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Main => Monitor/Video Forum => Topic started by: borzwazie on April 18, 2013, 05:06:46 pm

Title: newbie help with a WG CRT
Post by: borzwazie on April 18, 2013, 05:06:46 pm

Hi all - we're putting together a cabinet at work  ;D. We've got a Wells Gardner monitor, looks very similar to but not exactly the same as a 25k7401. I've made a VGA adapter cable, and I have a picture. The only problem is that the picture is doubled in the horizontal plane, i.e. I see two copies of every image offset by some amount of space.

I'm using Windows Vista with a Geforce 6200 and whatever the latest Forceware drivers are, within the last week or so. I'm guessing this has something to do with the horizontal sync rate, but I'm not sure. Could someone point me in the right direction?

Title: newbie help with a WG CRT
Post by: mgb on April 18, 2013, 05:12:07 pm

I'm assuming your putting VGA into a cga monitor.
 Are you using soft 15khz

Title: Re: newbie help with a WG CRT
Post by: borzwazie on April 18, 2013, 05:21:08 pm

I thought perhaps it was the problem solved by soft15, but when I try to install it, the "install" option isn't available, it's greyed out. So, I thought I'd ask first. The docs for the monitor (the docs I have) do indeed show a horizontal sync of 15KHz. The docs also indicate a mode of 640x200.

Title: Re: newbie help with a WG CRT
Post by: borzwazie on April 18, 2013, 08:25:36 pm

More reading later, and I find this:

http://www.arcadespareparts.com/arcade_parts/video_converter/vga_rgb_cga_video_converter/12215.html (http://www.arcadespareparts.com/arcade_parts/video_converter/vga_rgb_cga_video_converter/12215.html)

(http://www.arcadespareparts.com/products/images/vga_rgb_cga_video_converter/12215.jpg)

I think this is what I need, since I pretty clearly have a CGA monitor.

Title: newbie help with a WG CRT
Post by: mgb on April 18, 2013, 09:22:09 pm

Yeah that converter would work but soft 15 should do it.
But I've never used it so I can't be of much more help on that.

Title: Re: newbie help with a WG CRT
Post by: dandro on April 19, 2013, 09:37:17 am

what video card are you using? some cards are not compatible with soft15 and some that are, require a different version of the driver. My screen did the same exact thing with double images, until I uninstalled and reinstalled the driver, but I also use quickres in companion to soft15 in order to get the 640x480 screen on my 29" monitor.

Title: Re: newbie help with a WG CRT
Post by: borzwazie on April 19, 2013, 08:14:27 pm

I'm going to give it one more try with Linux and Groovy Mame - since you can manually set the modelines without having to worry about picky driver versions, I might have a better shot than Vista.