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From: phil@brahms.amd.com (Phil Ngai)
Newsgroups: comp.sys.ibm.pc.hardware,comp.binaries.ibm.pc.d
Subject: Re: Non-interlaced v. Interlaced SVGA monitors
Message-ID: <1991Jan14.210241.28242@amd.com>
Date: 14 Jan 91 21:02:41 GMT
References: <1991Jan11.174941.44244@vaxb.acs.unt.edu> <1991Jan11.175216.44245@vaxb.acs.unt.edu>
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In article <1991Jan11.175216.44245@vaxb.acs.unt.edu> ff76@vaxb.acs.unt.edu (Jhinuk Chowdhury) writes:
|1.  Are the monitors that have resloutions lower than 1024 x 768, always
|    non-interlaced?  That is, is interlacing something that becomes 
|    necessary to keep costs down for the 1024 x 768 display monitors, 
|    since the display density otherwise becomes too high?

I used to think so but then I discovered at least one VGA card that
runs a rather low frequency in 800x600x256 mode. Apparently there
was a problem with getting enough bandwidth out of the DRAMs in
that mode so they simply slowed down the screen refresh rate.
This was a card that used megabit DRAMs which obviously have lower
bandwidth out of the memory than cards that used (more of) smaller
DRAMs.

Anyway, it flickered like crazy! (I don't remember the exact frequency.)

This doesn't answer your question directly since you were asking about
monitors but the issue of displays is always a two part question with
both the monitor and the graphics adaptor playing important roles.

If you are just interested in the monitor, the answer is in general yes,
almost all multisync monitors are capable of running non-interlaced
below 1024x768. Of course, the original IBM monochrome ran a 50 Hz
refresh but had a long persistence phosphor.

|4.  What are some brands of non-interlaced monitors other than the
|    Sony 1304 and the Seiko 1450?  Where are they available and at what
|    kind of bargains?

You could get the NEC 4D. Of course, that's even more expensive.
One could question the value of 1024x768 on a 14 inch screen.


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