Sega I/O Type 1 Digital Inputs won't activate

OldFoo · Post by **OldFoo** » Fri Apr 22, 2011 3:46 pm

Hi,

I bought a new I/O from a fellow user of the forum, and while the analogue inputs seem to work fine, I can't get the board to say a digital button was pressed. I'm not using any cabinet, just the pinout's from Andy's website.

I've tried wiring P1's start to ground and 5v but nothing makes the input change.

Any help much appreciated.

Thanks,

Naoki

OldFoo · Post by **OldFoo** » Fri Apr 22, 2011 10:04 pm

Do you have the looms plugged in to the board or are you trying by fiddling in the socket?

OldFoo · Post by **OldFoo** » Fri Apr 22, 2011 10:07 pm

No looms, just a megadrive pad hooked up to the right pins. I'm using the JST-RA plug and pins, and I'm not using the switch pin. This doesn't work with an atari joystick either, not even jumpering the pins.

OldFoo · Post by **OldFoo** » Sat Apr 23, 2011 8:55 am

You got the loop cable from pin 1 to pin 3 which is +5V, sometimes the JVS I/O will not do any DIGITAL inputs till that cable is there.

OldFoo · Post by **OldFoo** » Sat Apr 23, 2011 11:41 am

Thanks Andy, got the inputs to work

I guess #1 is a sense pin.

Anyway, while doing experimenting with that, my Naomi was glitching the graphics. It stopped after wiring the I/O right, but it did it even when the I/O board wasn't connected. It only did it on black+white stuff as colour wasn't affected much.

Like I said, it's stopped doing that but should I worry about this?

OldFoo · Post by **OldFoo** » Sat Apr 23, 2011 12:54 pm

NaokiS wrote:Thanks Andy, got the inputs to work I guess #1 is a sense pin.

Anyway, while doing experimenting with that, my Naomi was glitching the graphics. It stopped after wiring the I/O right, but it did it even when the I/O board wasn't connected. It only did it on black+white stuff as colour wasn't affected much.

Like I said, it's stopped doing that but should I worry about this?

Looks like one of the rams is on the way out..

OldFoo · Post by **OldFoo** » Sat Apr 23, 2011 9:19 pm

I tested the RAMs before hand, anyway, thanks,