TNK III in an Ikari Warriors cabinet

MaximRecoil

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Here is the pinout for Ikari Warriors (44-pin SNK):

Code:
IKARI WARRIORS
¯¯¯¯¯¯¯¯¯¯¯¯¯¯
SOLDER SIDE       COMPONENT SIDE
¯¯¯¯¯¯¯¯¯¯¯       ¯¯¯¯¯¯¯¯¯¯¯¯¯¯ 
1   +5V           2   +5V
3   COIN 1        4   COIN 2
5   SERVICE       6   RESET
7   START (1P)    8   START (2P)
9   UP (1P)       10  DOWN (1P)
11  LEFT (1P)     12  RIGHT (1P)
13  M. GUN (1P)   14  GRENADE (1P)
15                16
17  UP (2P)       18  DOWN (2P)
19  LEFT (2P)     20  RIGHT (2P)
21  M. GUN (2P)   22  GRENADE (2P)
23                24
25                26  
27                28
29  -5V           30  -5V
31                32
33  SYNC          34  BLUE
35  GREEN         36  RED
37  SPEAKER +     38  SPEAKER -
39  +12v          40  +12V
41  GND           42  GND
43  GND           44  GND

Here is the pinout for TNK III (also 44-pin SNK):

Code:
TNK III
¯¯¯¯¯¯¯
SOLDER SIDE       COMPONENT SIDE
¯¯¯¯¯¯¯¯¯¯¯       ¯¯¯¯¯¯¯¯¯¯¯¯¯¯ 
1   +5V           2   +5V
3   COIN          4
5                 6
7   START (1P)    8   START (2P)
9   UP            10  DOWN
11  LEFT          12  RIGHT
13                14
15                16
17                18
19                20
21                22
23                24
25  CANNON        26  MACHINE GUN
27                28
29                30  -5V
31                32
33  SYNC          34  BLUE
35  GREEN         36  RED
37  SPEAKER +     38  SPEAKER -
39                40  +12V
41  GND           42  GND
43  GND           44  GND

So the TNK III board works fine in the Ikari Warriors cabinet, i.e., the joystick controls the tank movement correctly, and the rotary handle controls the aiming of the turret correctly. +5V, ground, RGBS, P1 & P2 start, coin, and speakers are all in the right place as well. However, the two fire buttons don't work for obvious reasons. I have a few questions:

1. If I wire up the Ikari Warrior's card edge connector pins 25 & 26 to the fire buttons (in parallel with their normal wiring to pins 13 & 14) for use with the TNK III boardset, will that cause any problems when the Ikari Warriors boardset is installed? In other words, pins 25 & 26 aren't used on the Ikari Warriors boardset, but with this proposed setup, pressing e.g., the machine gun button when playing Ikari Warriors would close a switch on not only pin 13, but on pin 26 as well. Is this a problem? If it is, I could put a Molex connector in there to easily disconnect the TNK III fire buttons wires when using Ikari Warriors.

2. There is currently +12V on pins 39 & 40. TNK III only calls for +12V on pin 40. Is that a problem?

3. There is currently -5V on pins 29 & 30. TNK III only calls for -5V on pin 30. Is that a problem?
 
Last edited:
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