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I know it's anal: multiple credits when pressing coin button

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(+_+):

I've wondered about this before as well. I have a Robotron machine at home and in the config you can set up multipliers (unless it was just a dream). Such as

2 quarters = 1 play
4 quarters = 1 play

1 quarter = 2 plays
1 quarter = 4 plays

I haven't looked at this in years and can't double check this since my Robotron is on the blink. But I'm pretty sure it worked like this and may be the reason why the port to Mame is causing this.

Anyways, as a kid I never would have even considered complaining about it. 1 quarter 4 plays.  :woot



SirPeale:

Link

Basically, with the Williams games, it supports three coin inputs.  Mame interpets slot 2 (usually inputted as '6') as the 'center' slot, not the right.  It's set by default to four credits per coin.  You can go in and flip the DIPs to change this.

Edit: I see it's already been explained.  Should have read the rest of the thread.

AMDman13:

How funny... I just noticed this a few nights ago myself!

MaximRecoil:

I have something similar happening on my Ikari Warriors machine (not MAME, actual hardware), and obviously the Williams dollar slot thing doesn't explain this one. Coin slot 1 gives 1 credit per coin like it should, while coin slot 2 gives 6 (!) credits per coin. I could fix it by wiring the slot 2 coin switch in parallel with the slot 1 coin switch, but I'm kind of curious what the problem is.

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