ti99 joystick adapter box...NOT as easy as it seems.

[Kamino]

i've been working at the ti99 joystick adapter box found here
http://www.mainbyte.com/ti99/hardware/cables/joystick.html
for a while now.
Notes:
Pin four off the TI, not six, appears to be fire.
I did this project first with hacked up genesis extenders. It failed twice; first time i had directions but no fire. second time, i had fire but no up.
The third time, i bought a project box, a crimper, cable ends, the works at radio shack, good bye $12+ too much time.
Anyone actually DONE this project? I'm getting just a LITTLE impatient with this damn circuit...

[Kamino]

argh. itworks now. what the crap? the box is still a no-go. but the genesis crap works. weird.........

[john_soper]

Two thoughts off the top of my head. One is that the up direction does not work if the caps lock key is down (you might already know this, I found out the hard way two nights ago). The other is that the mod is for 2600 joysticks, genesis and sms controllers need 5v which isn't available.

[john_soper]

I looked at that diagram some more and remembered this issue coming up before. It has a mistake, a 2600 stick doesn't even use pin 5, that's a paddle line. Switch the pin 5 connections to the pin 8s which are 2600 joystick ground and see if that works.
John

[Kamino]

well the limey thing broke again, so i'll most likely rebuild it. I THOUGHT of using pin eight, quite a while ago....when it didnt add up...was not quite sure. I hope i did not wreck it with a bad ground.
Also: Props to you, john. Your coleco video mod rocks :)

[Kamino]

figured i'd update as I have reason to.
I changed the ground wires.
Then it still didn't work...
And then I realsed ALPHA LOCK WAS ON. :angry:
I'll see if this thing still works in a week......meanwhile, onward i go to attempt a 7800 s video mod.

[john_soper]

Heh-heh, gotta love that Alphalock key. For the s-video mod get sync and one luma working first before moving on. Makes things much easier.