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- Path: sparky!uunet!cis.ohio-state.edu!magnus.acs.ohio-state.edu!usenet.ins.cwru.edu!po.CWRU.Edu!mal11
- From: mal11@po.CWRU.Edu (Matthew A. Lewis)
- Newsgroups: comp.os.linux
- Subject: calculating resolutions for X
- Date: 6 Sep 1992 23:07:48 GMT
- Organization: Case Western Reserve University, Cleveland, OH (USA)
- Lines: 53
- Message-ID: <18e304INNs73@usenet.INS.CWRU.Edu>
- Reply-To: mal11@po.CWRU.Edu (Matthew A. Lewis)
- NNTP-Posting-Host: thor.ins.cwru.edu
-
-
-
- i'm trying to get my Xconfig file set up for my
- Orchid Prodesigner IIs and NEC 4FG. Unfortunately, I've
- found some troubling numbers.
-
- According to the setting of the DIP switches on the
- back of the SVGA card, the following refresh rates and resolutions
- go together: 640x480 72Hz
- 800x600 72Hz
- 1024x768 70Hz
-
- and the card is in some sort of accelerated mode.
-
- Now.....if I calculate backwards with these numbers, I get a clock timing/
- driving frequency of about 55Mhz for the 1024x768 mode.
- I used the equation in video.tutorial. Now if I run
- clock.exe.....I get the following numbers (i ran it several time):
-
- detected clocks: 25.2 37.9 18.9 45.0 25.2 37.8 18.9 45.4
- detected clocks: 25.2 37.9 18.9 45.0 25.2 37.8 18.9 45.3
- detected clocks: 25.2 37.9 18.9 44.8 25.1 37.6 19.0 44.8
- detected clocks: 25.2 37.9 18.9 45.0 25.2 37.8 18.9 45.0
- detected clocks: 25.2 37.9 19.0 45.0 25.2 37.8 18.9 45.0
- (BTW, do I round these????? and why????)
-
- However, according to vga.dbase......this card should have
- some high clock timings..........
- vga.dbase lists25 28 32 36 40 45 75 65
-
- Why doesn't my card read those higher frequencies??? i should read at least
- have 55 cuz I have used 1024x768 under windows.
-
- In addition....I assumed that my card did have 65 as a clock timing and
- when I followed the custom setup directions in video.tutorial and
- came up with the same numbers as the example, they failed to work.
-
- The specs in my monitor docs seem to say that it is VESA compatible.
- I'd really like to have 1024x768.....and not a custom mode........
- but the settings in vga.dbase don't work for me. i assumed
- that NEC 4d and my 4fg were similar. that might be a flaw.
-
- Anyways.....if anyone has any ideas about thes clock timing.....or
- if they have this same setup....i really like to hear from you.
-
-
- I wonder if I have VCO's that don't have enough juice.......
-
- --
- MaThiEu a. LeWis "There is no middle ground/Or that's how it seems/For
- Thieves Like Us us to walk or to take/Instead we tumble down/Either
- mal11@po.cwru.edu side left or right/To love or to hate."
- -A Strange Kind of Love
-