Topic: Shit Picture With Vga Mod (Read 187 times)

ferrari_rulz_02 · « **on:** September 29, 2005, 02:16:00 AM »

hey all,

i recently got the vga mod running on my xbox.

the monitor that im using only supports 480p, so thats what i have it running at.

the problems is that most of the games, and dvd's especially, look real shit.

like running it over just standard composite a/v look a million times better. i know that the dvd's would look better if i have the xbox outputting 720p, but i would have thought that 480p is better then what the xbox outputs on composite.

i got the xbox in HD mode (swicthed from PAL to NTSC to run it), not native VGA.

can anyone help me?

cheers

ferrari_rulz_02 · « **Reply #1 on:** September 29, 2005, 06:53:00 PM »

Rebel-Soul · « **Reply #2 on:** September 29, 2005, 07:13:00 PM »

hmm im interested in knowing this too cuz i want to do this mod... can u do it to any monitor?

ferrari_rulz_02 · « **Reply #3 on:** September 29, 2005, 08:11:00 PM »

QUOTE(Rebel-Soul @ Sep 30 2005, 12:24 PM)

hmm im interested in knowing this too cuz i want to do this mod... can u do it to any monitor?

ferrari_rulz_02 · « **Reply #4 on:** September 30, 2005, 01:37:00 AM »

QUOTE(gwellan @ Sep 30 2005, 06:38 PM)

Anyway, if by "shit" you mean a green tint in the image, adjust your monitor colors by reducing green, and maybe (probably) boosting blue and red. Works great for me.

ferrari_rulz_02 · « **Reply #5 on:** September 30, 2005, 02:19:00 AM »

just out of intrest, what resolution are dvd's generally made in?

and what is the resolution of the standard composite video (if it has a set resolution)?

ferrari_rulz_02 · « **Reply #6 on:** September 30, 2005, 05:53:00 AM »

QUOTE(fahrenheit @ Sep 30 2005, 10:51 PM)

PAL DVD's are 25fps, 575i, so playing them back on a progressive monitor in a lower resolution (480) might give poor results depending on the software you are using for playback. DVDX2 patched for progressive plays PAL DVD's fine for me.

ferrari_rulz_02 · « **Reply #7 on:** September 30, 2005, 06:14:00 AM »

QUOTE(fahrenheit @ Sep 30 2005, 11:06 PM)

Sounds like hardware then.

gwellan · « **Reply #8 on:** September 30, 2005, 11:04:00 AM »

Hum, I searched the forum a lil bit and it seems that people who added resistors complain to have a bad image so it might be your problem. I still would want to know what you added though as I want to try it out for myself.

leeloo5 · « **Reply #9 on:** September 30, 2005, 11:36:00 AM »

my image looks fine with the cable i made. if you're not using a VGA bios but instead tried to alter the signal with a resistor that may be a problem.

With hexed dvdx2, the dvd movies look great on my 15 and 19" monitors. also, the games look fantastic.

if you are still concerned about the image i'd try using a VGA bios and setting up the circuit the way i did (follow my sig).

as a note, how are you able to use composite on your monitor? through a tuner card? when i used a s-video upscaller on my monitor, it looked like crap. Look in my sig for comparisons between the s-video signal and HD signal to get an idea.

gwellan · « **Reply #10 on:** September 30, 2005, 11:50:00 AM »

leeloo the website you're linking is just the same diagram as everywhere else, so the way you did is the way everyone did

I asked about the resistor to get rid of the green tint we got on a non-sog monitor, we get a green tint with the vga bios and lm1881, it's by far not as bad as when you don'T use a vga bios but it's there.

ferrari_rulz_02 · « **Reply #11 on:** September 30, 2005, 06:07:00 PM »

QUOTE(gwellan @ Oct 1 2005, 03:44 AM)

I'm curious here, you said you put resistors for the green channel so you get no green tint? Would you tell me what you added and where's it's different from the normal diagram? I really wanna try it out.

ferrari_rulz_02 · « **Reply #12 on:** September 30, 2005, 06:27:00 PM »

just tried it without the resistors.

the image is still teh same quality wise, but has a green wash over it.

does anyone else get the green wash when they do this? what is causing it?

i though that the vga bios is meant to remove the green wash, but it doesnt. thats why i have the resisitors there.

ferrari_rulz_02 · « **Reply #13 on:** September 30, 2005, 07:18:00 PM »

QUOTE(gwellan @ Oct 1 2005, 11:47 AM)

It does remove the green image, on a sync on green monitor that is. It also does remove a lot of the green on a non sync on green monitor, but it's not perfect as you saw. I can make the green tint dissapear almost completely with my monitor settings when I use the vga bios, but not with a normal bios, there's too much green, so the vga bios sure does something.

leeloo5 · « **Reply #14 on:** October 01, 2005, 09:48:00 AM »

i never said my diagram was different, it just shows the pins for a cable not the motherboard, and in a plain easy to read way.

also, a vga bios does this, it transforms a YPbPr signal to RGB (and yes it doesn't work on all monitors because the LM1881 isn't the best sync splitter in the world). if you look at this site you can see that RGB and YPbPr are very different things and so its not just adjusting the green values. If you do use a VGA bios, adjusting the RGB values on your monitor might help a bit if the picture is off. I have a ton of monitors hanging around, and about 60% of mine have worked (CRT and LCD).

also, you wont notice the crappy quality of a TV picture (i can, but if you just see a picture it'd look fine) since the resolution is so low, but we're used to it. So you can't really compare what an image looks like on a tv to a pc monitor. If you want an idea of what the HD xbox signal can look like check my site. it'd give you a rough estimate. all i can say, is if you get a monitor that works, the image is amazing (or an HD projector).

Author Topic: Shit Picture With Vga Mod (Read 187 times)