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[yaywoop]

i think SOG is good enough for most people. I mean it works ok on every LCD I have tested. and most people haveLCD's now.
its annoying. I did that internal sync mod and a few days ago I got a LCD that supports SOG.
yeah i found the post where he explains it
I think its pretty good that we can get any VGA output on a console that wasn't supposed to support it with such little hardware

This post has been edited by yaywoop: Oct 4 2007, 02:21 AM

[patch6-]

yaywoop: yes, that one

Has anyone reading this made a working version of the circuit in http://forums.xbox-scene.com/index.php?sho...p;#entry4019291 ?

[yaywoop]

@patch6- I will try making one of punmaster's circuits with a MAX4383 and tell you how it goes. I think 210Mhz will be enough.
I have not really done anything much with analog circuits before but tell me what your problem is and I might be able to help you

[yaywoop]

I can't really notice the white tint on my new LG LCD (new because my neighbors where throwing it out, I don't know why it works perfectly)
however I did notice the white tint on both of my CRT screens. so I will attempt the RGB level corrector anyway. it looks really easy.
I was going to make a transcoder with these max4383's but I can't find the resistors for it. maybe I will just make a level corrector and VGA switch all in one instead

[patch6]

Made the circuit again, taking care not to have loose connections or bridging debris, and there was no change. The video output is very blurred and stretched out horizontally when the wiring follows the diagram for LMH6739 on that previously mentioned post, kind of like looking through a thick glass bottle. That's without the power connected. When power is connected, pulling 5 volts and ground from the pc's power supply, the screen blanks out.

When the discharge traces are wired to the respective inverting negative inputs, the screen blanks out as well upon testing, with or without power.

The power seems to be fine, measuring at 5 volts steady.

The vga ports are also wired correctly, and work when the circuit is bypassed.

I might try replacing the chip.

[johannesleung]

I think everytime I post something here I will share for you and you work on vga bios frosty, its well deserved and awesome, Iam trying to use your last vga bios with force 480p on pbl on my xbox harddrive, I downloaded the one from your last release with the boot disc and extracted the bios with quix but I don't know why I cant tunr the bios into 256k size, it alwasy give me an error about not being able to extract on xbtool. Some help would be really welcome since I play plenty of emulators and often change my video game from tv (friends house) and lcd (my house) so I want to keep using pbl from my hd to switch into vga mode and play my games.

[yaywoop]

why do you want it to be 256k?? you aren't going to try flashing it are you?
you are not supposed to spit this particular X2 bios into 256 anyway.

[johannesleung]

hmmm I tough it was necessary since my modchip use 256k bios, the last release I was able to change it sizes into 256 tough, whatever I will try one more time with the 512k size bios, I tried one time before but it would not boot.

[FrostyTheSnowman]

I would burn the ISO for 'VGA Boot Disc v1.0' to a DVD and then copy the PBL BIOS off that disc using your XBOX.

Optionally, you an also try another utility called 'Simple xISO' to extract the files from the ISO.

NOTE: Whatever you do, DO NOT flash this PBL BIOS to any modchip.

[yaywoop]

hey frosty. why did you chose the 5035?

[FrostyTheSnowman]

LOL, that's honestly the first time i've been asked that... (IMG:style_emoticons/default/happy.gif)

Here's my reasoning:

1. The X2 5035 is a full-featured BIOS, compatible with all XBOX versions that support VGA (1.0-1.5)

2. All modchips (not just Xecuter ones, unlike the X3 BIOSes) with a 512k or 1MB bank can use it (including v1.0-1.1 TSOPs)

3. It has an easy-to-use configuration file (all other BIOSes need to be modified using either EVtool or XBtool)

4. Xecuter BIOSes seem to be the most popular overall

So, the X2 5035 not only covers all the most important features in a BIOS, but it was also the easiest to modify and hack.  (in my experience, the Xecuter BIOSes are the most friendly to hacks) (IMG:style_emoticons/default/biggrin.gif)

Although, the EvolutionX team makes a great BIOS too. I may be releasing an Evox M8+ version with my most recent VGA hacks pretty soon.

This post has been edited by FrostyTheSnowman: Oct 13 2007, 07:20 AM

[bobbyblaze]

Hey Frosty, any news on the vga lead?

[smoke_screen_uk]

Hi everyone,
not been about for the last month or so due to being very busy on my electronics degree.  
Was just reading over a few of the recent posts here and noticed this one...

QUOTE(netfraggel @ Sep 22 2007, 02:24 PM)

Punmaster has right that LM1881 has not standard h-sync signal but v-sync ist standard. I looked on the datasheet of the LM1881. On Pin1 the LM1881 output is c-sync (composite sync). Some displays cannot extract h-sync from the c-sync signal. But we can extract h-sync from v-sync and c-sync with a logic circuit.

NetFraggle went on to explain how it could be possible to create an H-Sync signal using the V-Sync, C-Sync and some NAND gates.
This solution may work ok, though I feel there is a better solution.

The LMH1980 and LMH1981, successors to the LM1881.
I think I've mentioned these chips before but this time I thought I'd add the Pinouts this time so that people could see what I was talking about.


LMH1980 on www.national.com
LMH1980 Auto-Detecting SD/HD/PC Video Sync Separator Datasheet
Application Note 1618 LMH1980 Evaluation Board Instruction Manual
Application Note 1681 Design Migration from the LM1881 to the LMH1980




LMH1981  on www.national.com
LMH1981 Multi-Format Video Sync Separator Datasheet
Application Note 1599 LMH1981 Evaluation Board Instruction Manual

As can be seen from these two chips, they both provide H-Sync out. They also do not encounter the same problems as the LM1881 with Rset, which needs to be chosen in relation to the video format being used.

On the downside, unfortunately as these chips are both new devices, they come in very small outlines (chip sizes) so they are not easily used by hobbiests.  However, there are evaluation boards available on the national semiconductor site which can often be ordered as free samples.

I will be ordering all of the above components soon and be trying them out at university (because I can use the electronics workshops there). I will be sure to post back with my findings.  

Keep up the great work everyone, hopefully we'll see all the minor issues ironed out in the not too distant future.  

[bobbyblaze]

Hey Frosty!

Just wanted to say a big thank you for all your hard work. Plugged the xbox into my CRT projector with the component lead running 1080i RGsB and the little black box blew me away. Really stunning and the output puts my 360 to shame. Screw MS for not giving us 1080i VGA on the 360 Totally impressed at how mint the xbox looks.

Cheers Mate!

[FrostyTheSnowman]

QUOTE(bobbyblaze @ Oct 20 2007, 11:19 AM)

Hey Frosty!

Just wanted to say a big thank you for all your hard work. Plugged the xbox into my CRT projector with the component lead running 1080i RGsB and the little black box blew me away. Really stunning and the output puts my 360 to shame. Screw MS for not giving us 1080i VGA on the 360 Totally impressed at how mint the xbox looks.

Cheers Mate!

Hell yeah dude, i'm always happy to hear that people enjoy my work. You guys are the very reason why i've created so many VGA utilities.

I honestly think that Microsoft really hurt the original XBOX by not allowing it to produce VGA, because being able to play original XBOX games in native VGA really is a beautiful thing.

To answer your earlier question though, I do not currently have an update on the cable... I haven't heard from my contact over in China in over a month. At this point i'm not sure what the future holds for my cable, but I promise you guys will be the first to know.