Sega-Naomi

Posted: **Tue Oct 17, 2006 9:47 pm**

hello in there,

i'm still looking for the mod...

anyone?

thanks

arnaud

Posted: **Thu Oct 19, 2006 9:04 am**

Which mod is this ?

Posted: **Thu Oct 19, 2006 12:12 pm**

There was a fault on some versions of the Sega Jamma I/O, which involved breaking a couple of traces on the PCB.

I for the life of me can not find the documentation on it.

Posted: **Thu Oct 19, 2006 12:17 pm**

http://seuservice.com/bulletins/BULL_120.pdf

http://seuservice.com/manuals/KITS/NaomiWD.pdf

You have to have a coin meter hooked up, and the it must use resistor (Craig like on the I/O boards on the Naomi, I think they have a 100ohm resistor)

Posted: **Thu Oct 19, 2006 11:12 pm**

well is there a way i can mod the IO for it to accept coins directly without the coin meter?

thanks

arnaud

Posted: **Fri Oct 20, 2006 10:20 am**

should i connect my coin acceptor output directly to the coin counter?

Posted: **Fri Oct 20, 2006 2:08 pm**

It's a good idea to look at the universal wiring diagram. I think there is a specific way to connect it since it uses a diode(+,-). I haven't needed to hook one up, so I'm not 100% sure (my cabs already have hookup).

If all else fails, try one way. If it doesn't work, try the other way. There's no harm in trying.

Sega-Naomi

sega IO rev 1 coin mod?

sega IO rev 1 coin mod?