From: pcats@cryton.demon.co.uk (Patrick Arnold)
Subject: Re: TECH: LCD Screens 
Date: Thu, 23 Dec 1993 18:10:16 +0000
Message-ID: <756670216snz@cryton.demon.co.uk>
Organization: The Serial Port

There is another option to using a VGA to PAL/NTSC converter. Most
SVGA chipsets are much more programmable than most people realise, and
can be directly programmed to generate a screen mode that has the
correct timings and resolution for either PAL or NTSC. You then only
need to run the RGB signal from the SVGA board through an RGB to
composite video convertor, and there you go!

I have used both Trident and NCR chipset SVGA boards for this method,
and they both work very well. Most other chipsets should work. Most
will also generate a correct interlaced signal.

The RGB signal can be fed directly into the Panasonic LCD TV/monitor
by tapping into the RGB signal between the video decoder chip and the
LCD driver chip. In the ones I have used, it required the removal of
three surface mount resistors. The composite sync signal is fed into
the composite video socket.  The end result is very good. The
Panasonic LCD display has a much higher resolution and better
colour/black level than the Casio displays, although it is rather more
expensive. After all, you get what you pay for!

-- 
The shortest distance between two points has not yet been built.

pcats@cryton.demon.co.uk vox+44(749)670058 fax+44(749)670809 dat+44(749)670030