JPac SHIFT Issue

[FrizzleFried]

Hello folks... long time no post.

I am having (and have been having) an issue with my MAME cab with JPAC where my SHIFT options stop working after a load up and a few games...

They will work after each load up,  so it's NOT a physical connection issue.... but sometime during gameplay the SHIFT stops working preventing me from SHIFT commanding me out of MAME (P1 + P2 START)... I have to lift the CP and escape manually.  P1 and P2 show up independently but I can not get P1 + P2 SHIFT option to work... unless I reboot and we're back to square one.

Any ideas?

[rpgposer]

Hey!  I intermittently have had the exact same issue.  Windows XP on your cab PC?  It seemed to happen with certain games like Ibara.  As part of troubleshooting I turned off sticky and repeat keys and their notifications and it seemed to vanish, but since I made the changes RL got busy and haven't had time to thoroughly test.  Hope this helps.

[gamer83]

Hey frizzle,what front end are you using?this has happened to me a few times as well using hyperspin,in my case tho its not the ipac thats causing issues,rather it was hyperlaunch buggin out on me.

[rpgposer]

I use MALA.
FYI

[pbj]

I've had this issue with every single JPAC I've ever owned.

I ended up rewiring Player 1 start to another input on the JPAC and using combinations of inputs in MAME to do the admin functions.  That solution always works.

 

[rpgposer]

Thanks Jim Jelly.  If it does this again after further testing, I'll take your advice.

[FrizzleFried]

I use MAMEWAH... I have an extra button that I currently use for PAUSE... but it's in a spot right north of the trackball and gets bumped from time to time.  I much prefer to use the P1 START + P2 START option if at all possible but this happens EVERY time I use the MAME cabinet if I play more than a game or two...

It's getting old...

[AndyWarne]

This would be caused by a switch becoming stuck closed. Usual suspects are the coin door switch or cabinet service switch, "door open" switch etc.

[rpgposer]

You heard the man... take those buttons apart and clean the petrified cola out of them.

[FrizzleFried]

This would be caused by a switch becoming stuck closed. Usual suspects are the coin door switch or cabinet service switch, "door open" switch etc.

This is what I was told before... however, a reboot fixes the issue for a while until it happens again... then a reboot fixes the issue again?   It seems to me that if it was a stuck button,  it would be consistent.  It would also seem to me that most stuck buttons can be seen when writing a text file... but none are showing up (but again, not a fool-proof test)...

I've double...triple...quadruple checked my buttons and they are all fine.  I don't have a coin door switch... no service switch... etc... plus,  like I said,  it works fine every reboot for a certain number of games/button pushes...  Am I wrong to assume that if it was a stuck button the issue would present itself immediately upon boot up?

EDIT: Can anyone suggest a program for checking all button inputs?

[AndyWarne]

A good test program is the keyboard test from www.passmark.com which has a 30 day trial.

If you can drop me an email I can suggest other checks and if necessary we can replace the board.

andy@ultimarc.com