Posted by Rocket2600 on 27, 2000 at 3:12 PM:
In Reply to: Hagstrom LP24 posted by Ken (aka FUAM) on 27, 2000 at 1:20 PM:
Hi. I am using a LP-24 also. If I got this right all the buttons are working just that a few on them are not the right key. So if you want a button to press "p" and your getting a "m", something like that? Daisy chaing your grounds are fine but not recommended. If ever you have a microswitch or a problem like your having it's going to be a major pain to find the button giving you the problem. So you have your buttons daisy chained. Double check and make sure your have all your "A" grounds together and all your "B" grounds together. If by chance you have one button hooked to the "B" side when it should be "A" then that's your problem. This to me is what it sounds like what happened. I would buy a terminal block to do all the "A's" and one for all the "B's". This will save you alot of headaches in the future. JP4 has a good picture of his LP-24 and wiring on his Arcade Paradise site.
http://www.enteract.com/~jpinner4/APFrame.htm
He also has info on how he did a 2 x 22 matrix. I looked at his site alot when doing my project and he was always friendly when answering e-mails. Good luck and Game On!
----------->Rocket2600
: Hi Guys-
: I bought a LP24 and I hooked it up with the help of the diagram from this site for the two 8-ways with 6 buttons each and all of the MAME default keys, but only some of the keys work and the ones that do work are not mapped correctly to the buttons. I did daisy chanin the grounds for the "A" row in serial and also the "B" row grounds. Is this the problem? Do I have to take one wire each for the common to a terminal strip and then one wire to the "A & B" row wires? Please let me know because I am going crazy tring looking at my controller and not being able to use it :-( Thanks