Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!uakari.primate.wisc.edu!caen!uwm.edu!bionet!agate!pasteur!dog.ee.lbl.gov!nosc!ucsd!mvb.saic.com!ncr-sd!serene!cbmami!jason From: jason@cbmami.UUCP (Jason Goldberg) Newsgroups: comp.sys.amiga.graphics Subject: Re: NEC 3D owners please read! Message-ID: <18d469bd.ARN0f0e@cbmami.UUCP> Date: 15 Mar 91 09:58:05 GMT References: <236@nos850.UUCP> Reply-To: jason@cbmami.UUCP Followup-To: comp.sys.amiga.graphics Lines: 55 >In article <236@nos850.UUCP> joem@nos850.UUCP (Joe Muller) writes: > >> Ok people, I've posted this once before and got (what I thought) was >>a straight answer. Now I have been reading about people who have >>been 'using their NEC 3D with their display enhancer perfectly' and this >>is driving me batty. I own a NEC 3D and I WANT a display enhancer but >>I would like to know if ANYONE has encountered ANY problems AT ALL using >>the NEC 3D in conjunction with the A2320 display enhancer. Help! >Although I do not own a display-enhancer or Nec 3D, I do remember >something from a technical post a few weeks (months?) ago about a problem >with some early copies of the display-enhancer. Something about a resistor >on the board of the wrong value. This could be what has (?) caused problems >in the past. The A2320 puts out a de-interlaced signal which is runing at approx 30Hz (I don't have the number in front of me). The NEC 3D can definately handle that speed. So if you want to look at the deinterlaced output (from your A2320) on your NEC 3D it will work fine. However, the A2320 has a switch to go back to normal interlaced output and for that switch to work your monitor has to support a speed of like 15Hz. Many Multi-Syncs will not support that slow of a speed, I believe that the NEC 3D (along with the A1950) is one of the only "Multi-Sync" monitors that will go that slow. So you will even be able to do that with your 3D, the only time you would want to would be if you were using the ECS SuperHires mode which the A2320 does not support (no current de-interlacer does). If all you want is the deinterlaced output (30 Hz) then you can even use a VGA style monitor. You just won't be able to turn your A2320 off like you can with an A1950. Once again I stress there isn't much reason to want to turn it off. The one disapointing thing about the Nec 3D is that it has a slightly larger scan area than the A1950 and unlike the A1950, you can't adjust the horizontal and verticle size of the picture. What this means is that on the A1950 I can adjust the picture to fill the entire monitor, while on the NEC 3D I will have black borders around the whole picture. A side effect of the Amber chip that the A3000 and A2320 use to de-interlace is that the first 1/2 of the top scanline still flickers, on a properly adjusted A1950 this can't be seen, but on a NEC 3D you will see it. No big deal... The comment about an incorrect resistor has nothing to do with an A2320 working on an NEC 3D. That refers to a bug on the A2320 which caused two levels of grey (777 and 888) to appear the same in the de-interlaced mode, the addition of a $.01 resistor corrects this situation and any authorized service center should be able to take care of it. Goodluck, -Jason- --------------------------------------------------------------------------- Jason Goldberg UUCP: ucsd!serene!cbmami!jason Del Mar, CA