AGP > TO EGA > TO RGB Syc!!! 50" TV

[Pee-Wee]

Pee-Wee is back! and with another question!.

A year ago i purchased 3 50"Monitors, all willing to plug a computer up to them!.

Now i have a few questions for those who are willing to help me!.

First off...

These monitors are a RGB and Syc input ... However, i am using a Computer with a Radeon 9200SE 128mb. I have a cable that is VGA one end , and stripped on the other end showing all of the cables (RGB;HV;G)

I placed the RGB and Syc to the correct BNC cables and the screen came up doubled in Boot-up mode ... the screen was rolling quikly and smoothly, but i want to elliminate the rolling and the split image.

I don't know how to do this. Is it by getting a EGA Graphics card?; Using a 3rd Party Application to give the 24k Output?; or some other way?.

I also have an intresting question for you to trace up,
How do you plug up an Nintendo 64 to it?; a Playstation 1?; a Dreamcast?
And what frequencies do these consoles give out?

Thanks
James Lovegrove
www.djjammi.co.uk

[Raven..]

What kind of monitors are they?  Post a pic and some more details.  (I'm pretty sure I know the answer though.)

[Pee-Wee]

Well, its a bit hard to tell...
But i think its a Hitchici , Or more information for you... its from the game Sega Rally Championship ... one of those big 50Inch tv's.

Ive gotton so close to this working now.

All of the colours are working, it shows all of the vision from windows in four separate boxes. I will submit a photo later on today.

The resolution from my Radeon9200SE is 1024x768 showing on 60hz.

Here is an intresting piece of information. This is a EGA monitor (but it doesnt like EGA frequencies). The lowest frequency my card can produce is 37hz(Interlaced).
The monitor doesnt like anything higher than 70hz, and nothing lower than 60hz! now that is wierd!

If you put it in another resoultion EG 800x600 / 640x680 It just shows a jumbled screen. Once on 1024x768 60hz with a feature called Compisite (which i belive is H and V together) it rolls extemely slow. Still needs a bit more work on focusing (Which is a pain because there is no remote board! you have to move the RGB Guns!)

So if any explination you guys / gals (if any), it sounds like something easy. all i want is the screen from corner to corner and to stop rolling!!!

Thanks

[Wade]

I don't think you are going to get it to stop rolling until you get your video card to output 25khz instead of the 31+khz you are sending with a vga signal.

Wade

[Pee-Wee]

Im not sure about that.
I don't fancy spending over

[Pee-Wee]

Actually ... I just found out how to upload photos!! .. here are the photos

[dabone]

Your monitor refresh rate does not equal your sync rate.

You are feeding your monitor signals outside of it's spec to run.


The safest way to get it to run is a avga card.

If thats not for you, look into advmame (dos is the easiest to get to run).
or powerstrip.

You can damage some monitors by feeding them vga signals.


Later,
dabone

[Raven..]

I used an older video card (maybe a Matrox, I'll have to look) and AdvMAME set for medium rez.  Worked just fine for me.  My monitor was out of convergence, but MAME worked (see my olllld post on it).  You need a VGA to BNC cable with the H and V syncs combined to connect it properly.  I never messed with trying to run Windows on it though.

Do a Google search for Medium Resolution MAME, there is a site dedicated to what a guy did to his setup.  It has the MAME settings and DOS config files available.

[Pee-Wee]

Yeah, i was once told a Matrox G800 (i think) would correct the problem.
It seems like a simple problem, just to get the horizontal to 24khz!

as i said before, its on 60hz X 7(?)Khz or something like that, and its rolling slow.

Would an ArcadeVGA Work for this problem? ... The MatroxG800 would be a hell of alot cheaper! ive seen them going for

[Lilwolf]

If its a med res only monitor.  I don't believe an arcadevga will do you any good.

[Pee-Wee]

I agree too ... Andy from Ultimarc said it can't do it.
Just got to go searching for that Matrox!!,

Is there anyone out there on this forum who has got a 50 inch arcade monitor and has successfuly pluged anything other than a arcade game up to it?

[Raven..]

Nope!  Unless you invest in a scan converter, nothing else is going to output medium res.  I believe HAPPs has a san converter, but they are a bit expensive.  (8-liners.com might also).

Eric

[Pee-Wee]

you got to be joking! ... happ controls are such a rip off!,
no chance im gonna buy that! too expencive!, surely there must be a graphic card still around that outputs on EGA monitors, ive seen graphic cards for CGC Monitors! and EGA is slightly better than CGC! so there's got to be something!.

IBM created EGA i belive ... so perhaps they are the manufacts, im not sure, i'l have a look!

As for the scan converters ... im situated in the UK, so il check for any UK companies that sell things like that.

There Has to be an anwser!!!

[dabone]

Ok, remember that CGA,EGA,and VGA for the PC and CGA,EGA,andVGA for arcade monitors do not equal the same thing.

PC CGA and EGA were RGBI monitors with DB9 pinouts.
The I in RGB is for intensity. These monitors only understood on and off for the gun, no variable voltages to tell it how much of the color you wanted.
(So for a cga you had 8 colors, and ega had 16)

CGA ran with a 15k scan rate, this is the same as a standard tv (I.e. RGB scart)
EGA ran with a 25k scan rate.

(EGA pinout for a sample)

Pin    Name    Description
1   GND   Ground
2   SR   Secondary Red
3   PR   Primary Red
4   PG   Primary Green
5   PB   Primary Blue
6   SG/I   Secondary Green / Intensity
7   SB   Secondary Blue
8   H   Horizontal Sync
9   V   Vertical Sync

Now the arcade industry, just took the names of the pc standards and applied them to the monitors that had the same scan rate, (But not the same inputs)
All arcade monitors are analog and can display unlimited colors.

Standard arcade pinouts are

1 - Video red
2 - Video green
3 - Video blue
4 - Ground
5 - Vertical positive sync
6 - Horizontal positive sync
7 - Ground
8 - Vertical negative sync
9 - Horizontal negative sync

Now most pc video cards with standard drivers will not output a lower then 56k scan rate. To get them to do this you have to use a different program, like powerstrip (Pain in the @@#@$, or advmame under dos or windows, (still a pain in the A@$@ but a little easier than powerstrip).

To get that monitor to work you will need to output 25k (Or maybe 15k, some monitors can switch between standard and med. resolutions)

Your best bet is probally advmame which supports the following video cards.

Under windows..

http://advancemame.sourceforge.net/doc-cardwin.html

Under dos.

http://advancemame.sourceforge.net/doc-carddos.html


And for support they have a forum at.

http://sourceforge.net/forum/forum.php?forum_id=313511


Also, if you can find the exact model number of your monitors someone might be able to tell if it can do standard res (15k) and then the arcadevga is your easiest solution.


Later,
dabone

[Raven..]

you got to be joking! ... happ controls are such a rip off!,
There Has to be an anwser!!!

Like I said, you can run a PC on medium rez for MAME.  But to hook up a game console you would HAVE to use a scan rate converter of some kind.  None of them will natively output 25kHz.

[Pee-Wee]

Oh ... thats ok then ... i thought you said it wouldnt work at all then! (me jumping to conclusions!) , so ... how do i get this computer to play MAME in dos? ... the thing i do at the moment is run windows then type in command.com ,,, so ... do i have to modify bootup stuff or something?