Turbografx / PC Engine dual controller adapter project

[HoocasLenkels]

Hello folks. So I have some vacation time from work I'm using before the end of the year, which means I have a bunch of free time. I decided to make a "universal" controller adapter for all the delicious Obey. 

It's not finished yet exactly, thinking of cleaning up the internals. I have a few questions, since I'm not familiar with these controllers. I know they're different from other controllers, and by that I mean the system polls each pin for one button press or the other, as opposed to clock, latch, etc. That being said, I added a mode switch temporarily, along with indicator LEDs to display which output mode is activated. I connected the LEDs to the 5v pins but regardless of the switch position, both outputs work. I guess there's no real need for it, but I live in 'Murrica and I do what I want for science reasons.  So if anyone would know which pins I would need to switch on or off to disable the one controller output, it would be appreciated.

Here's a few WIP pics. Please excuse the hot glue until I find some epoxy... Anyone else ever do something like this? I know its a little bulky, but i don't really mind.

[thesteve]

the system outputs 2 signals (count and reset)
it receives 4 from the controller
with 1 controller the count pin enables the chip in the controller
you need to set it up so it steps through the controller enable pins