moe@milton.u.washington.edu (Joe Shippert) (04/16/91)
I've recently come across several games that can be configured to run
on either a CGA monitor or 'Color TV or Composite Monitors'. The TV
option doesn't work on my VGA and the CGA graphics are pretty limp.
My question is: What is a composite monitor and can I hook a regular
old television set to my computer and use it as a monitor, How? Any
help or references would be greatly appriciated.
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moe@milton.acs.washington.edu
"If you see me rockin',
don't bother knockin'!"gah@hood.hood.caltech.edu (Glen Herrmannsfeldt) (04/17/91)
Composite video and monitors.... THe timing characteristics of CGA are essentially the same as those of a regular TV set. They are supplied as separate RGB, and as composite video. The scan rates are the same. The CGA manages to make color in composite video by having the dot rate be 4 times the color subcarrier frequency. 4 times 3.579545 MHz = 14.31818, sounds familiar? This way, certain dots come out certain colors. Now, you also need a signal, called the burst, that tells a color TV that it is a color signal. The CGA will optionally make this. This is probably what you can turn on and off. I don't know if EGA and VGA in CGA mode can do this.