Reddit mentions of Mcbazel Replacement Xbox Controller to PC USB Adapter Cable [NOT for Xbox 360 or Xbox One]

http://www.amazon.com/Xbox-Controller-PC-USB-Adapter-Cable/dp/B000RT2868

Not saying to get this, it was just the first result on google. Mostly just letting you know adapters like this exist and are pretty common.

You'll also need to find a driver for it, as I doubt Windows will be able to do something like that automatically.

Nice on being able to keep that pad! I recently was able to get a Cobalt Flux as well so I was in the same spot you were. The Cobalt Flux should have a control box attached like here. Since there are both PS2 and Xbox ports, you can either get a PS2 adapter or an Xbox adapter. If you want to go the PS2 route you can get a Super Joy Box 3 Pro adapter. Personally I went the Xbox route. For the Xbox port, I bought 2 cables. An Xbox breakaway cable, and a Xbox Controller to PC USB adapter. These have worked like a charm for me. It doesn't have to be these exact ones but these are just the ones I used. I'm not too sure on the specifics of lag but it operates fairly well for me. Hope this helps.

> The original Xbox controller was my first experience with that, it helped that it was ginormous and easy to handle

It's back, you know? They remade it for X1/Win10. Though the original was usable on PC with some work. You wouldn't be able to do it, but if I knew you I would have done it for you.

https://www.amazon.ca/Female-XBOX-Controller-Adapter-Cable/dp/B000RT2868

you can also buy an adapter <link>

the orginal xbox controller is a usb device. Just not HID spec device. As others have said you can just strip the cable and splice the wires.

It's how I transferred saves from my PC to my Xbox!

http://www.amazon.com/Female-XBOX-Controller-USB-Adapter-Cable/dp/B000RT2868

Speaking of OG Xbox cables, I found a OG xbox to usb adapter on Amazon for $12 (was $7.42 plus shipping totalling to $13 after tax).
It works in conjunction with the XBCD drivers for xp
and 7-10

x360 controllers are miles ahead of the original xbox controller. You should really get a X360 controller instead of all the hassle to get your old controller to sorta works.

or get an adapter

http://www.amazon.com/Xbox-Controller-PC-USB-Adapter-Cable/dp/B000RT2868

Mizar Replacement Xbox Controller to PC USB Adapter Cable https://www.amazon.com/dp/B000RT2868/ref=cm_sw_r_cp_apa_y-5WAb4FEW5AQ
This should work fine with an original controller

This is cheaper than a new 360 controller, and doesn't require creating a new USB interface for the old controller: XBOX Controller to PC / MAC USB Cable Adapter

I'd recommend to hook it up to a PC instead. The cables to do this are very cheap (Sometimes as low as $1, however, this is currently the cheapest I could find).
Then you can look at the actual data being send and do some actual experiments.

As almost all of the controller will be digital, a meter or PSU won't help much. I wouldn't even attempt to hook up the ATX PSU as you might break the controller (which is no longer produced, so we should consider preservation).

If you take any photos or figure anything out, you should document it somewhere. Ideally you'd do this somewhere fitting at http://xboxdevwiki.net . If you don't feel confident documenting this properly, still take good pictures of the insides (and explicitly allow us to use them) and tell us about it somewhere. If the chip labels are not readable in the photos, you should also write them down. Someone else will then probably add it to the wiki then.

The frontpage of xboxdevwiki also mentions places where knowledgeable people hang out, so I'd recommend going there if you are going to do this.

or.....

http://www.amazon.com/Xbox-Controller-PC-USB-Adapter-Cable/dp/B000RT2868

Adapters do exist for this purpose, but YMMV. Try this one I found:https://www.amazon.com/Mizar-Replacement-Xbox-Controller-Adapter-Microsoft/dp/B000RT2868 Original Xbox emulation is almost impossible though, Cxbx only runs a few games at medium speed

http://www.amazon.com/Xbox-Controller-PC-USB-Adapter-Cable/dp/B000RT2868

http://www.amazon.com/Xbox-Controller-PC-USB-Adapter-Cable/dp/B000RT2868/ref=sr_1_1?ie=UTF8&qid=1414686757&sr=8-1&keywords=xbox+to+usb+adapter

other usefull links
http://mwomercs.com/forums/topic/7801-steel-battalion-controller-and-win-7-64-bit-drivers/

The devs at Star Citizen also recently posted they were trying to get it to work in game

http://www.amazon.com/XBOX-Controller-MAC-Cable-Adapter/dp/B000RT2868

Cheaper solo xbox adapter