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Main => Main Forum => Topic started by: Darren01274 on July 07, 2010, 11:05:33 am

Title: Is there something wrong with my jamma harness!
Post by: Darren01274 on July 07, 2010, 11:05:33 am

acording to the pinout document pin Z a are for 2p button one 2p button two althought nothing is connected to a.

according to pinout also it says v 18 when you look at the connector its 18 R ?

Title: Re: Is there something wrong with my jamma harness!
Post by: BobA on July 07, 2010, 03:12:46 pm

First of all there are 2 sides to a jamma harness one is numbered 1 to 28 and connects to the component side of the PCB.  The other side is A to Z and aa to ff or a to f to give the same 28 choices and connects to the solder side of the PCB.  Pin Z is Player 2 button 1.  V should always be across from 18.  Check your harness and see how it compares to the JAMMA standard.


  Bob Roberts How to wire your harness (http://arcadecontrols.com/BBBB/jh.html)
  Jamma Harness Numbering at Bottom of Page (http://www.jammaboards.com/store/jamma-harness/prod_146.html)

Title: Re: Is there something wrong with my jamma harness!
Post by: rchadd on July 07, 2010, 06:54:34 pm

with jamma note some letters are missing (for example no G or I) think its to avoid confusions

Title: Re: Is there something wrong with my jamma harness!
Post by: BobA on July 07, 2010, 07:26:42 pm

+ 1 for Rchadd

Thanks for mentioning the missing letters.  I supplied the table instead.