Famicom/NES Expansion Port?

[Tempest]

Ok this is a REALLY obscure question, but does anyone know if it is possible to hack an adapter for the expansion port on the bottom a Toaster NES so that it is compatible with the expansion port on the Famicom? I'm not sure if all the address lines are in the NES expansion port, or if it is even remotely the same as the Famicom one. The reason I ask is that I'd like to hook my Family Basic keyboard up to my NES, but it uses that funky expansion port. I know someone managed to hack it so that it was able to read the two extra controllers (similar to the NES Satellite or Four Score), but I've never read anything about getting Famicom accessories to work.

 

Tempest

[gannon]

yeah, just pick up a schematic of the nes and the pinouts to the nes and famicom exp. ports and you should be all set.

[gannon]

Here's a few I found on nesdev.

         _______

        |*      

VCC   >01]        [48<  VCC

VEE   >02]        [47<  VEE

AIN   >03]        [46]  --

/NMI  [04]        [45>  C.2

CA15  <05]        [44>  C.1

(51)  [06]        [43>  C.0

(52)  [07]        [42]  (16)

(53)  [08]        [41]  (17)

(54)  [09]        [40]  (18)

(55)  [10]        [39]  (19)

/C2R  <11]        [38]  (20)

C1.1  >12]  EXP.  [37>  /C1R

C1.3  >13]  PORT  [36>  C1.4

/IRQ  [14]        [35>  C1.0

C2.2  >15]        [34>  /C1R

C2.3  >16]        [33>  C1.2

/C2R  <17]        [32]  D0

C2.4  >18]        [31]  D1

C2.0  >19]        [30]  D2

C2.1  >20]        [29]  D3

VOUT  <21]        [28]  D4

AOUT  <22]        [27]  D5

VDD   <23]        [26]  D6

4MHZ  <24]        [25]  D7

        |_______/

----------------------------------------------

           _             

   (pin #1) (9)         

    GND  |Po|  PORT1-CLK  

  SOUND  |Po|  OUT2     

    IRQ  |Po|  OUT1       

PORT1-D4  |Po|  OUT0(STROBE)

PORT1-D3  |Po|  PORT0-D1  

PORT1-D2  |Po|  PORT0-CLK   

PORT1-D1  |Po|  +5V        

PORT1-D0  |P/(15)          

        (8)/                

                   

[Tempest]

So it IS possible? Hmm... I think building an adapter would be beyond me though. As anyone tried such a thing?

 

Tempest

[Great Hierophant]

You will need a 50 pin male cartridge connector and a 15 pin male gameport.

[Tempest]

You will need a 50 pin male cartridge connector and a 15 pin male gameport.

 

And if I wire that up it would work? Hmm... I may have to have a friend make something like that for me. I'd like to use my keyboard and 3-d goggles.

 

Tempest

[Tsukasa]

Here's the nes schematics if you need them.

nesschema.zip

[Ferris]

While were on the topid o NESf schematics, does anybody have schematics for the SNES / Super Famicom? And for that matter the Neo Geo?

[Tsukasa]

Here's the schematics for the Snes.

snes_schematics.zip

[hex65000]

Okay, first of all, you're my hero. I've been wanting some base schematics of the NES/SNES for a while. You wouldn't happen to have any Genesis drawings up your sleeve too?

 

Hex.

[ Man, next thing you know I'll be asking for world peace or something... ]

[Tempest]

If someone could try and wire up an adapter for me I'd be extremely grateful. I would also compensate them for time and parts. Unfortunately I'm not a hardware person...

 

Tempest

[Inky]

Hold on..

 

NES 3-D goggles?

 

[Tempest]

NES 3-D goggles?

 

Indeed. Unfortunately not many games supported them.

 

http://assembler.roarvgm.com/Famicom_3d_go...3d_goggles.html

 

Tempest

[JB]

Mmmm, LCD shutters.

[keilbaca]

How are you able to incorporate 2 more controllers? This would be a cool mod for my overclocked NES

[Tsukasa]

Okay, first of all, you're my hero. I've been wanting some base schematics of the NES/SNES for a while. You wouldn't happen to have any Genesis drawings up your sleeve too?

 

Hex.

[ Man, next thing you know I'll be asking for world peace or something... ]

 

Google is my friend.....

[Blur2040]

NES 3-D goggles?

 

Indeed. Unfortunately not many games supported them.

 

http://assembler.roarvgm.com/Famicom_3d_go...3d_goggles.html

 

Tempest

 

I hate to sidetrack things, but...ASSEMbler has moved to:

 

www.assemblergames.com

 

Roarvgm no longer exists, and the old ASSEMbler pages won't be there soon...but the new ASSEMblerwebsite is great. It is THE place to go if you have any interest in obscure game hardware including Development hardware and Imports.

 

Odds are you could probably find somebody there to build your adaptor too...or find somebody who'll know exactly how to do it...or find somebody who has a better solution. Theres some real hardware gurus there.

 

The forum is filled with megacollectors, and of course, everybody is welcome.

[Tsukasa]

Okay, first of all, you're my hero. I've been wanting some base schematics of the NES/SNES for a while. You wouldn't happen to have any Genesis drawings up your sleeve too?

 

Hex.

[ Man, next thing you know I'll be asking for world peace or something... ]

 

Here's your genesis schematics. http://cgfm2.emuviews.com/gen.php

[Tempest]

Mmmm... Bumping old post goodness...

