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Veteran Gamer. 1st-time MAME'r (Pole Position). Help me out pls.
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bkenobi:
Yes, that's a ball mouse.  The other types would be optical or laser, but those won't work for this project.
vintagegamer:
Thx just wanted to make sure we were all talkin the same balls LOL
vintagegamer:
This is the joystick I have lying around.  If it could be used for this project, then all the better!

http://www.amazon.com/Gravis-Eliminator-Joystick-USB-Mac/dp/B000052WLY

It has the cable with both the serial end on it, as well as a USB adapter.

I also checked the back of the machine and there is no serial interface to hook this up to.

Will the mouse hack work with pretty much any encoder wheel type as long as it fits between the emitter and the other thing?  I'm sure the numbers have to be adjusted in the MAME control panel for the analog settings but aside from that, is there anything else that would prevent the original encoder wheel from working with the PS2 mouse board?  I just have to make a bracket to hold the PS2 mouse board in place next to the encoder wheel.
Paul Olson:
If money is a huge issue, you can try to hack the mouse and joystick, but the U-HID Nano would be a far better solution. For $35, you get 8 inputs and all of them can set as Digital, Analog, or Optical. I don't think you can get much easier than that. If you need more inputs than that, you could go with the full size U-HID. MOst wheels work with the UHID; the only ones that I have found so far that do not are from a Badlands machine. http://www.u-hid.com/home/uhid_nano.php

You can see in the manual here: http://arcarc.xmission.com/PDF_Arcade_Manuals_and_Schematics/Monaco_GP_Stand_Model_(420-0445).pdf

that the steering wheel uses a set of gears, and the smaller one spins the shaft that the encoder wheel is on. You can see the optic board on the right.
BadMouth:

--- Quote from: vintagegamer on April 13, 2011, 09:19:28 pm ---Will the mouse hack work with pretty much any encoder wheel type as long as it fits between the emitter and the other thing?  I'm sure the numbers have to be adjusted in the MAME control panel for the analog settings but aside from that, is there anything else that would prevent the original encoder wheel from working with the PS2 mouse board?  I just have to make a bracket to hold the PS2 mouse board in place next to the encoder wheel.

--- End quote ---

I think you're misunderstanding the mouse hack.  You actually leave the original Monaco GP boards in place and run wires from them to where the sensors were removed from a hacked mouse.  Do a google search for "trackball mouse hack".
If you know the pinout of the original plug on the Manaco GP parts, you can actually just make a wiring harness and not alter the original parts.

Personally, I'd go with the Opti-Pac, Opti-Wiz, or Uhid Nano option.
I just have visions of myself screwing up enough mice to buy an interface anyway.

You can adjust the sensetivity in MAME to make up for a different tooth count.
If you want it to be perfect, you can calculate it:
http://wiki.arcadecontrols.com/wiki/Spinner_Turn_Count
But I'd just as well mess with it until it feels right on your setup.
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