I need NBA Jam/JAMMA tech info

[Distortion]

Through an ebay auction, I've acquired an NBA Jam PCB set in a Nintendo cabinet (don't ask, i'm not sure why they decided on this combination, but it was a pretty good deal)  I'm looking for any online technical information that'll help me hook it up that I can find online.  I know you can buy the manuals on ebay, but an online source would be cheaper and easier for me.  I've already found several pages on DIP switches, but need to know anything about the wiring between the logic and sound boards and any other wiring info (particularly power wiring, as I saw nowhere for power to be plugged into the PCB)  Anybody know where I'd find that?

[Birdtales]

NBA Jam is a JAMMA + board so it gets it's power via the JAMMA conector

     ( JAMMA 56P STANDARD )
         ( REV: 1.0 )

     PARTS          SOLDER
------ ---- ----- |---------------
             GND  1|1 GND
             GND  2|2 GND
              +5V  3|3 +5V
            +  5V  4|4 +5V
               -5V  5|5 -5V
            +12V  6|6 +12V
               KEY  7|7 KEY
   COUNTER 1  8|8 COUNTER 2
C LOCKOUT 1  9|9  C LOCKOUT 2
      SPEAKER 10|10 SPEAKER
                     11|11
              RED 12|12 GREEN
            BLUE 13|13 SYNC
              GRD 14|14 SERVICE SW
       TEST SW 15|15 SLAM SW
          COIN 1 16|16 COIN 2
       1P START 17|17 2P START
            1P UP 18|18 2P UP
      1P DOWN 19|19 2P DOWN
         1P LEFT 20|20 2P LEFT
       1P RIGHT 21|21 2P RIGHT
       1P FIRE 1 22|22 2P FIRE 1
       1P FIRE 2 23|23 2P FIRE 2
       1P FIRE 3 24|24 2P FIRE 3
                       25|25
                       26|26
               GND 27|27 GND
               GND 28|28 GND

In this case the + is players 3 and 4. There will be an extra harness to those joys/buttons in addition to the regular JAMMA harness. Hope this helps.

[OSCAR]

Here's some info on the jamma and board-to-board connections.

If the below comes out too jumbled, I have it in a text file here.



                  NBA JAM

PARTS SIDE                         CKT SIDE
------------                       ------------        

  1   GND                           A  GND
  2   GND                           B  GND
  3   +5V                           C  +5V
  4   +5V                           D  +5V
  5                                 E
  6   +12V                          F  +12V
  7   KEY                           H  KEY
  8   CTR 1                         J  CTR 2
  9                                 K
 10   SP +                          L  SP-
 11                                 M
 12   VID RED                       N  VID GN
 13   VID BL                        P  SYNC
 14   VID GND                       R  SVC
 15   TEST                          S
 16   COIN 1                        T  COIN 2
 17   1 START                       U  2 START
 18   PL 1 UP                       V  PL 2 UP
 19   PL 1 DOWN                     W  PL 2 DOWN
 20   PL 1 LEFT                     X  PL 2 LEFT
 21   PL 1 RIGHT                    Y  PL 2 RIGHT
 22   PL 1 SHOOT/BLOCK              Z  PL 2 SHOOT/BLOCK
 23   PL 1 PASS/STEAL               a  PL 2 PASS/STEAL
 24   PL 1 TURBO                    b  PL 2 TURBO
 25                                 c
 26                                 d
 27 GND                             e  GND  
 28 GND                             f  GND  



  P3 TO SND BD P6     SND P7             SND P5
  ---------------     -------            ------
  1   SP+             1                  1    
  2   SP-             4                  2  POT
  3   +12V     5                         3  KEY
  4   +12V     6                         4  POT
  5   KEY      4
  6
  7   GND      3
  8   +5V      1
  9   GND      2



  P5,6 (PL3,4)
  ----
  1  GND
  2  ----
  3  ----
  4  ----
  5  ----
  6  START
  7  UP
  8  DN
  9  LT
 10  RT
 11  SHOOT/BLOCK
 12  PASS/STEAL
 13  TURBO
 14  ----
 15  ----



 DIP SW 1   1    2    3    4    5    6    7    8
               
            OFF                                       COIN IN DIP SW
            ON                                        COIN IN CMOS
                                                      COIN/CREDIT
                 OFF  OFF  OFF                        2/1     2 CONTINUE
                 ON   OFF  OFF                        2/1     1
                 OFF  ON   OFF                        1       1
                 ON   ON   OFF                        2/1 OR 4/3
                                OFF  OFF              USA
                                ON   OFF              GERMANY
                                OFF  ON               FRANCE
                                ON   ON               NONE
                                          X    X      COIN CTR MODE

 DIP SW 2   1    2    3    4    5     6   7    8
            OFF                                       2 PLAYER
            ON                                        4
                 OFF                                  NO BILL ACCEPTOR
                 ON
                      OFF                             SHOW VID CLIPS AT HALF
                      ON                              DON'T SHOW
                                         ON           POWER UP TEST
                                              ON      TEST

[Distortion]

You'll have to excuse my lack of knowledge about JAMMA, but really the main reason I got this cab was to learn about JAMMA, (plus i'm a pretty big NBA Jam fan) so it all works out as long as there's someone on the other end willing to be patient.  I have a yellow and black cable coming from the power source that currently is connected to nothing.  Since I have no desire to fry out my boards, I'll ask you guys first....

