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used all 56 inputs on ipac4, now how do i get 3 admn buttons to work?

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AtomSmasher:


--- Quote from: MajorLag on March 14, 2006, 08:18:09 pm ---I'm curious. What prompted you to believe that you needed 8 buttons each for players 3&4? I can't think of any 4player game that uses more than 4 buttons each...

--- End quote ---
He said it was for console games, several consoles use 8 buttons on all 4 players.

Thargok:

Shift is the easiest way, just crimp 1+2 player start together so ground triggers both.  That will give you escape.  1 player start + 1 player down is pause. 1 player start + 1 player right is tab.  1pStart+1pLeft is enter. etc.

http://www.ultimarc.com/ipac2.html

If it does seem to work, make the line going to 1 player longer than any others, and hold the button until you get the key press.

Of course you could buy an additional encoder.

pointdablame:


--- Quote from: ahofle on March 14, 2006, 07:23:38 pm ---Not that I think it's a great solution, but it would technically work.  Your characters in Gauntlet do not appear just by inserting coins.  You also have to subsequently press the start/magic button after inserting the credits.  Not sure about Xmen, but I suspect it would behave similarly.

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Nope, Xmen, TMNT, and a bunch of other 4p games pop a character on screen once you drop a coin in.  The coin slots correspond to certain characters, and coining up puts the player on the screen. 

You could choose characters in those games by using the 2p versions, but that's silly if you have a 4p control panel.

The point: DO NOT MAKE ONE CREDIT BUTTON INSERTS COINS FOR ALL PLAYERS.

muffin man:

i think i im gonna route 3 wires from 1p select and 3 shift keys for my 3 key buttons. i hope nothing goes wrong. Has anyone done this?

Tiger-Heli:


--- Quote from: muffin man on March 14, 2006, 07:00:33 pm ---would this work if i solder the three buttons to p, pause, and esc on the keyboard? lol

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Yes - But you really want to disassemble the keyboard, trace the inputs back and then solder the buttons to the input's on the keyboard PCB.

I have an overly detailed write-up on it at http://www.mameworld.net/emuadvice/keyhack2.html and Spystyle has a much simpler write-up here: http://spystyle.arcadecontrols.com/index79.htm



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