Sega-Naomi

So today i fired up a Naomi 1 MOBO in my AWSD cab using a Capcom I/O, the game booted up fine up until the 'press start button' screen and then said I/O error and it wasn't picked up in the test menu.

Tried it again in another cab and this time it booted up to the same place, only this time it let me start a game for a bit before the screen went blank and the I/O error screen come up again.

Anybody got any clues as to the problem?

Reseat the USB connector on the NAOMI Mobo side. It's notoriously fickle.

Didn't think i had another USB cable to try, then i remembered my printer one will do, tried it and worked fine, tried the original cable and that worked fine too....i'm baffled...only change is the game yesterday it was Virtua tennis today CAPvsSNK :smt017

whats you're +5 like

Would i be checking that on the jamma edge?Tried the mobo today with the cabs JVS supply and then through the I/O power and it seemed fine :smt017

The Naomi 1 mobo doesn't need both jvs power plugs in it to work without the gd-rom does it?

While i'm on would it harm a naomi 1 mobo if both power plugs were put into it without the gd-rom setup or doesn't it matter?

not worked on the capcom i/o BUT i know this little unit draws some power due to the extra jobs it does

all my naomi have both power input plugged in and always have had

Best to use both JVS power plugs on the Naomi 1 mainboard in the Awave.



The Capcom I/O can easily flake out, normally the I/O IC burns out, you defintley need to check your +5V under load to make sure it isn't too high or too low.

ok cheers, how's the best way to check it? at the jamma harness/ edge?

thechop wrote:ok cheers, how's the best way to check it? at the jamma harness/ edge?

Yeah, and also check on one of the plugs that goes into the Naomi

Oh right , nice one cheers pal