The GD50MLXD TFT 5" LCD Screen Review + VGA info

Tchay · **Posted:** Sat Nov 05, 2011 2:49 pm

If progressive scan is not an option, the screen will just display in VGA. So no, you will NEVER have to use composite if you have the component chip.

3 types of viewing on this screen:

composite - flax
VGA - sexy smooth
progressive - sharper more crystal version of VGA

Ashen · **Posted:** Sat Nov 05, 2011 3:29 pm

Looks like I will be ordering a component cable then.

Tchay · **Posted:** Sat Nov 05, 2011 4:07 pm

I got one for 40 bucks on craigslist. The guy lived 40 minutes from me. No joke.

You can find these suckers out there online for 40 bucks if you look in the right places.

I have 2 of them, both I spent 40 bucks getting. :awesome:

XCVG · **Posted:** Sat Nov 05, 2011 5:09 pm

I would like to know if what you describe as VGA is upscaled 480i or an actual RGB output. I don't know how one would confirm that, though.

Ashen · **Posted:** Sat Nov 05, 2011 9:12 pm

meh, found one on ebay for $80 ><

Just so I'm straight, this is the mod you are using right?

http://www.geocities.co.jp/Technopolis- ... /dac_e.htm

Tchay · **Posted:** Sun Nov 06, 2011 12:19 am

Ashen wrote:

meh, found one on ebay for $80 ><

Just so I'm straight, this is the mod you are using right?

http://www.geocities.co.jp/Technopolis- ... /dac_e.htm

Yes that is right.

@XCVG, most sites that mention the component cable seem to use VGA and RGB in the same sentence. I think most modders don't have a clear understanding of the differences. Geocities claims this is a mod to make a "VGA cable"

I found this online, clears up some confusion:

1. RGB is a color model while VGA is a video standard
2. RGB is used in a wide variety of applications while VGA is only used in interfacing displays
3. RGB defines the combination of colors while VGA defines resolution, color depth, and transmission
4. RGB is still used considerably while VGA has been superseded by better standards

If I understand it all correctly, this 5" LCD screen has VGA video, that can accept a 15khz RGB color model from the gamecubes "RGB modded" component cable. THEN, progressive scan (31khz) will kick in for about half the GC game library (being displayed through VGA video).

Quote:

When the GameCube was initially released there were two plugs in the back of the unit. One was for the standard AV plug that was used in previous consoles like the SNES and the Nintendo 64. The other was for a Digital AV plug which was used for Component Video and Digital Sound output.

To save space, money, and time the chip that was used to convert the digital signals to analog signals was placed INSIDE the cable (inside the plug that was connected to the GameCube).

Although the cable was meant to output Component Video someone managed to hack the chip to make it output RGB Analog Video instead. The hack is simple in concept but a little tricky in execution.

The cable was only available through Nintendo and was not sold through game or retail stores. Because of low sales of the cable Nintendo decided to remove the Digital AV plug in newer versions of the GameCube although you could still have the plug installed if you wished to have it.

As of February 2006, however, Nintendo no longer manufactures the GameCube Component Video cable.

Once the cable is modified the GameCube outputs great 15Khz RGB Analog video and does an excellent job on 31Khz Progressive Scan RGB Analog video.

However, most of today's VGA monitors won't do 15Khz RGB so you have to make sure that the GameCube game you are wanting to play on a VGA monitor is Progressive Scan capable. A lot of GameCube games, including the Game Boy Player, do support Progressive Scan but it should be noted that only the NTSC releases support it.

^ taken from http://www.gamesx.com/wiki/doku.php?id=av:gamecube_rgb

LOCtronics · **Posted:** Sun Nov 06, 2011 4:38 am

Let me clarify the rgb confusion.

When we talk about inputting RGB into a screen we talk about a Red,Green,Blue and composite sync (c sync) stripped from the normal composite video output.

When we talk about inputting VGA into a screem we talk about a Red,Green,Blue,H sync and V sync.

Both of them use the rgb lines but the frequency and refresh rate are determined by the sync signal.

This screen support composite and vga signal iput but not rgb + c sync. So you need the component cable for it to work.

XCVG · **Posted:** Sun Nov 06, 2011 9:05 am

I'm well aware of the difference between VGA and RGB, and how *Can'tSayThisOnTV* confusing it can be. In this context, I was referring to 15KHz RGB vs 31KHz VGA. The question I am asking is whether it's outputting 31KHz VGA all the time or only in progressive scan, outputting 15KHz RGBHV otherwise. If the latter is the case, we *should* be able to feed the screen RGB 15KHz with only a sync splitter.

Zenloc, I was talking solely about the refresh rate, NOT sync format. Sync can be split relatively easily IIRC. Doubling lines is much, much more difficult. In fact, if the screen is non-sensitive enough, you can probably just shove csync into both pins, but it might want proper separate sync.

We need a standardized definition of RGB vs VGA. How about this: RGB refers to 15KHz RGBS, unless otherwise noted. VGA refers to 31KHz RGBHV, unless otherwise noted.

Ashen · **Posted:** Sun Nov 06, 2011 11:10 am

Pretty sure this mod: http://www.geocities.co.jp/Technopolis- ... crgb_e.htm must be putting out 31KHz VGA ALL the time (whether the actual signal coming from the cube is progressive or interlaced doesn't matter apparently, as tchay says he gets video on screen all the time). As Zen said, he tried with his PAL cube's "RGB" output and a sync splitter (for fo VGA output) and input it to the VGA input on this screen and it wouldn't display video at all.

XCVG · **Posted:** Sun Nov 06, 2011 12:45 pm

Maybe the screen doesn't like PAL? The colour standard is a non-issue in RGB mode, but the refresh rate is different IIRC. Then again, I might be thinking of a different video standard.

Reading that site, the guy implies that the device normally outputs 15KHz RGBHV, but it is poorly translated so I can't be sure.

The GD50MLXD TFT 5" LCD Screen Review + VGA info

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