Joystick

1
Joystick

• Anselmo Lastra

2
Atari 2600 Joystick (have 2-3)
http//www.atariarchives.org
3
We Have Sega Joypads

• Enhanced version with more buttons
• Has mux
• Select pin chooses first or second set of
  buttons, L/R

http//pinouts.ru/data/genesiscontroller_pinout.sh
tml
4
Six Button Use

• See
• http//www.cs.cmu.edu/chuck/infopg/segasix.txt
• Use select to use buttons B C
• To use X, Y, Z, need to pulse select

5
NEXYS Mappings (PMOD JA)
Signal FPGA Pin DB-9 10-Pin
Up M15 1 4
Down L17 2 3
Left L16 3 8
Right K12 4 2
Btn A/B M14 6 9
Start/C L15 9 1
Select M16 7 10
Ground - 8 5
Power - 5 6
PMOD JA is 10-pin connector nearest VGA connector
6
Suggestion

• Create FF for Select
• Memory map so you can set from CPU
• Memory map the input signals
• I would not latch them
• Please power off when plugging or unplugging Sega
  joypads!
• Careful when plugging in PCB

7
Links

• http//pinouts.ru/data/JoystickAtari2600_pinout.sh
  tml
• http//pinouts.ru/data/genesiscontroller_pinout.sh
  tml
• http//www.epanorama.net/documents/joystick/ataris
  tick.html
• http//www.epanorama.net/documents/joystick/tvgame
  s.html
• http//www.cs.cmu.edu/chuck/infopg/segasix.txt