Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!wuarchive!uunet!mixcom!oovvoo From: oovvoo@mixcom.COM (Mike Shawaluk) Newsgroups: comp.sys.amiga.hardware Subject: Re: Super Hi-Res Message-ID: <1024@mixcom.COM> Date: 15 Jun 91 13:04:22 GMT References: <1991Jun11.223859.15615@ariel.unm.edu> <1345@cbmger.UUCP>, <1991Jun14.182918.29452@news.iastate.edu> Distribution: usa Organization: Milwaukee Information eXchange (Public access Usenet, Email) Lines: 33 In <1991Jun14.182918.29452@news.iastate.edu> taab5@isuvax.iastate.edu (Marc Barrett) writes: > Unfortunately, for Super-HiRes to look right, it *MUST* flicker. You >don't get your cake and eat it to, so-to-speak. The Display Enhancer >messes up the Super-HiRes mode when it removes the flicker. It only looks >right when it flickers. (BTW, this is on systems with Display Enhancers, >such as the A3000) I just installed my A2320 card, and am using it with a Mitsubishi Diamond Scan, but I don't have the ECS yet in my A2000. However, from what I read in the manual, I think Marc is on the wrong track; displaying SuperHiRes has nothing to do with flickering! What my manual tells me is that (not in so many words) because the A2320 (and presumably the equivalent circuitry in the A3000) has to buffer up a screen's worth of pixels, for either scan doubling or deinterlacing, that it doesn't have enough on-board RAM for the 1280 pixel lines (or maybe more correctly, that it can't sample that many pixels per line, which would explain why it skips every other pixel). Now, depending on what monitor a person has, they may not see much difference at that resolution (1280 is a *lot* of pixels per line). The words in the A2320 manual are: "Still another Amiga display mode which uses the ECS under AmigaDos 2.0 is 'Superhires' mode. This mode has a display of either 1280 x 200/256 or 1280 x 400/512, with 4 colors out of a palette of 64, and a raster rate of 15.734 KHz NTSC (15.625 KHz PAL). In this display mode the A2320 only samples every other pixel and may cause a distorted display, so you should set the mode switch on the back of the A2320 metal bracket to the Bypass mode (flip the toggle switch to the right, away from the fan)." Note that this has nothing to do with interlace; the same instructions apply to the interlaced AND non-interlaced versions of Super-HiRes. - Mike-- - Mike Shawaluk (oovvoo@mixcom.com) "It is a good day to live."