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From: oppenhei@umd5.umd.edu (Richard Oppenheimer)
Newsgroups: comp.os.msdos.misc,comp.sys.ibm.pc.misc,comp.windows.ms
Subject: Re: NEC 3D OK in interlaced 1024 x 768 ??
Message-ID: <7427@umd5.umd.edu>
Date: 13 Oct 90 15:06:26 GMT
References: <1618@mitisft.Convergent.COM> <1990Sep28.235629.15785@rick.cs.ubc.ca> <5061@hsv3.UUCP>
Reply-To: oppenhei@umd5.umd.edu (Richard Oppenheimer)
Organization: University of Maryland, College Park
Lines: 53

And now for my $0.02 :-)

In article <5061@hsv3.UUCP> you write:
>I'll add in my $0.02 on this one as well...
>
>In article <1990Sep28.235629.15785@rick.cs.ubc.ca> e4666881@rick.cs.ubc.ca (richard louie) writes:
>>     The NEC 3D should not be ran too long in 1024 x 768 mode
>>because of the feature referred to as interlaced.
>
>This almost sounds as if you're implying that this can damage your monitor
>or something in some way.  Of course this isn't true.  The 3D is rated to
>handle interlace speeds just fine, for hours (days) on end.
>
>>     To get rid of this flicker effect, you can upgrade to the
>>NEC 4D or get the SEIKO CM-1450 or the Sony 1304.
>
>This is the part which I've heard far too often and is really misleading.
>(I've even seen ads from monitor manufacturers which seem to try to
>perpetuate this myth, and even ones that imply that you can get "ergonomic"
>refresh rates just by using their monitors!)  Many graphics cards out there
>*ONLY* support interlaced 1024x768 modes, for the reason that you don't
>have to run the card as fast to do it (meaning a less-expensive design).
>If you hook one of these up to a 4D, CM-1450, 1304, or any other monitor,
>you will *still* get an interlaced display.  It's the card, not the monitor,
>which controls screen timings, and make sure your card can do 1024x768
>non-interlaced before you plop down the big bucks for an expensive monitor.

And some cards won't go down in speed to run in interlaced mode. An 
example of these "non-interlaced" cards is the Video-7 VRAM from Headland.
Put the VRAM and the NEC 3D together and you can't do 1024x768 at all even
though both the card and the monitor are rated for that res. The card 
wants to go fast (non-interlaced), but the monitor wants to go slow 
(interlaced). So when you are searching for a video subsystem to get you
a certain res., make sure when the board and the monitor are put together
they can truly deliver. The VRAM is a great card, but needs the NEC 4D or 5D.
The 3D is a great monitor, but it needs a 8514/A type card.

Now this is not to say that the 3D and the VRAM can't make music together.
They do perform nicely at 800x600x256 or lower.

Happy Hunting.


-- 
Computer Science Center		Richard Oppenheimer
University of Maryland		oppenhei@umd5.umd.edu (office)
College Park, Maryland ,USA	richard@wam.umd.edu (home)
****** My employer cares not what I think and knows not what I say. ********
-- 
Computer Science Center		Richard Oppenheimer
University of Maryland		oppenhei@umd5.umd.edu (office)
College Park, Maryland ,USA	richard@wam.umd.edu (home)
****** My employer cares not what I think and knows not what I say. ********