Newsgroups: sci.electronics.misc
Subject: Re: EGA Monitors??
References:   
"Branko Badrljica"  writes:

> Most EGAs have CGA compatibility mode, which is close enough to TV.
> I have used EGA monitors for computer as old as Sinclair's QL, Atari ST and
> Amiga.
> They work and I believe they would also work very nicely on the VCR.
> Don't worry about the lines stuff etc. What is important is horizontal and
> vertical scan rate.
> EGA's support at least two of each (vertically 50 Hz for CGA and 60 Hz for
> EGA and horizontally cca 15kHz for CGA and 30ish kHz for EGA). Anything that
> is close enough should be viewable, but it is likely that one would have to
> play with a few internal trimmers to stabilize the picture...


30ish kHz for EGA is not entirely correct. 22 kHz is more near.
Here is some more technical data on CGA, EGA and VGA:


Display type		CGA		EGA		VGA
------------------------------------------------------------------------------
Signal format		RGBI		RR'GG'BB'	RGB 
			TTL		TTL		analoginen *

Colors			16		64		262144

HSYNC			15.75 kHz	21.85 kHz	31.48 kHz
VSYNC			60.0 Hz		60.0 Hz		60.0 Hz/70 Hz

Bandwidth		14MHz		20MHz           30 MHz

Resolution      	640x200		640x350		640x480


--
Tomi Engdahl (http://www.iki.fi/then/)
Take a look at my electronics web links and documents at 
http://www.epanorama.net/