Famicom and NES controller modding

[Drakon]

I really like how my twin famicom controllers look so I decided to mod them to fix things that bother me.  I performed the following mods:

1: Relocated the cord so it comes out a hole in the top of the case instead of the side

2: Wired the controller into a nes controller port

3: Modded the pcb so it can work with extension cords

After wiring up this pad I quickly discovered that it wouldn't work with extension cords.  I probed my extension cord it's wired right so I took an educated guess that too much distance messes up the control pad signals.  It's safe to assume this considering this controller is meant to be hardwired into a famicom without extension cords.  My dogbone nes controllers which I've used for years work fine with as many extension cords as I like in between the control pad and the system.  I decided to compare the dogbone pcb to the pcb found in all hard wired famicom controllers / original rectangular nes controller.  The big difference I discovered is in the dogbone controller there's two 3.6k ohm resistors connected to vcc and the other ends connect to cup and out 0.  I added 3.6k ohms of resistance on my twin famicom controller pcb between these two spots and sure enough that fixed the controller cord length issue.  Here's a quick schematic of the mod:



I apologize if this mod has been posted before I never came across it.  Here's what my twin famicom pad looks like:





Feel free to add any interesting mods that can be done to control pads for either the nes or famicom.