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No up direction in port 1...

1 reply to this topic

#1 Mauro72 OFFLINE  


    Space Invader

  • 17 posts

Posted Fri Mar 23, 2018 7:07 PM


I have this problem since blowup the first 74LS541N, the controller of port 1 and replaced with socket + new 74LS541N.

No way to move up, the remain actions, fire, left, right, down are working. The Port 2 is Ok, all directions, fire, etc.

Tested with 4 coleco original joyticks, all with this issue, no up movement.

What pin control the up movement? May be a faulty track? Which? Any help?


#2 cdn2a OFFLINE  


    Star Raider

  • 72 posts

Posted Thu Apr 5, 2018 3:24 PM

Up is Brown, pin1 to gray. So pin 9 on the 74ls541 I believe.

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