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Hooking up Pole Position controls to a Mame Cabinet?

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Chris:

--- Quote from: ratabase1 on July 14, 2004, 06:15:39 am ---I emailed OscarControls last night and this is what they said.  "The original Atari optic boards will work with the USB interface.  The Atari board has the same pinout as the Happ board as shown here:
http://www.ultimarc.com/optipac4.html."  
I guess I will give it and see.  

--- End quote ---
I made this assumption once and for my Pole Position wheels it was not true.  However, it is possible that there are more than one flavor of Atari interface boards...

captainpotato:

--- Quote from: Minwah on July 16, 2004, 07:29:15 am ---
--- Quote from: Karman on July 15, 2004, 09:18:13 am ---There are lots of ways to do the steering wheel and pedals, but what I want to know is: How can you interface the shifter?!  It has a miscroswitch that is either on or off (hi or low in the game) but the mame code works off of a button press to switch between high and low.  Anyone have any ideas?

--- End quote ---

1) Same input toggles hi/lo (eg Pole Position)

[snip]

I'm not sure the best way to deal with 1), without some coding work in MAME.

--- End quote ---

Would it work with a shifter with a microswitch on either side of it, both linked to the same input? That way, when it is moved, it is just the same as hitting the same button to change from low to high gear (and vice versa).

Minwah:

--- Quote from: captainpotato on July 16, 2004, 11:08:21 am ---Would it work with a shifter with a microswitch on either side of it, both linked to the same input? That way, when it is moved, it is just the same as hitting the same button to change from low to high gear (and vice versa).

--- End quote ---

I think so, as long as there is a slight gap between releasing one switch and hitting the next, so it does not appear as one long keypress.

What would possibly be better is a microswitch that is only momentarily hit, when shifting either up or down.  I'm not sure if this could be added to a shifter easily or not...I will find out when I get to make my steering wheel panel!

captainpotato:

--- Quote from: Minwah on July 16, 2004, 11:53:16 am ---I think so, as long as there is a slight gap between releasing one switch and hitting the next, so it does not appear as one long keypress.

What would possibly be better is a microswitch that is only momentarily hit, when shifting either up or down.  I'm not sure if this could be added to a shifter easily or not...I will find out when I get to make my steering wheel panel!

--- End quote ---

What about using a spring to break the contact?

I haven't got Pole Position handy to test it, but perhaps if the button is held in, it doesn't change gears constantly, but requires distinct individual presses?

Minwah:

--- Quote from: captainpotato on July 16, 2004, 12:00:50 pm ---What about using a spring to break the contact?

I haven't got Pole Position handy to test it, but perhaps if the button is held in, it doesn't change gears constantly, but requires distinct individual presses?

--- End quote ---

That's right, I think MAME sees the shift hi/lo the instant the input is pressed down (closed)...so you have to release (open) and repress to change gear.

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