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Coin 1
battletoads:
OK! When I open the I/O screen in my Xmen PCB's test mode, it shows all the buttons on my CP and next to each one is a '0'. When i push a button, its corresponding '0' turns to a '1'. All the buttons on my CP work, except 'Coin 1' is ALWAYS at '1'. All 4 of my coin wires that come from the jamma cable and the jamma+ cables are running to buttons on my CP because my coin doors are screwed up.
I tried cutting the wire that runs from the 'Coin 1' plug in my big Jamma cable, and it still has a '1' value. Any ideas? Is there any other wire on the Jamma harness (maybe a parts wire, a key wire, lock, counter, or something) that could make my PCB think that Coin slot 1 is constantly activated? Or could it be my PCB? The connectors are all clean by the way, and the Jamma connector doesn't appear to be damaged anywhere.
Thenasty:
did you check the Coin Switch ? Maybe the wire is stuck. Maybe its connected wrong or its shorted. If you run the game, does the P1 gets credits ?
battletoads:
From the 'Coin 1' slot on my big Jamma harness runs a red wire. I spliced this with one of my own wires and ran that to a button on my CP. This system works for the other three players, but not player one.
No, player one never receives credits, which seems odd since according to the I/O screen the coin switch is ALWAYS activated. I don't see any visual imperfections in the wire at all. I have a TMNT Konami PCB coming in the mail in the next few days, so if I don't have the same problem with that board then I'll know its the X-men PCB.
How could I tell if it's shorted? If you read my past posts you'll see that the previous PCB in the machine was Battletoads, and that was wired for a common cin mechanism. No matter which slot I put a coin in, anybody could use a credit. I don't know how the previous owner managed this, and I don't understand how something besides the Coin 1 wire is making the game think the slot is in use.
battletoads:
Thenasty, anybody else, you don't know how I could fix this?
NoOne=NBA=:
Did you actually CUT the wire to the Coin 1 pin, or just disconnect it from the button?
From the sounds of it, you say you spliced into the wire, which would leave the existing coin mech in parallel with the coin button.
I would try cutting the wire that leads to the coin mechanism, and see if that cures it.
If it works properly with just the button as Coin 1, your problem is with the actual mechanism itself.
If you want to check the mech, it's not really complicated.
Just make sure that you hear the switch at the bottom of the mech clicking when the wire that actuates it is hit (as if by a coin).
As far as the settings that were done on Battletoads, if the 4 coin mechs are physically wired individually to the JAMMA harness, the "single coin slot" setting was probably a dipswitch thing.
Most of the "four" player games had dipswitch settings that would allow them to be used as a conversion in 2 player cabs (with only two players available obviously).
Because the game designers didn't know the exact layout of the conversion cab, they also usually included settings for "one coin mech only", "two coin mechs that take the same coin", "two coin mechs that take different coins", etc...
Another benefit of this was that the ops could quickly bypass a non-working coin mech using the dipswitches, and get the game back online.
That allowed them to actually FIX the game after hours, when they wouldn't be losing money doing it.