Coin Mechanism

[jwarburton]

Hi everyone,

Just finished my cab.  I have a coing mechanism that works fine with a Jamma game board in the machine.  I've also got a MAME pc in there which us using a J-Pac and arcadeVGA.  When i switch over to the PC i cant get the coin mechanism to work.  The mechanism has a number of wires coming out of it.  Has two grounds, one power, another power for the coin return light and two other wires.  One marked credit and one marked meter.

If i measure between the ground and the credit wire i get 4.8 v.  If i short the ground and the credit wire it returns a key press of 5 which is exactly the key I want it to return.  Inserting coins or pressing the free credit button on the board however dont return a 5.  They dont appear to do anything.  I must be missing some link, or a lack of understanding of how these things work.  Anyone got any ideas please.

many thanks

Jon

[SirPeale]

Bad switches, perhaps.  Or wired backwards.

[jwarburton]

but it works fine with an original jamma board?

[jwarburton]

btw the wires that im talking about are coming out of a control board.   Its not wired directly to a swithch.  I think the control board sends pulses to tell the game how much money has been put in.  The control board has jumpers on it to validate coins and determine how many credits u get.  How do I convert this to work with MAME?

[jwarburton]

Its a Mars Electronics MS115 if that helps anyone

[jwarburton]

I think I have found an answer on this webpage.

http://web.ukonline.co.uk/graham.c4/controls.htm

talks about making an interface to get it to work.  Anyone else got an experiance of this?