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From: ron@brl-tgr.ARPA (Ron Natalie <ron>)
Newsgroups: net.micro.amiga,net.micro,net.micro.apple
Subject: Re: Amiga monitor
Message-ID: <1223@brl-tgr.ARPA>
Date: Wed, 4-Sep-85 15:05:37 EDT
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Posted: Wed Sep  4 15:05:37 1985
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> OK.  I give up.  Will somebody please explain what the difference between the
> various color input types are.   What is the difference between RGBI digital,
> RGB analog, and NTSC composite, and all the rest.  (The Apple RGB Color
> card produces something called XRGB, what's that?)
> 
RGB ... red, green, blue.  A separate wire for color signal.  There
may be a separate sync signal or it may be overlaid on one of the color
signals.   RGB analog is just that.  The Sony profeel monitors put schmidt
triggers on the RGB inputs which shape them into either zero or one values.
NTSC is what your TV set use (nick named Never The Same Color).  It is the
method of composing all the colors into a single video signal that is also
compatible with Black and White monitors.  They do this by making the primary
signal the black and white intensity, and then have some side signals for
the color.  Look up "color" in Foley and Van Dam.

-Ron