one of them, meaning they wouldnt be perfectly synced.
also, i dont think connecting both +v lines would hurt it, putting power sources in parallel doesnt increase the voltage, but still.. if it works now, dont change it:P

i'm actually really suprised the controller works on both systems, doing that means it's getting two clock signals, which should mess things around quite alot, unless one nes is syncing to the other one somehow..
TheTurnipKing
Posted: Monday, August 22, 2005 6:46:05 AM


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"NES-Luke" wrote:
"TheTurnipKing" wrote:
In theory it should work: it's not that dissimilar to what graphic hacks do.


Well, it is in that graphics hacks edit existing graphics, which are loaded from a specific place in the CHR ROM. Replacing the chip entirely could have you loading PCM samples as sprite data, and that wouldn't go well.

When you get down it it, they're both binary data. The NES wouldn't be able to tell the difference. Ever loaded a WAV file as a raw image in a paint package? You often just get a nice staticky effect. I figure you'd probably get the same result here, only in a tile based fashion, and importantly, the game would theoretically still be completely playable, only with heavily glitched graphics. The results of replacing one games tiles with anothers though should be... interesting, to say the least :)

Of course, you might well be right that it would just lock up. I really don't know all that much about the NES hardware at the moment.
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