 

My request for help still stands. I'd like to be the first (and probably the only) person to use a Famicom Keyboard on a US NES.

 

Tempest

[JB]

I'm surprised it wans't mentioned before, but...

The NES and FamiCom expansion ports aren't even remotely related.

 

It'd be more appropriate to wire an adapter from the NES controller ports. But it's possible that all the lines you need for a full FamiCom expansion port arne't brought out, or that there'll be conflicts between your gamepads and the connected expansion(as the FamiCom expansion expects you to use the non-existent hardwired controllers).

[Tempest]

I'm surprised it wans't mentioned before, but...

The NES and FamiCom expansion ports aren't even remotely related.

 

It'd be more appropriate to wire an adapter from the NES controller ports. But it's possible that all the lines you need for a full FamiCom expansion port arne't brought out, or that there'll be conflicts between your gamepads and the connected expansion(as the FamiCom expansion expects you to use the non-existent hardwired controllers).

1022663[/snapback]

 

Are you sure about that? I've read in several places that although they're not identical, the ports are related and an adapter could be made.

 

Tempest

[JB]

I'm surprised it wans't mentioned before, but...

The NES and FamiCom expansion ports aren't even remotely related.

 

It'd be more appropriate to wire an adapter from the NES controller ports. But it's possible that all the lines you need for a full FamiCom expansion port arne't brought out, or that there'll be conflicts between your gamepads and the connected expansion(as the FamiCom expansion expects you to use the non-existent hardwired controllers).

1022663[/snapback]

 

Are you sure about that? I've read in several places that although they're not identical, the ports are related and an adapter could be made.

 

Tempest

1022674[/snapback]

Reasonably so. The US expansion connector consists mostly of cartridge lines. The J connector consists of controller inputs mainly.

 

*looks it up*

 

And holy crap, was I wrong. The NES expansion port DOES have the various controller pins in it, they're just buried in my head by all the extra stuff.

...

Hell, it's got the external audio tap on it too.

[Tempest]

I'm surprised it wans't mentioned before, but...

The NES and FamiCom expansion ports aren't even remotely related.

 

It'd be more appropriate to wire an adapter from the NES controller ports. But it's possible that all the lines you need for a full FamiCom expansion port arne't brought out, or that there'll be conflicts between your gamepads and the connected expansion(as the FamiCom expansion expects you to use the non-existent hardwired controllers).

1022663[/snapback]

 

Are you sure about that? I've read in several places that although they're not identical, the ports are related and an adapter could be made.

 

Tempest

1022674[/snapback]

Reasonably so. The US expansion connector consists mostly of cartridge lines. The J connector consists of controller inputs mainly.

 

*looks it up*

 

And holy crap, was I wrong. The NES expansion port DOES have the various controller pins in it, they're just buried in my head by all the extra stuff.

...

 

1022722[/snapback]

 

You can make it up to me by building an adapter...

 

Hell, it's got the external audio tap on it too.

 

Does that mean that you could get the extra sound channel from the FDS to play on a NES?

 

Tempest

[JB]

I'm surprised it wans't mentioned before, but...

The NES and FamiCom expansion ports aren't even remotely related.

 

It'd be more appropriate to wire an adapter from the NES controller ports. But it's possible that all the lines you need for a full FamiCom expansion port arne't brought out, or that there'll be conflicts between your gamepads and the connected expansion(as the FamiCom expansion expects you to use the non-existent hardwired controllers).

1022663[/snapback]

 

Are you sure about that? I've read in several places that although they're not identical, the ports are related and an adapter could be made.

 

Tempest

1022674[/snapback]

Reasonably so. The US expansion connector consists mostly of cartridge lines. The J connector consists of controller inputs mainly.

 

*looks it up*

 

And holy crap, was I wrong. The NES expansion port DOES have the various controller pins in it, they're just buried in my head by all the extra stuff.

...

 

1022722[/snapback]

 

You can make it up to me by building an adapter...

Or not.

 

Aside from not having a source for the NES-side connector, I lack a way to test it.

 

Hell, it's got the external audio tap on it too.

 

Does that mean that you could get the extra sound channel from the FDS to play on a NES?

 

Tempest

1022727[/snapback]

Should be able to.

It'd be at least a little less kludgy than running wires out of the NES/FC cart adapter and hooking to the RCA port on the side of the deck.

As I understand it, the FamiCom runs end-stage audio to the cart slot, so a tap off that running back to the cart would work, but... it's messy.

 

This way you just drop a wire from your FC adapter down to the expansion connector's audio-in. With a little creative modding, you could run the wire through the case for a cleaner install. FC adapter could connect to a mini-headphone plug right inside the cart door that was wired to the expansion port.

 

...

 

Wish I had the stuff to test some of these ideas.

Right now I've got no FC carts, no FC peripherals, and no spare NES to fall back on if I blow one up while learning to solder.

[Atariman]

Wish I had the stuff to test some of these ideas.

Right now I've got no FC carts, no FC peripherals, and no spare NES to fall back on if I blow one up while learning to solder.

 

Well... I'm kinda interested in doing something to this effect... I recently picked up a spare NES (I had been meaning to sell it) and I also happen to have a spare RAM cart for the FDS along with a few broken famicoms. If I manage to get some time to look over the famicom and NES schematics, I guess it would be technically possible to wire up a completely 'Famicom'ed NES (although it would be a major pain)

 

I'm fairly certain that I wouldn't have any time for a project like that until May/June though...