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NEC PC-FX => PC-FX Discussion => Topic started by: elmer on April 04, 2015, 01:47:05 PM

Title: PC-FX joypad port specs?
Post by: elmer on April 04, 2015, 01:47:05 PM

Has anyone actually documented the pinout/protocol anywhere?

I mean the joypad side, not the CPU side (that's already detailed in the PC-FX GA documentation).

There are 7 pins ... 1 power (+5V), 2 ground and 4 data going into an NEC 65612 gate array.

I'm going to assume that that's "reset", "clock", "in" and "out" ... but it'll save a bunch of time screwing around with an Arduino if someone has already documented this somewhere.

Title: Re: PC-FX joypad port specs?
Post by: mickcris on April 04, 2015, 03:12:53 PM

I found this:
http://nfggames.com/forum2/index.php?topic=3701.0

and this:
https://www.assemblergames.com/forums/showthread.php?23216-PC-FX-controller-interface

Title: Re: PC-FX joypad port specs?
Post by: elmer on April 04, 2015, 04:02:33 PM

Thanks!  :D

AssemblerGames is one of my haunts ... but the post there doesn't really say anything useful.

The nfggames post OTOH (where I never go), is absolute gold.

Thanks, that'll save some time.

I suspect that "latch" is really "clear" ... but it should be pretty easy to get the PC-FX's actual timings given that head-start.