Sync on green in G400??

[lener]

Hello, I have a very good question! I have G400 and a screen Silicon Graphic. On several site, one suggests me a small circuit for synchronization on the green. On the other hand, one say to me that cards MATROX make already synchronization on the green. How can I activate this option?? On the forum of MATROX one could not help me and they referred to me here. I thus hope finally to find an answer. Thank you in advance

[gbm]

The chips have this capability, but Matrox drivers don't support it (=disable it during mode change). Try to use some external adapter to obtain SyncOnGreen.

[lener]

Do you know which could help me to modify the registers to allow my G400 to make synchronization on the green. I would like much better than it is my G400 which does that than to build a circuit. If there is somebody who can help me, to go there!

[wildman]

http://www.entechtaiwan.com/ps.htm

Hey, go here and download powerstrip demo, it can force Sync-on green from matrox cards, when you click the sync on green box, make sure you also click the composite sync box or you only get the horizontal sync signal on the green. The demo does not save settings though, you have to buy it.
This program is excellent for fixed frequency monitors, I have it running two.

Cheers
Benny

[wildman]

By the way, the registers do not seem to force sync on green since the Millenium II, I stuffed around with them for days with no success, I downloaded powerstrip and got my FF monitor working in 10 minutes. I got it working with a G200 and my current G400 DH
(however it does not seem to work properly with dual monitors, it is happier with only one, might be ok with two sync on green monitors though)

Cheers

[Rohde]

Any techie around who can spare a few minutes for an explanation to a poor tech-impared person ?

What is "sync on green" ? I'd really like to know

Torben R.

[wildman]

Sync-On-Green really only applies to Fixed frequency Workstation monitors that are not designed to run on a PC. It is how the syncronisation signal is sent to the monitor. Normally, there is a R/G/B signal and horizontal and vertical sync to tell the monitor when to go to the next line etc. These signals can either be separate, combined or superimposed on the green signal ie sync on green. Monitors with 3BNC connections are sync on green.

Why bother with fixed frequency monitors you ask with all this stuffing around?
Well, you can get a large second hand fixed frequency monitor still in good condition very cheap. I have two, an HP (Hitachi OEM) 19" that cost me $50AUD($30US) and a SUN 20" flat screen (SONY OEM) that cost me $120AUD. They only run at specific frequencies and resoultions, both of mine are 1280x1024 and 67Hz for the HP, 75Hz for the SUN, although I have found the SUN to be very tollerant of variations in signal (the HP would fail to sync if the refresh rate was more than +-3Hz, the SUN can still sync reliably most of the time as low as 60Hz and as high as 82Hz). They are quality monitors and very good for desktop work, but are no good for games which require changes in refresh rate and resolution, athough the SUN will run Quake 3 at 1280x1024, although it is choppy due to my system not being able to keep up, p2 266 256Mb.
If you dont play games, I highly recommend using them, they are far better value than new monitors. You still need a normal monitor around for dos/startup screens, but that is all.

Opps went a bit off topic, sorry.
Cheers

[Rohde]

Thanks a lot for clearing that up for me Wildman

Don't think I need another monitor, although they sound like a good bargain.

Torben R.

[beek402]

Is use two monitors:
An NCD (=brand) bought for $100, seperate sync 20"monitor with a trinitron tube.
it's a fixed frequency but it runs on almost any matrox at the resolutions:
800*600, 1024*768 1054*.., 1280*1024@72hz !!
no bootup screens visible, but very sharp image, it's a trinitron.
Also i have a SUN 20E20 which runs at 640*480 to 1280*1024!
no boot up screens, but again a 20" trinitron tube for only $200