Where does this plug into the JAMMA harness...or does it at all?  From where does my board get power?  From what I know about computers, yellow would be +12v, right?  I had built up in my mind, however, that the +12v was an outgoing current, not incoming....So would the yellow one go on the +12v and the black on one of the ground wires? or would they both go on +12v?  Or am I way off?

[mj147]

Maybe I can help your NBA Jam board should look simmilar to this:


Now just connect ur jamma harness to the board, it can only go in one way so u cant screw it up
should look something like this:


Hope this helps, If ya need more pics of a jamma cab just ask


mj147

[BobA]

Just to simplify the explaination a bit.  If you look at the info that Oscar provided the power supply is connected to the JAMMA connector at points 1 to 6 and A to F.  These power wires are coded on a typical JAMMA harness but you cannot always depend on the color coding so verify the wires and pins.  

In the drawing provided by Birdtales these wires are 1-6 on each side designated component and circuit sides.  It is the JAMMA standard and shows -5V whereas Oscar does not.  The info provided by Oscar is specific for NBA jam.

So your question about the yellow and black wire makes sense.  The -5V is not required for NBA jam and has probably not been connected to the JAMMA harness.  You might need it for other boards however.  There are usually alot of black wires connected to the jamma connector and all are usually GND.

Sorry to be really long winded but was sort of figuring it out in my own mind as I answered.

BobA

[Distortion]

MJ, I've got no problem connecting the harness to the board, right now I'm just worried about the power supply, but thanks anyway.

BobA, thanks for the input, and I've got one more question, and if anyone can verify this info, I'd appreciate that as well.  What about +5v?  Do I need to have a +5 coming in, or does NBA Jam use it?  I know none of the controls are optical, so there is no need for it there, but would I need it for something else?  I didn't see any red wiring coming from the power supply.  I think it's actually the original Nintendo power supply, so it's likely to be quite old.  I'm considering swapping out the old one for a PC power supply and maybe just putting some fuses in the line to prevent anything from getting out of hand.

Oh, and what games would use -5v?  And if you're using optical controls, would it come into the jamma harness then out the board or harness, or straight from the power supply? (just for future reference)

[BobA]

All jamma boards use +5V.   Not sure what percentage use -5V but to make your jamma connector universal it should be connected.  

If it is a converted cab then you may not see red wiring for +5V but is is definately there for the nba jam.

BobA

[Distortion]

jeez, the more i look at this thing the more i realize how poorly it was converted....at the base of the power cables, the cables are actually all black, then they both connect (twist on of course  ) to yellow cables then one goes back to another black cable.  I'm gonna have to swap out the power supply and do some shink tubing stuff.  I can get PC power supplies cheap at work (best buy) so should I do that or try to figure out what the hell is going on with the old one?

What gauge of wiring should I use to connect the -5v since there's nothing there at the moment?  The old ones look like they're probably around 20 gauge.

[BobA]

The 20 guage should be fine. -5V has a very low current requirement.

You can use a PC power supply but care should be taken because some cannot be used without some load.   Newer supplies will also require a turn on signal.

A better alternative is a video arcade game type powersupply which you can get off eBay or an arcade supplier and is very easy to wire because of the screw terminals.

An example of this type of supply is shown below. I have gotten them for as little as $10.

BobA

[Distortion]

Thanks bob, I really appreciate your help and patience.  You'll probably be hearing back from me when I get to the stages of hooking this all up.  I'm still debating whether to go with the 19" monitor that it already has the mount for, or to go with a 25" mainly due to monetary issues.  If I go to the 25", I'll probably also expand the CP to accomodate 4 players.  Any suggestions there?

[BobA]

If you go 25 inch TV then the cab will not be jamma compatable.  To keep it compatible you should have an arcade monitor.  If you use a TV your jamma boards will require a RGB to NTSC converter such as the one produced by JROK,

BobA

[paigeoliver]

A Nintendo type power supply makes +24 for the coin counters. That may be why you have an unconnected plug coming from the power supply. Or it could also be because it is a bad conversion.

Sell that Nintendo power supply on ebay, and use the money to buy a normal one.

You are going to want -5 volts. Just enough games use it that it would be dumb not to have it. I remember wiring up my Time Pilot/Time Pilot '84 cocktail without -5 volts. I have '84 boards for a month before I had Time Pilot boards. Played perfectly without -5. Then my Time Pilot boards came, and they didn't work right without the -5.

[Distortion]

Thanks, but I'm pretty familiar with the concept of an arcade monitor.  That's what I was planning on doing anyway.  I'm gonna go see if I can clean up the old power supply and figure out what is coming from it.