Main Restorations Software Audio/Jukebox/MP3 Everything Else Buy/Sell/Trade
Project Announcements Monitor/Video GroovyMAME Merit/JVL Touchscreen Meet Up Retail Vendors
Driving & Racing Woodworking Software Support Forums Consoles Project Arcade Reviews
Automated Projects Artwork Frontend Support Forums Pinball Forum Discussion Old Boards
Raspberry Pi & Dev Board controls.dat Linux Miscellaneous Arcade Wiki Discussion Old Archives
Lightguns Arcade1Up Try the site in https mode Site News

Unread posts | New Replies | Recent posts | Rules | Chatroom | Wiki | File Repository | RSS | Submit news

  

Author Topic: vga converter board to use computer monitor in arcade cab  (Read 2269 times)

0 Members and 1 Guest are viewing this topic.

jspicher

  • Trade Count: (+1)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 128
  • Last login:March 09, 2023, 08:00:47 am
vga converter board to use computer monitor in arcade cab
« 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

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?


lilshawn

  • Trade Count: (+3)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 7513
  • Last login:July 04, 2025, 12:24:07 pm
  • I break stuff...then fix it...sometimes
Re: vga converter board to use computer monitor in arcade cab
« Reply #1 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.

jspicher

  • Trade Count: (+1)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 128
  • Last login:March 09, 2023, 08:00:47 am
Re: vga converter board to use computer monitor in arcade cab
« Reply #2 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?

lilshawn

  • Trade Count: (+3)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 7513
  • Last login:July 04, 2025, 12:24:07 pm
  • I break stuff...then fix it...sometimes
Re: vga converter board to use computer monitor in arcade cab
« Reply #3 on: June 11, 2011, 02:37:51 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.

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

lilshawn

  • Trade Count: (+3)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 7513
  • Last login:July 04, 2025, 12:24:07 pm
  • I break stuff...then fix it...sometimes
Re: vga converter board to use computer monitor in arcade cab
« Reply #4 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

StephenH

  • Trade Count: (0)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 544
  • Last login:January 09, 2023, 06:15:45 am
  • I'm a llama!
Re: vga converter board to use computer monitor in arcade cab
« Reply #5 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)

lilshawn

  • Trade Count: (+3)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 7513
  • Last login:July 04, 2025, 12:24:07 pm
  • I break stuff...then fix it...sometimes
Re: vga converter board to use computer monitor in arcade cab
« Reply #6 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: