MultiTap/TurboTap protocol and/or schematic

[xantoz]

Hi, lurker posting for the first time

I currently have a project making myself some wireless controllers for various retro consoles (yes, yet another one of those). Thus far I've gotten a PoC SNES sender (I just use the extant shift register in the controller, so it would be possible to just make a plug-in box to make un-modified controllers "wireless") and receiver working. In addition I intend to use a unified over-the-air protocol making controllers interchangeable between different consoles.

I'm currently looking to implement the receiver side for PCE, and as I would like the ability to support several controllers to one receiver at once (the nRF24L01 I am using natively supports 5 RX pipes, how convenient!), it would be nice to implement a native multitap in firmware at the receiver end. This way I do not need to have 5 plugs coming out of a box into a multitap into the PCE. I am trying to implement as much as possible in firmware, to keep the count of external components low.

However, while I have been able to find documentation and schematics on the PCE pads (including ones with turbo functionality and the 6-button pad) I have found none on the multitap.

If anybody has any clues it would be helpful. Right now my only idea is to hook up a logic analyzer to the multitap and observe it in action.

[thesteve]

Hi, lurker posting for the first time

I currently have a project making myself some wireless controllers for various retro consoles (yes, yet another one of those). Thus far I've gotten a PoC SNES sender (I just use the extant shift register in the controller, so it would be possible to just make a plug-in box to make un-modified controllers "wireless") and receiver working. In addition I intend to use a unified over-the-air protocol making controllers interchangeable between different consoles.

I'm currently looking to implement the receiver side for PCE, and as I would like the ability to support several controllers to one receiver at once (the nRF24L01 I am using natively supports 5 RX pipes, how convenient!), it would be nice to implement a native multitap in firmware at the receiver end. This way I do not need to have 5 plugs coming out of a box into a multitap into the PCE. I am trying to implement as much as possible in firmware, to keep the count of external components low.

However, while I have been able to find documentation and schematics on the PCE pads (including ones with turbo functionality and the 6-button pad) I have found none on the multitap.

If anybody has any clues it would be helpful. Right now my only idea is to hook up a logic analyzer to the multitap and observe it in action.

OK I recently actually did this
The pce has 2 outputs and 4 inputs on the port
On 1 controller the line simply enables the controller or swapped but in the tap one causes a counter to select the next controller, and the other resets the count
The counter needs to loop after last controller

Sent from my HTC One_M8 using Tapatalk

[xantoz]

So the enable line is held low, and you switch controllers as the select line ticks, resetting as enable goes high? Similar to how the 6-button pad sends DPAD all pressed and III IV V VI every other enable pulse?

[Necromancer]

I'm too dumb to help with any tech stuffs, so I'm just here to say welcome aboard and good luck with your project.  I like my wireless PCE pads, but I'd love a modern wireless controller (no line of sight shat).

[thesteve]

[thesteve]

thats the 2port, but the 5 should be easy to extrapolate from it
note that those switch chips cant be stacked but i found some that can

[ClodBuster]

Schrödinger's switches can't be stacked and can.



By the way, I like this project.

[thesteve]

I drew this up when I started my cordless project