I got the JST connectors I've been waiting for today nd it got me thinking of controls gain. I'm a little confused how the Sga I/O Board type 1 works. After connecting it to a USB socket I noticed it did nothing, not even light up the LEDs. Fair enough, it has +12 and +5v in ports so I gathered it picks it's juice from them, not the USB connector. Looking at it and how I'll be using a PC power supply with it, I know that aslong as the volatge is right it should work fine yet I'm a little scared when I plug 5v and 12v into it the chip will blow up. Don't know why, but is this even possible?
Also, with Digital Inputs, I read somewhere that they work like a Mega Drive pad, so you send 5V into it when not active and GND when it is. I'm a littl skeptical over this, as it would make more sense for 5V when active. Anyway, I'm not really sure, and even with the Pinout I'm not entirely sur ehow to proceed. Just wire say P1 Start to a switch and the other end at the GND terminal?
And with the 26-pin analogue port (Despite not owning the 26-pin JST RA part), how would one connect a Pot up to it? I looked at the pinout but it confused me.
The only other thing is the JVS Power, which while not related to the I/O still troubles me. Looking at the Pinout from seganaomi.com, I thought I had the power roughyly sorted out. SegaNaomi and the Naomi manual both say: