Famicom / Famicom Twin Controller port mod

[Goldenbubbles]

Hi everyone,

I have both a Famicom & Famicom twin , we all know both have short cables and they both have a 15min expansion port. I need a solution to hardwire them so a Standard NES 9pin or / Super Famicom port

I've seen someone which did a 3D print on both sides of the Famicom for p1 and P2 (mic functions) and the nice 15min front and side converters but not all games support that port.

Can anyone point me to links / info where I can find diagrams so I can make the modification?

Thanks to all in advance

[P]

Famicom Controller Port Pinout (viewed from front of FC PCB):

 Port I     Port II
  _____     ______   
 |12345|   |123456|
  ¯¯ ¯¯     ¯¯  ¯¯
P I   1: +5V, 2: <CLK ($4016), 3: <Output D0 (strobe), 4: >Input 0 D0, 5: GND
P II  1: +5V, 2: <CLK ($4017), 3: <Output D0 (strobe), 4: >Input 1 D0, 5: GND,
      6: Input 0 D2 (Mic)

      >: input   <: output   <>: bidirectional

Here are the Famicom's internal controller ports.

NES Controller Port Pinout (viewed from front of NES console):

 Port I                             Port II
                 _                                  _
         GND -- |1\                         GND -- |1\
 CLK ($4016) <- |27\ -- +5V         CLK ($4017) <- |27\ -- +5V
   Output D0 <- |36| <- Input 0 D3    Output D0 <- |36| <- Input 1 D3
  Input 0 D0 -> |45| <- Input 0 D4   Input 1 D0 -> |45| <- Input 1 D4
                 ¯¯                                 ¯¯
Output D0 is the strobe on controllers.
HVC-101 has the same ports as NES but is missing D3 and D4.

Here is the NES controller port pinout. Ignore D3 and D4 as they are not found in the Famicom's controller port.

Controller Port Pinout (viewed from front of SFC console):
  Port I      Port II
 765 4321    1234 567
(OOO|OOOO]  [OOOO|OOO)

P I   1: +5V   2: <CLK ($4016)  3: <Output D0 (strobe)     4: >Input 0 D0
      5: >Input 0 D1            6: <>PP                    7: GND
P II  1: +5V   2: <CLK ($4017)  3: <Output D0 (strobe)     4: >Input 1 D0
      5: >Input 1 D1            6: <>PP & light-gun latch  7: GND

  >: input   <: output   <>: bidirectional

And the SFC controller port pinout. Ignore D1 of both input ports and PP (and light-gun latch) as none of them exist in the Famicom's internal controller port.


Just match +5 V, GND, CLK, Output D0 and Input D0 for each controller, then you just need a connector for the mic.