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#1 Opry99er ONLINE  

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Posted Fri Apr 14, 2017 1:26 PM

Can someone link me to pinouts on how to set up a Genesis controller as a direct plug-in joystick replacement for the TI?

I do not want to use an adapter.


Thanks!

#2 Shift838 OFFLINE  

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Posted Fri Apr 14, 2017 1:47 PM

Can someone link me to pinouts on how to set up a Genesis controller as a direct plug-in joystick replacement for the TI?

I do not want to use an adapter.


Thanks!

 

I would be limited of course since the TI only uses one fire button.

 

The pinouts for the Sega Genesis controller are

 

HERE

 

You can map the pins on the 99/4A joystick from

 

HERE

 

Should be able to wire the pins up by matching the correct ones on each side.



#3 abbeyj OFFLINE  

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Posted Fri Apr 14, 2017 2:02 PM

I think if you try to do this on an unmodified Genesis controller you'll run into the problem that only Up and Down will work.  The rest of the switches go through the mux chip in the controller and that won't work without 5v power on pin 5.  You can modify the controller to bypass the chip and connect the switches directly instead.  http://smalltimer.ne...d/segactrl.htmlhas instructions for doing this to produce an Atari-style pinout.  You could follow those instructions and then try switching the pinout on the cable around to match the TI-99.



#4 jedimatt42 ONLINE  

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Posted Fri Apr 14, 2017 4:30 PM

You could run all the extra switches to player 2's common...

directions, player 1 common and direction.
button A - player 1 common, & fire.
button B - player 2 common & fire.
button C - player 2 common & up
start - player 2 common & right

Now you can read all those buttons with TI BASIC if you like, without conflict.

-M@

#5 Opry99er ONLINE  

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Posted Fri Apr 14, 2017 5:40 PM

Thanks for the links, guys. :)

The one specifically for the Genesis to TI conversion was one I found on a quick Google search prior to posting this thread.

It lays out the way to turn the Genesis into an Atari-style controller. It is great, and I only need the one button.

Thing is, I was hoping to go straight in with no Atari adapter. I will study more to determine whether this is possible.


Again, thank you for your help!!!

#6 Airshack OFFLINE  

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Posted Sun Apr 16, 2017 9:38 PM

Best console controller out there IMHO.



#7 Airshack OFFLINE  

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Posted Wed Apr 19, 2017 9:41 AM

The Genesis controller is already an Atari-style controller with zero conversion needed. Sega was smart enough to make them plug-in compatible.

Since the open market has so many Genesis variations (Atari options, Standard Genesis, Sports Trackball, Arcade Multi) and they all work with a cheap $10 Genesis-to-TI converter dongle, why mess with the pin outs?

Why not just get the TI-to-Atari pin out dongle and give yourself tons of options?


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#8 Airshack OFFLINE  

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Posted Wed Apr 19, 2017 9:42 AM

The Genesis controller is already an Atari-style controller with zero conversion needed. Sega was smart enough to make them plug-in compatible.

Since the open market has so many Genesis variations (Atari options, Standard Genesis, Sports Trackball, Arcade Multi) and they all work with a cheap $10 TI-to-Atari converter dongle, why mess with the pin outs?

Why not just get the TI-to-Atari pin out dongle and give yourself tons of options?


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#9 Opry99er ONLINE  

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Posted Wed Apr 19, 2017 11:05 AM

Hmm.. I DO have the adapter, but neither of my Genesis controllers work properly.

#10 Ksarul OFFLINE  

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Posted Fri Apr 21, 2017 5:31 AM

I wonder if they just need the +5V power that is normally on an Atari joystick port? That's why an Atari Trackball doesn't work on a TI either--give it power on that pin from an external source and see what happens. . .



#11 arcadeshopper OFFLINE  

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Posted Fri Apr 21, 2017 7:45 PM

I wonder if they just need the +5V power that is normally on an Atari joystick port? That's why an Atari Trackball doesn't work on a TI either--give it power on that pin from an external source and see what happens. . .

 

i can test this for you.. i have some controllers will have to dig them out 

 

Greg



#12 jedimatt42 ONLINE  

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Posted Sat Apr 22, 2017 12:40 PM

Genesis controllers have a parallel to serial shift register chip inside that bring all the buttons encoded back as a serial signal, except the dpad.

For my TI and Tomy Tutor, I remove the chip and just use the switches.

The chip is surface mount so I do things like take a dremel and grind all the traces I don't want.

For best results on a 4A, use the controller's screwdriver interface.

Or, use a little PIC chip to talk to the sega device and pretend to be the TI device.

-M@




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