Direct joystick connection

[bobricius]

Hi, My friend need build few arcade machines in to museum,
Because we do not need extra features, is posible to make build
with direct connected buttons to etc. Gpio 0,1,2,3,20,21,26,27
HDMI, PWM sound, no PSRAM, maybe for PICO2?

best with autorun file, etc menu on separed GPIO > etc GP22

I have no idea where to start,

Can somebody help? Megadrive / SNES looks like have best graphics from this old systems

[xrip]

I think you can do some DIY yourself. You can connect any Famiclone gamepad to it,
DPAD will work the same , select will be start, start will be A, a will be B, and b will be C.
Start+Select will trigger menu
Famiclone PINS are

NES_GPIO_CLK=14
NES_GPIO_DATA=16
NES_GPIO_LAT=15

Overal scheme of dev board are https://file.murmulator.ru/data/murmulator-types/mm1-3/img/sh-1-3.pdf
More useful info at https://murmulator.ru/

[bobricius]

Thanks for reply,
I wanted a simple device, I need to connect arcade joystick and arcade burtons. I bought 5 gamepads, one works, 2 don't work at all, Next 2 gamepads not read pressing 2 buttons at the same time, for example, when I hold the arrow, fire doesn't work.
That's why I thought it would be better if I connect the switches directly to the unused gpio because I certainly won't need PS2, gamepad or audio input.

I looked at the source code, but I'm a bad programmer, I don't know where to start, maybe It just need to edit the shift registry code.

[DnCraptor]

https://github.com/xrip/pico-megadrive/blob/main/src/main.cpp#L104 - good entry point to experiment. It is association from DPAD to related actions.