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[EvilWays]

As I understand it, the 74HC14 is only used to provide 75 Ohm termination. Right now, I'm still without a mobo, so I can't verify. I should be able to get one within the next week and I have several 74HC14s so I can try it out then and get the True Sync tut done. It might be a typo, but the only way to find out would be to try the mod. I'll keep ya posted on whatever I find out.

[EvilWays]

The LM1881 should work for all versions; however, the VGA BIOS will only work on v1.0 and 1.1 mobos.

[EvilWays]

None, since the VGA BIOS only works for 1.0 and 1.1

*UPDATE* It appears that IND-BIOS and Gueux'net groups are addressing this issue.

junkmonkey has hacked one of the IND-BIOS versions with VGA support for the Conexant chip, BUT this is more of a proof-of-concept hack and not official (judging from his post in the BIOS forum, he isn't a member of the group but the group was cool with his hack. Best of luck to him to become an offical member.) and should be considered "beta". This should be available in "The Usual Places".

Yoshi has also posted about adding VGA support in the Gueux'net BIOS. He mentioned v1.4, so if nothing else someone is taking a chance and trying to get the VGA support in Xboxes with the Focus chip. This looks to be a "beta" as well, as Yoshi was looking for people to help test it out since he didn't have a VGA cable.

So, to wrap things up...officially, VGA support is only available for v1.0 and 1.1 boards. Unofficially, work is being done to bring that support all the way up to v1.4, but is still in the test phase. BTW, the size of the BIOSes weren't mentioned.

[EvilWays]

QUOTE (nleahcim @ Oct 3 2004, 11:22 PM)

Nothing's even being worked on for 1.6s?

Too early yet, I guess.

The datasheets are available for the Conexant encoder chip, and I hear digging up datasheets for the Focus chip is a bitch. I don't know if the datasheets for the Xcalibur chip are publicly available or not...if they aren't, then it's all trial and error which makes working on VGA support take that much longer.

[fallafalla]

QUOTE

What I was working on (and am still planning to) was to tap the H/V-sync signals off of the video encoder and pass them through the VGA header. The signals would be passed through a 74HC14 Schmitt Trigger to terminate the singal with a 75 ohm load (for monitor safety reasons) and would require wiring six wires to the chip (two inputs, two outputs, Vcc (1.5VDC supplied from the encoder chip in this case) and ground. According to Oliver Schwartz and his article on Xbox-Linux website, this should alleviate the discoloration (I haven't tested this so I can't verify). This also alleviates the need for SoG ready monitors otherwise needed.

[EvilWays]

Yes. The required internal settings are disabled otherwise without a VGA BIOS.

Tapping H/V-Sync signals passing between the encoder chip and xGPU provides a "pure" sync signal that doesn't require a monitor with SoG capabilities or require sync splitting using the green signal. This should, at least in theory, result in at least less of a green "wash" of color for video.

[EvilWays]

An update to my update:

I just downloaded the IND-BIOS and Gueux'Net BIOSes and here are the sizes:

iND-BiOS.5001.VGA.b1-junkmonkey.bin - 256KB

Gueux'NeT-VGA-Focus-BFM.bin - 1,024KB
Gueux'NeT-VGA-Focus-Final.bin - 1,024KB
These last two are zipped together.