Naomi to RGB Scart

Beaps

Kabuki Klasher
Hi All,

I am trying to connect my Naomi system to my BVM via RGB Scart. I have flicked the jumper to set it to 15khz but I getting like a vibrating interlaced image.

Here is how I got it setup



When I go into test mode I get this



Is there another dip switch I need to switch. Currently I have 1UP the other 3DOWN.

Any help would be appreciated
 

Beharius

Rugal's Thug
I also noticed that you are connecting both sync signals(H&V) to the pin20, it's incorrect. You can use the composite sync line on the jamma connector instead or Kenzei (beharbros.com) to combine those separate sync signals into one Csync compatible with the Scart.

Naomi (VGA) - Kenzei - Scart (still need the resistors though)

Naomi (through Sega I/O jamma) - Scart with resistors
 
Last edited:

skate323k137

Giga Shock!!
I use a capcom IO, run the video from the dsub to that, then jamma to scart with 220 ohm resistors. Works perfect, and there's a switch inside the capcom I/O that handles the sync.
 

Beaps

Kabuki Klasher
I think I got it sussed. I am using a regular ATX power supply and I don't think it's powerful enough
 

Beharius

Rugal's Thug
Yes. Your issue is a sync problem, you either need to wire it from the jamma connector with resistors or use a sync combiner (like Kenzei) + resistors in the scart cable
 

Atro

Who?,
the resistor value used on the sync line may be higher than 220 ohms if you're sending +12V instead of +5V.
 

kuze

Giga Shock!!
It's only 200w, is that powerful enough

I run a 175w atx PSU and haven't had any issues powering supergun, capcom io, Naomi, netdimm and raspberry pi off of it. Older PSUs from the era seem to work best.
 
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