CGA TO VGA CONVERTER question

purple · Oct 10, 2007

im going to buy that soon...anyone know if wiring pin ''P'' (video sync) on jamma to Cga input 1 pin 5 ok?

Xian Xi · Oct 10, 2007

purple said:
im going to buy that soon...anyone know if wiring pin ''P'' (video sync) on jamma to Cga input 1 pin 5 ok?

Yup, since they're together on one input. For input 2 you probably need a sync seperator.

purple · Oct 10, 2007

thanks...i wonder which one gives me best result...seperate sync with lm1881? or without seperating...maybe the circuit itself using lm1881 to seperate sync...its best to buy the thing and look closely...thanks alot

Xian Xi · Oct 10, 2007

I was actually gonna pick one of those up a while back, let me know how it is.

norton9478 · Oct 11, 2007

purple said:
thanks...i wonder which one gives me best result...seperate sync with lm1881? or without seperating...maybe the circuit itself using lm1881 to seperate sync...its best to buy the thing and look closely...thanks alot

Best is to have it switchable....

LM 1881 can really improve shit on some boards/setups and wreck it on others.

Pas · Oct 11, 2007

Where do you get one? How much do they cost? That may be a cool little tool to have around.

purple · Oct 11, 2007

im planning to use it with my hyper64 setup...i will try both syncs...hey pas...search it on ebay...there are 35 available.

FalcomAdol · Oct 11, 2007

Pas said:
Where do you get one? How much do they cost? That may be a cool little tool to have around.

Here's an aussie selling one:

http://www.converters.tv/products/cga_to_vga/77.html

I think this is the same model:

http://www.highway.net.au/parts/converters/1488.html

Looks a bit more expensive than the converters that we're typically using here, but in the age of HDTVs with D-sub...might be worth the investment if it works well. Certainly cheaper than an XRGB.

Pas · Oct 11, 2007

Looks like they sell a 640x480 version as well which is a little cheaper:
http://www.converters.tv/products/converters/rgb_converters/41.html

purple · Oct 11, 2007

i found it cheaper on ebay...it shows that they have 35 more...but also shows that the item is ended...any ideas?

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=150159512781&ssPageName=ADME:X:AAQ:US:1123

TheOmen · Oct 12, 2007

Is that a "T-View" system? we used to build those at my job.

They work okay, but you lose some of your color pallet, and going to a TV, you lose resolution. If you use a newer TV set, they run about 1024x768 at 60hz refresh.

When we built them, the technology was still new. The newer generation might have overcome the hurdles we faced. Please post your results as I am curious.

Edit: I just went out to look at the product... That's cool... Going from game RGB to VGA. Novel idea if you want to stick a computer monitor in your arcade game.

purple · Oct 12, 2007

i just ordered it from converters.tv ...lets see what will happen..211 Australia dollars...

topher · Oct 12, 2007

let us know how it works. I got an open case vga monitor that could use a home in a cab.

FalcomAdol · Oct 13, 2007

TheOmen said:
Is that a "T-View" system? we used to build those at my job.

They work okay, but you lose some of your color pallet, and going to a TV, you lose resolution. If you use a newer TV set, they run about 1024x768 at 60hz refresh.

When we built them, the technology was still new. The newer generation might have overcome the hurdles we faced. Please post your results as I am curious.

Edit: I just went out to look at the product... That's cool... Going from game RGB to VGA. Novel idea if you want to stick a computer monitor in your arcade game.

768 vertical lines would be perfect since most 720p monitors these days have 768 physical lines.

The Xbox 360 VGA output also has a degree of black fade, they introduced some sort of software solution that stretches the contrast a bit to compensate. I'm sure that something equivalent could be implemented in hardware.

purple · Oct 30, 2007

it arrived 4 days ago but unfortunately i having same problems at that link,

http://www.killercabs.com/forum/viewtopic.php?t=7051&sid=3163b2f730e3a140a1b67f4a07eca005

also top of the screen is distorted plus i get black screen for 2-3 seconds...i tried everything on that link but no result...i only didnt try to check grounds for resistance because i dont know how to do it...i only checked voltages and all ground points for disconnection...i will be glad if someone point me somewhere or something.

ill post pictures as soon as i get my camera back...thanks.

note: im using it with hyper64

Macck · Oct 30, 2007

Sorry about the NooooooB question.....but these converters works in LCD monitor or only in CRT ???

[]'Macck

topher · Oct 30, 2007

It should work with any VGA monitor.

FalcomAdol · Oct 31, 2007

Of course, on an LCD, you're going to have scaling artifacts if you're running input at anything other than the native resolution, or you'll potentially have a very tiny image centered in the middle of your screen.

purple · Oct 31, 2007

you wont beleive when i will post the pictures...the quality is very good...im getting 480p...the scaling is very good either...i found the problem today...i need to seperate the sync...i will use lm1881 ic...tomorrow it will be finished...

Xian Xi · Oct 31, 2007

Hey Purple forgot to ask, what are the dimensions of this board?

purple · Nov 1, 2007

14.5x116x92 mm

CGA TO VGA CONVERTER question

Geese's Thug

JammaNationX,

Geese's Thug

JammaNationX,

So Many PostsNo TimeFor Games.

Camel Slug

Geese's Thug

Fio's Quartermaster

Camel Slug

Geese's Thug

n00b

Geese's Thug

Tesse's Maintainence Man

Fio's Quartermaster

Geese's Thug

Edo Express Delivery Guy

Tesse's Maintainence Man

Fio's Quartermaster

Geese's Thug

JammaNationX,

Geese's Thug

So Many Posts
No Time
For Games.