Build Your Own Arcade Controls Forum

Main => Monitor/Video Forum => Topic started by: jspicher on June 06, 2011, 11:20:55 am

Title: vga converter board to use computer monitor in arcade cab
Post by: jspicher on June 06, 2011, 11:20:55 am

Hey guys,
I've got a couple monitors that have just about gone kaput on me, and it's about time to replace them.
While going over my options l've come across these video converter boards, which supposedly will allow me to use a vga LCD or standard CRT monitor in my cabs:
http://www.jammaboards.com/store/cga/ega/yuv-to-vga-converter-pcb-gbs-8220/prod_291.html (http://www.jammaboards.com/store/cga/ega/yuv-to-vga-converter-pcb-gbs-8220/prod_291.html)

Has anyone used these before, what do ya think?
From my reading it sounds like the hardest part about these is figuring out a way to mount your monitor into the cab... are there any other downfalls?

Title: Re: vga converter board to use computer monitor in arcade cab
Post by: lilshawn on June 06, 2011, 03:22:14 pm

some oddball frequencies won't work with this converter. if it's standard red 15k or medium res 25k or high res 31k it's fine.

Pre- "Golden Tee Complete" will not work for sure (due to odd refresh rate) I've tried and tried with no luck.

Title: Re: vga converter board to use computer monitor in arcade cab
Post by: jspicher on June 11, 2011, 02:28:44 pm

But this would work with old donkey kong, pac man type games yeah?
Does anyone have experience?

PS> lilshawn, so does that mean you have one laying around you're not using? Interested in selling?

Title: Re: vga converter board to use computer monitor in arcade cab
Post by: lilshawn on June 11, 2011, 02:37:51 pm

Quote from: jspicher on June 11, 2011, 02:28:44 pm

But this would work with old donkey kong, pac man type games yeah?

they might work, AFAIK they don't use odd ball resolution rates. so they SHOULD work. but theory and reality rarely coincide.

Quote from: jspicher on June 11, 2011, 02:28:44 pm

PS> lilshawn, so does that mean you have one laying around you're not using? Interested in selling?

sorry, the company actually owns it. It was bought as a "just in case" item to replace a blown up monitor.

keep an eye out on flea-bay, they can be had for sub $40

Title: Re: vga converter board to use computer monitor in arcade cab
Post by: lilshawn on June 15, 2011, 01:16:17 am

okay..oddball resolution for golden tee complete and prior for future generations:

resolution: 640x350
h-frequency: 25.7KHz
v-frequency: 60.6hz
pixel clock: 21.5khz

Title: Re: vga converter board to use computer monitor in arcade cab
Post by: StephenH on June 19, 2011, 05:12:27 pm

640x350, thats the same resolution as one of the res for PC EGA graphics (a predecessor to VGA)

Title: Re: vga converter board to use computer monitor in arcade cab
Post by: lilshawn on June 19, 2011, 05:51:49 pm

yes, but it's the 25.7khz that's the kicker.

the cga/ega frequencies the convertor can handle are

14.5 - 16.5khz -which is cga
23.5 - 25.5khz -which is ega
30.5 - 32.5khz -which is vga

as you can see, the frequency falls just outside into the space between ega and vga  :dizzy:  :censored: