Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!yale!mintaka!bloom-beacon!bu.edu!mirror!ssi3b1!pselver From: pselver@ssi3b1.zone1.com (Peter Selverstone) Newsgroups: comp.sys.amiga.hardware Subject: Re: A2320 Message-ID: <1991Feb25.083655.20331@ssi3b1.zone1.com> Date: 25 Feb 91 08:36:55 GMT References: Reply-To: pselver@ssi3b1.UUCP (Peter Selverstone) Organization: Spy Pond Systems Lines: 45 In article rshaw@theborg.mlb.fl.us (Ron) writes: >Does the A2320 De-interlacer for the 2000 put out a strong enough signal to >completely drive a nec 3d? I installed the a2320 today & the nec 3d but it >seems as of the horizontal width control can not expand out the entired witdth >of the monitor (or maybe I will haveto re adujst the yoke. there is about a >1/4 " black jagged line running up the right side of the NEC? There are really two things going on here. First, computer displays which operate at the TV scan rate of 15.75 KHz behave like televisions; the image bleeds off the edge of the screen. Almost all other monitors display a black border around the active display area and expect that the image will be blanked electrically at the margins. The reason for this is that It is virtually impossible to properly converge an overscanned high resolution display. In addition, pincusion distortion is usually unacceptable at large scan angles. One exception is the Commodore A1950 monitor which has a switch which expands the image horizontally. However, every A1950 I have seen shows both convergence and distortion problems when set for overscan. I doubt that the monitor was actually designed to operate with such a large horizontal scan angle. The second problem is that the A2320 depends upon the new ECS Denise for it's right margin blanking. With the current "old" Denise chip, the moving, serrated pattern you describe is visible on the right edge. Unfortunately, the ECS Denise chip has not been released for use in the 2000. The Microway flickerFixer displays the maximum number of horizontal pixels possible when using the existing Denise without moving or flickering artifacts in any location. It was designed to operate with real-world monitors. When the ECS Denise is released, Microway will probably offer a field upgrade (just a socketed chip swap) which will increase the number of visible horizontal pixels. However in my opinion, for most flickerFixer owners the minor enhancements of the ECS Denise will not justify the expense. -- Peter Selverstone ...{mit-eddie,pyramid,datacube}!mirror!ssi3b1!pselver Spy Pond Systems pselver@ssi3b1.zone1.com Arlington, MA BIX:pselverstone PLINK:pselverst CIS:72527,2652