From pfau@coffee.enet.dec.com Sat Apr 10 13:57:33 1993 This is in response to your request for Xconfig settings for Paradise chipsets. I had a hell of a time trying to figure out modedb lines for my Paradise card until I upgrade to XFree86 1.2. The earlier software I had loaded didn't properly figure out my clocks. Now that I know the actual clocks available, I've been able to come up with various modes with relative ease. I have a WD90C30 based graphics option (built into the mother board). The system is a DEC PC420SX (Tandy built). The biggest problem I have is the monitor which is not quite up to handling the higher clock speeds available from the video option. The monitor is a PC4XV-B2 which is a 14" multisync monitor but only allows horizontal frequencies in the 30-37KHz range. It supports vertical frequencies between 50-90Hz. The clocks for the WD90C30 are 25, 28, 65, 36, 40, 50, 32 and 45. Using the guidelines in video.tutorial by Chin Fang, I put together a Lotus-123 spreadsheet to calculate some modedb lines. These are the best I've come up with: "808x606" 36 808 840 976 1016 606 606 611 636 "864x648" 40 864 872 1024 1088 648 648 653 680 "1024x640" 45 1024 1032 1208 1256 640 642 647 680 The last one loses on aspect ratio and gives a little snow but does allow 1024 across. The 864x648 mode is real clean and uses the full screen. I also had another mode figured out for 1024x768 interleave but will wait until the next release of XFree86 to make sure it works right. The current release doesn't properly support interleave on the Paradise chipsets. Hope this helps. If there are other modes you would like me to try, let me know and I'll see what I can come up with.