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 Post subject: VGA Mod for DC
PostPosted: Fri May 18, 2012 2:11 pm 
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DCEmu Newbie
DCEmu Newbie

Joined: Fri May 18, 2012 2:06 pm
Posts: 2
I recently added the VGA connection to my DC. Everything seems to work except the picture comes out Black & White! Any ideas? I've checked for continuity between all the pins and MOBO. Sound works and the picture shows up. I'm lost as to where to start troubleshooting this issue.

I followed this guide:
http://www.mmmonkey.co.uk/console/sega/dc-vga.htm


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 Post subject: Re: VGA Mod for DC
PostPosted: Fri May 18, 2012 2:44 pm 
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The Crabby Overlord
The Crabby Overlord
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Joined: Mon May 27, 2002 9:31 am
Posts: 4299
Moved to the Hardware forum.

The problem is most likely with the RGB pins (or at least that's the only sensible place for it to be). Did you wire the capacitors up properly between the Dreamcast and the VGA connector? I'm pretty sure they won't work right if you get the polarity reversed, being that you should be using electrolytic capacitors for them.

Note, I've never done this particular mod, so I'm basically just taking a stab in the dark here. :wink:


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 Post subject: Re: VGA Mod for DC
PostPosted: Sat May 19, 2012 9:16 am 
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DCEmu Newbie
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Joined: Fri May 18, 2012 2:06 pm
Posts: 2
I work with a few electrical engineers, had them go over the schematics and we matched them to the device. The only thing I can think about is what happens if you mix up the RGB pins?


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 Post subject: Re: VGA Mod for DC
PostPosted: Sat May 19, 2012 12:09 pm 
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The Crabby Overlord
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Joined: Mon May 27, 2002 9:31 am
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If you mixed up the RGB pins, you'd likely just get odd colors, not black-and-white.

As I said, I was basically just taking a stab in the dark. Sorry that I can't be of any other help. :?


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 Post subject: Re: VGA Mod for DC
PostPosted: Mon Sep 03, 2012 11:01 am 
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Mental DCEmu
Mental DCEmu
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Joined: Mon Apr 25, 2005 11:02 am
Posts: 328
Location: Three-rivers canada
Are you using a tv or a vga monitor?
I did this circuit once and it worked as it should on a pc monitor. If I remember well, in vga mode the signal is progressive.
I think the only time I had black and white was when I connected ntsc composite video on a pal tv (it's been almost 10 years)


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