ST color monitor as a TV?

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2 total messages Started by Allan Pratt Wed, 12 Mar 1986 04:26

#168

Author: Allan Pratt
Date: Wed, 12 Mar 1986 04:26

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I know that the monitor which comes with the Amiga has inputs which let
one use it as TV (with a VCR supplying the input, for example), and I
know that the ST monitor does not have such an input (I believe it's
called "composite").

My question is: is there hope for Atari users?  Is there any device which
will turn composite video/audio into RGB plus audio, as the SC1224 needs?

					-- Allan Pratt
				...ihnp4!inuxc!iubugs!isrnix!apratt

Re: ST color monitor as a TV?

#211

Author: jhs
Date: Mon, 17 Mar 1986 17:25

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Conversion of RGB to Composite signal can be done with a small amount of
circuitry.  I think there are IC chips that do most of the work.  You have
to construct luminance and chroma signals, which is just matrixing with
resistors, and then modulate the chroma signal on a 3.57945-MHz color
subcarrier and add it to the luminance to get the composite.  Or something
like that.  (I can get exact details for you if you wish.)


						John Sangster
						jhs at mitre-bedford.arpa
				 <anypath to ihnp4>!ihnp4!linus!mbunix!jhs

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