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Joystick plug pinout.
Posted: 15 Nov 2018 12:43
by Crazyboss
Hi.
Any descriptions on the Joystick pinouts. I know they are standard Atari like, C64 etc.
But does it have 5v+ too ?
Some joysticks have Autofire, which use the 5v+ line.
Re: Joystick plug pinout.
Posted: 15 Nov 2018 12:53
by Dave
Re: Joystick plug pinout.
Posted: 15 Nov 2018 13:15
by 1024MAK
It should also be mentioned that on the joystick ports, pin 8 is NOT ground (GND), but is a common for that port ONLY.
Autofire joysticks as well as needing +5V on pin 7, also need a real 0V/GND on pin 8.
Pin 8 on the joystick port of an MTX is either an input port pin (plug J4) or an output port pin (plug J5). This makes no difference if the only thing inside a joystick is ‘voltage free’ switch contacts.
But joysticks with autofire have an electronic astable multivibrator circuit (two transistors or a 555 timer chip or similar circuit). All of which expect a real 0V/GND on pin 8.
Mark