Path: utzoo!attcan!telly!lethe!yunexus!ists!helios.physics.utoronto.ca!news-server.csri.toronto.edu!cs.utexas.edu!uwm.edu!uwvax!jomby.cs.wisc.edu!kolstad From: kolstad@jomby.cs.wisc.edu (Joel Kolstad) Newsgroups: comp.sys.cbm Subject: Re: C128 Housekeeping Message-ID: <1991Feb6.001325.3292@spool.cs.wisc.edu> Date: 6 Feb 91 00:13:25 GMT References: <1991Feb4.155054.27418@cs.dal.ca> <1991Feb5.002513.26331@evax.arl.utexas.edu> Sender: news@spool.cs.wisc.edu (The News) Organization: U of Wisconsin CS Dept Lines: 36 In article <1991Feb5.002513.26331@evax.arl.utexas.edu> cs4344af@evax.arl.utexas.edu (Fuzzy Fox) writes: >In article <1991Feb4.155054.27418@cs.dal.ca> digdon@ug.cs.dal.ca (Mike Digdon) writes: >>About Reticulate... sorry to disappoint you, but the whole thing is just an >>illusion. It really isn't doing interlacing. > >Yes, it is an illusion, but when you get down to it, that's what >interlacing really IS, an illusion. > >When you interlace a picture, you draw half of the picture during 1/60 >of a second, then the other half for the other 1/60 of a second. If you >freeze the image with SS v5, what you are looking at is only half the >picture. You will notice if you do it several times that the two images >are slightly different from one another. Try it and see. > >The "net effect" when you alternate the two pictures ever 1/60 of a >second is that it "looks" like there is more resolution. This is >interlacing. > Now wait a second here. I've always been under the impression that to interlace something, you have to use DIFFERENT SCAN LINES for every other frame. I can certainly tell you that on my Amiga in 640x200 mode, there is a certain (black) gap inbetween each scan line on the monitor. In interlace mode, these black lines get filled in with more video. The C-64, on the other hand, is using the EXACT SAME scan lines on every other frame. (And unless one of you out there knows something I don't about the VIC chip, you can only scroll the screen in 1 pixel incremements...) I haven't seen the demo, so I don't know if it looks any better than standard 640x200 -- but I still don't think that the mothod it's using can be called true interlacing. Just my $.02... ---Joel Kolstad kolstad@cs.wisc.edu