I am new to computer graphic's card systems converter idea but its some thing i wanted to see if it was possible with modeline and with pretty much what i have .
I tried first to see if the program could detect my graphics chip 2 out of the 3 lap tops i have worked
They all have a VGA socked so can do dual screen...
After seeing this page
http://www.nostalgiatech.co.uk/Baird%20240%20lines.htm
i made the circuit first 2 picture's
I was not expecting the VGA signals to stop cut out when the monitor was unplugged and this circuit plugged in so it was a bit useless to me till i worked this out .
i needed a way to access the video signals and leave the monitor in place so i have spliced a vga cable to access the signals RGB and HV siganls ..now this worked .
I am using a old 625 line security camera monitor it have vertical and horizontal sync controls so that helps if as i expected they video may be way off 625 line standard ...its some thing to test the vga out put on and modeline program .
I have started here from scratch first day i just plugged in one colour channel to see if any thing could be viewed on the monitor ...rather ruff results yeasterday.
Today i worked out the line frequency must be at double with 2 images showing if that sounds right ..last picture i will add more on next post .