fangchin@portia.Stanford.EDU (Chin Fang) (02/18/91)
I have posted flicker free set up for X386 using 32Mhz and 36Mhz timings respectively. A while ago, I had a discussion with shite@sinkhole.unf.edu and he suggested me look into 640x480 using lower clock timings. Now I have come up a *very good* setup as long as you are willing to tolerate 640x480. name clock horizontal timing vertical timing flag "640x480" 28 640 676 776 812 480 480 485 505 No special flag necessary. You *MUST* have a NEC Multisync II (or a monitor with horizontal and vertical timing very close to it's) and a 28Mhz clock as determined by Thomas Roell's clock.exe. See my 2nd posting for NEC Multisync II's horiz. and vertical timings. The setup above give you 68.28 Hz refresh rate. This is *Rock Steady* for I would say 99% people! Very good for your eyes! Now a few comments and observations: (1) it seems to me that for a low end monitor like NEC Multisync, the best clock range lies between 28Mhz and 36Mhz given the monitor's horizontal and vertical timings. A clock timing lower than 28Mhz or higher than 36Mhz tends to *INTRODUCE* flicker! (2) non-interlace-ness alone will *NOT* guarantee you flicker-freeness. I personally feel the key is *high screen refresh rate*. Anything below 60Hz is not good to your eyes if you have to work in front of a monitor long, particularily with a white background. The setups that I have posted so far always has refresh rate higher than 63Hz. (3) It is recommended that if you have a more capable monitor than NEC Multisync II, you ought to try to push beyong 70Hz refresh rate in your setup. Don't be enticed by sheer resolution alone! I would prefer 984x738 to 1024x768 if the former enables me to have a 70+ Hz screen refresh rate but the later can't. (4) to owners of NEC Multisync II and it's close compatibles, I would suggest using this setup and if higher res is desired, the first setup that I posted (which has a 66+ Hz refresh rate. *almost* rock-steady!) Please direct your reponses, if any, to the following email address. Enjoy. Chin Fang Mechanical Engineering Department Stanford University fangchin@leland.stanford.edu