Post by: ferrari_rulz_02 on September 29, 2005, 02:16:00 AM
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
Post by: ferrari_rulz_02 on September 29, 2005, 06:53:00 PM
Post by: Rebel-Soul on September 29, 2005, 07:13:00 PM
Post by: ferrari_rulz_02 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?
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Title: Shit Picture With Vga Mod
Post by: ferrari_rulz_02 on September 30, 2005, 01:37:00 AM
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Post by: ferrari_rulz_02 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.
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Title: Shit Picture With Vga Mod
Post by: ferrari_rulz_02 on September 30, 2005, 02:19:00 AM
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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)?
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Title: Shit Picture With Vga Mod
Post by: ferrari_rulz_02 on September 30, 2005, 05:53:00 AM
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Post by: ferrari_rulz_02 on September 30, 2005, 02:19:00 AM
and what is the resolution of the standard composite video (if it has a set resolution)?
Post by: ferrari_rulz_02 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.
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Title: Shit Picture With Vga Mod
Post by: ferrari_rulz_02 on September 30, 2005, 06:14:00 AM
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Post by: ferrari_rulz_02 on September 30, 2005, 06:14:00 AM
QUOTE(fahrenheit @ Sep 30 2005, 11:06 PM)
Sounds like hardware then.
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Title: Shit Picture With Vga Mod
Post by: gwellan on September 30, 2005, 11:04:00 AM
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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.
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Title: Shit Picture With Vga Mod
Post by: leeloo5 on September 30, 2005, 11:36:00 AM
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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.
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Title: Shit Picture With Vga Mod
Post by: gwellan on September 30, 2005, 11:50:00 AM
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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.
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Title: Shit Picture With Vga Mod
Post by: ferrari_rulz_02 on September 30, 2005, 06:07:00 PM
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Post by: gwellan on September 30, 2005, 11:04:00 AM
Post by: leeloo5 on September 30, 2005, 11:36:00 AM
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.
Post by: gwellan on September 30, 2005, 11:50:00 AM
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.
Post by: ferrari_rulz_02 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.
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Title: Shit Picture With Vga Mod
Post by: ferrari_rulz_02 on September 30, 2005, 06:27:00 PM
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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.
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Title: Shit Picture With Vga Mod
Post by: ferrari_rulz_02 on September 30, 2005, 07:18:00 PM
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Post by: ferrari_rulz_02 on September 30, 2005, 06:27:00 PM
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.
Post by: ferrari_rulz_02 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.
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Title: Shit Picture With Vga Mod
Post by: leeloo5 on October 01, 2005, 09:48:00 AM
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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).
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Title: Shit Picture With Vga Mod
Post by: ferrari_rulz_02 on October 01, 2005, 04:26:00 PM
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Post by: leeloo5 on October 01, 2005, 09:48:00 AM
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).
Post by: ferrari_rulz_02 on October 01, 2005, 04:26:00 PM
QUOTE(leeloo5 @ Oct 2 2005, 02:59 AM)
also, a vga bios does this, it transforms a YPbPr signal to RGB
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Title: Shit Picture With Vga Mod
Post by: ferrari_rulz_02 on October 02, 2005, 12:34:00 AM
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Post by: ferrari_rulz_02 on October 02, 2005, 12:34:00 AM
QUOTE(DarkLegion @ Oct 2 2005, 01:52 PM)
Try looking at www.intersil.com, I can't remember the name of it but it shouldn't be too hard to find.Also have a look on www.gamesx.com for posts by a user name RARusk, he has had good success with the intersil sync stripper.
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Title: Shit Picture With Vga Mod
Post by: ferrari_rulz_02 on October 02, 2005, 01:15:00 AM
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ok, i think i found it.
according to this document byu intersil, you can use their el1883 chip and it automitically adjusts for the different signals.
what i dont get, is in one of rarusk's posts (here - last post) he talks about dropping the bottom two chips at the bottom of the diagram.
now, out of the top chip, is the VSync_out the vertical sync, and the Cp_sync the horizontal sync? or am i getting that confused with the H OUT and V OUT of the bottom two chips?
now, the other thing is that they also have this chip, which is auto adjusting. so would it be better to try and get a hold of one of these (see if i can get a sample), as its far less circuitry?
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Title: Shit Picture With Vga Mod
Post by: leeloo5 on October 03, 2005, 12:15:00 PM
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to clearify a bit. the xbox has no sync signals that can be output on seperate connections on the cable. RBG needs several connections, R,G,B, a vertical sync, a horizontal sync, and several grounds. The xbox has no sync signals that are seperate because it includes both H and V sync in the Green signal. So with the modified bios, the xbox outputs the RGB signals but still includes the sync signals in the green signal (SoG). but since many monitors dont support this, a sync seperator will pull the H/V sync signals from the G signal.
there are i think ways of pulling the signal off the motherboard, but i haven't tried and i dont know how successfull they were.
LCD monitors are in general not as generous with displaying odd resolutions (like 720p). my 19" LCD displays fine in 480p, but can't deal with the other resolutions. Its an Aopen one. You're probably better of with a decent CRT since you might be able to get 720p, and you'll most likely get a good 480p signal. The best monitor i've seen was a budget 15" monitor that could display all the resolutions perfectly.
Good luck.
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Title: Shit Picture With Vga Mod
Post by: ferrari_rulz_02 on October 04, 2005, 12:31:00 AM
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well i doubt that lcd's wouldnt be able to display odd resolutions. if your's doesnt, it would be just that screen
Post by: ferrari_rulz_02 on October 02, 2005, 01:15:00 AM
according to this document byu intersil, you can use their el1883 chip and it automitically adjusts for the different signals.
what i dont get, is in one of rarusk's posts (here - last post) he talks about dropping the bottom two chips at the bottom of the diagram.
now, out of the top chip, is the VSync_out the vertical sync, and the Cp_sync the horizontal sync? or am i getting that confused with the H OUT and V OUT of the bottom two chips?
now, the other thing is that they also have this chip, which is auto adjusting. so would it be better to try and get a hold of one of these (see if i can get a sample), as its far less circuitry?
Post by: leeloo5 on October 03, 2005, 12:15:00 PM
there are i think ways of pulling the signal off the motherboard, but i haven't tried and i dont know how successfull they were.
LCD monitors are in general not as generous with displaying odd resolutions (like 720p). my 19" LCD displays fine in 480p, but can't deal with the other resolutions. Its an Aopen one. You're probably better of with a decent CRT since you might be able to get 720p, and you'll most likely get a good 480p signal. The best monitor i've seen was a budget 15" monitor that could display all the resolutions perfectly.
Good luck.
Post by: ferrari_rulz_02 on October 04, 2005, 12:31:00 AM