Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!olivea!uunet!cbmvax!hood From: hood@cbmvax.commodore.com (Scott Hood) Newsgroups: comp.sys.amiga.hardware Subject: Re: A2320 Message-ID: <18528@cbmvax.commodore.com> Date: 4 Feb 91 14:50:28 GMT References: <1991Jan29.054742.18143@cs.mcgill.ca> <3898@rwthinf.UUCP> <18245@cbmvax.commodore.com> <3901@rwthinf.UUCP> <189bc930.ARN13b6@venus.UUCP> <18435@cbmvax.commodore.com> <189ee486.ARN13cf@venus.UUCP> Reply-To: hood@cbmvax.commodore.com (Scott Hood) Organization: Commodore, West Chester, PA Lines: 45 In article <189ee486.ARN13cf@venus.UUCP> cbmvax.commodore.com!cbmehq!cbmger!venus!wfaust writes: >In article <18435@cbmvax.commodore.com>, Scott Hood writes: > >> What do you mean when you say "dynamic screen-repeat-rate"? The A2320 >> is the only display enchancer card that I know of that has a scan-double >> mode of operation when in non-interlaced Amiga display modes. This >> means that the A2320 just does a line repeat, instead of a de-interlace >> function. This operation then does not induce any motion artifacts with >> rapidly moving objects (good for games, animations, etc.) that would be >> induced if the device tried to de-interlace the data all the time (i.e. >> just like the MicroWay FlickerFixer, TM). This is also automatic and >> requires no software. > >Well, A2320 is not the only flickerfixer wich does double scan. As >I wrote before: MacroSystems deinterlace card does mainly everything what >A2320 does and more... > >"dynamic screen-repeat-rate" means, your flickerfixer can >output images with frequences other than 50Hz (PAL) and >60Hz (NTSC). For instance, I can use "Refreshtool" to change the >screen frequency from 60Hz (NTSC) to 70Hz(!) with a resolution of >640*400. The flicker is much less and I also have a much sharper >picture... :-) >----- >Wolf Faust UUCP:cbmvax.commodore.com!cbmehq!cbmger!venus!wfaust >Tel: (+49)69 5486556 FIDO: 2:243/43.5 I might mention that you can also do the exact same thing with the A2320! We have a PAL 70Hz display icon that under WB2.0 allows the user to display a 640(plus horizontal overscan up to 768) x 388 de-interlaced display at 70Hz refreash rate and no more system bandwidth problems of a normal 640x512 interlaced display. The Amiga actually puts out a 35Hz interlaced display that the A2320 or A3000 display enhancer de-interlaces to 70Hz! Hope this helps, Scott Hood -- -- Scott Hood, Hardware Design Engineer (A3000 Crew), Commodore-Amiga, Inc. {uunet|pyramid|rutgers}!cbmvax!hood hood@cbmvax.cbm.commodore.com "The views expressed here are not necessarily those of my employer!"