is "Insert Coin 2" necessary?

[currygoat11]

In designing my system, I have not accounted for "Insert Coin 2". I possibly made a wrong assumption that it wasn't needed. I could utilize a shift function of the I-PAC to get it to work if I really need to..... but I dunno if I need it (?)

I appreciate your comments on this subject, thanks!

currygoat

[DaemonCollector]

There are some games that will require the second coin button to insert coins for player 2...but there are ways areound it, you could change the control file so they are the same button...or wire the single button to both inputs...but with those you always add both coins.

[Jakobud]

Yeah you might need it for some 2 player games.  For example, in TMNT, it's a 4 player game.  But I'm pretty sure you can't insert coins only in the first slot and give credits to each player.  Each player has his own coin slots dedicated to them.  They have to insert coins in their own slots to give themselves credits.

An alternative idea is that you could have one master coin button, and in Mame, assign that button to all the coin buttons, so everytime you press it, it gives credits to everyone.

[currygoat11]

Thanks for the info!

[gap]

Yeah, as others have said, you can use shift.  But that will confuse guests.

As mentioned above, I just wired a single "credit" button to both the Player 1 Coin and Player 2 Coin inputs.

[currygoat11]

<<As mentioned above, I just wired a single "credit" button to both the Player 1 Coin and Player 2 Coin inputs.>>

so MAME is capable of processing these exactly timed inputs separately, and actually register coin1 and coin2? Sounds like it considering it's most likely buffered keyboard input.  Hmm I'm going to consider doing this myself - thanks..

[versapak]

so MAME is capable of processing these exactly timed inputs separately, and actually register coin1 and coin2? Sounds like it considering it's most likely buffered keyboard input.  Hmm I'm going to consider doing this myself - thanks..

Set up that way you will always be inserting a credit for BOTH player 1 & 2. Not a problem in most games, but in some games it will automatically put 2nd player in there, and you will be forced to kill them off, which really degrades the play experience. I highly suggest going with a shift function for 2nd player credit.

[currygoat11]

Hi versapak:

That will occur in some games, even if the "Player 2" button isn't pressed ?!?  Or are you implying the game will FORCE you to press Player 2 to proceed (?)

if so that's a good point, thank you for pointing that out..

currygoat

[Darkstalker]

Hi versapak:

That will occur in some games, even if the "Player 2" button isn't pressed ?!?  Or are you implying the game will FORCE you to press Player 2 to proceed (?)

if so that's a good point, thank you for pointing that out..

currygoat

I've never seen a game automatically start P2 just by inserting a coin, you always have to hit the P2 start button to jump in.  Just make sure that none of your other inputs get encoded to the same button as P2 start though, or you'll keep accidentally starting P2.

You will need a P2 insert coin depending on what games you are playing.  All of the SNK multi-cart cabinets didn't allow a universal credit pool, if you put coins in on P2 you had to play on that side.

As mentioned above, I just wired a single "credit" button to both the Player 1 Coin and Player 2 Coin inputs.

I think the easiest way to get both P1 and P2 to work off of one button is to map two keypresses to the one encoder input.  Saves an input if you want to do it that way.

[rchadd]

The Simpsons also needs seperate coins slots for each player

shift functionality of ipac should be possible to meet your requirement

you can generate P1Coin with ipac by pressing Start1 + P1Sw1

However Start1 + P2Sw1 doesnt seem to give P2Coin in default setup of ipac - should be possible to program it though.