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Trackball (via MiniPAC) - Y axis reversed??

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stuzza:
I've just connected my Happs 3" Highball trackball to my minipac and for some reason the Y axis seems to be reversed - ie.  you push up and the mouse cursor goes down, push down and the cursor goes up?  This happens in both Windows and MAME.

I have made sure the trackball is mounted correctly in the panel, with the writing which says "monitor ->" definitely pointing up to the monitor.  The X-axis is fine, but the up down on the Y is reversed?  The cables coming from the minipac can only be connected one way also, so I don't think that is the problem?

Anyone have any ideas?

wakerlet:
stuzza,

I remember seeing a couple of posts regarding this.  I think Kelsy (Oscar Controls) may have the answer for you but here are the two things I remember reading:

1.  The Atari and the Happ molex connector have the y1 and y2 wires in opposite positions.  That is, the y2 wire on the Atari TB connector is in the same position as the y1 connector on the Happ TB.  This could be the problem (with the MiniPac or the TB)

2.  You can use jeweler's tools to swap the pins on the connector so they are matching up correctly (saw this post in the last week or so)

Good luck and post your resolution for the other BYOAC members when you have one.

-Todd

drunkatuw:
I was using a happ's golden tee trackball with my mini-pac and I did have to switch the two center wires on the y-axis to correct the problem.  

But even after the problem was fixed, I still had the problem with the cursor going backwards when I hit the trackball really hard.  I spent the $25 to get oscar's mouse hack and happ's trackball harness and couldn't be happier now!

stuzza:
Thanks for the info.  I'll try switching those two wires and see how it goes.  

I would have thought that if the minipac was designed for a happs trackball it would be round the right way to begin with?? Weird.

drunkatuw:
I emailed andy and he seemed to think it was just a mix up...but it's simple enough to fix.

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