I-Pac problem with MAME

[Pete Rittwage]

Hi guys,

I've had an old I-Pac for years (whenever they first came out) but lost my cabinet to flooding many years ago.

Anyway, I rebuilt it into a new cab recently and am reminded of a problem I always had with it.   When playing two-player games (Mortal Kombat II, for example) there is some combination of buttons that the Player 2 controls does that causes MAME to quit like you pressed the escape sequence (normally hold P1 and press P2).   I have two IPacs (mine and a friends) and I swapped them, but the same problem persists. 

They are setup to the default config, and I guess I need to sit down and see if I can find the exact combination, but I can play P1 controls against the PC all day, it's only some combination of the P2 controls.

Anyone else ever have this problem?  I have all keys mapped as the defaults and no shorts in the wiring.  This used to happen on my old cab with an entirely different control panel and PC.

Pete

[Jack Burton]

The exact same thing happens to me.  I'm using the default layout for the i-pac, with the newest version of Advancemame.  It seems to happen most during super street fighter 2 turbo.

[Hoopz]

You (both) need to reprogram the Shift function as it defaults to exit when pressing P1 and P2 start.

From the Ulimarc website:

SHIFT MODE

Pressing and holding 1player start enables shift mode with access to the following keys (when "MAME" setting is used):

2 player start=Esc – for jumping back to the menu

Joystick left=Enter – for running games in Windows and for MAME game config menu

Joystick right=Tab – for entering MAME config menu

Joystick up=~ - for entering MAME volume/gamma menu

Joystick down=P MAME pause key

1 fire (button 1)=5 – for simulating coin insert.

[Pete Rittwage]

When this happens, nobody is pressing the P1 or P2 start buttons.  Using regular joystick + 6 buttons on P2 causes the issue to appear. 

I'll get on the machine tonight and see if I can make it happen reliably.  It's also possible that it's a combination of P1 and P2 controls causing it, but we're definately not pressing the P1 or P2 buttons when it happens.

[Paul Olson]

If I remember right, it is a problem with using ctrl and alt in the default config. Try remapping to something else and the problem should go away.

[Pete Rittwage]

Actually, this turns out to be a MAME problem, not iPac or the config.

For sure, if you play MK2r14, and press any button you map as P2 button 6 in MAME, it crashes.  Other revisions of MK2 don't do that, nor does MK1 and MK3. 

Weird- I'll post it on the MAME bug list.

[Hoopz]

When this happens, nobody is pressing the P1 or P2 start buttons.  Using regular joystick + 6 buttons on P2 causes the issue to appear. 

I'll get on the machine tonight and see if I can make it happen reliably.  It's also possible that it's a combination of P1 and P2 controls causing it, but we're definately not pressing the P1 or P2 buttons when it happens.

Sorry, I read your initial post and misunderstood it. 

What version of Mame are you running? 

[Jack Burton]

Yes, I will also add that this happens to me while no one is pushing P1 or P2 start.

Also it happens in Super Street Fighter, so the sixth button thing can't be the cause either.

As for Ctrl and alt being mapped, I will remap my buttons with the I-pac configuration tool and see if that solves the problem.