Modeline 405 line Monitor
Posted: Sat May 14, 2022 4:55 pm
The idea behind say of a a 240 line or 405 line monitor is not so much the problems of making one but having some thing to display to it to make it work in the first place .
Once again modeline and a windows PC can ease the way into helping make one .
viewtopic.php?f=8&t=2548
In the above information you can see with the right video card you can output the video and separate line and frame sync for a home made 405 line monitor instead of using a mixed video with sync to a RF modulator to a old 405 line set which pretty much do not exist in my neck of the woods my idea is first make a monitor that uses the line and framing sync right from the pc video card ,make a video and sync separator later ,so much easier .
The whole idea comes down to first will my 2nd HDMi to VGA adaptor cooperate mode line says my newer Laptops Video chip is correct this is the 2 VGA ports taken care of .
Next will be with the modeline program output the correct wanted video system .
If that works it would be worth knocking together a monitor ,i can't use a old electrostatic tube do to the dot size is to large for coming system ,i have some magnetic tubes laying around so being able to do 625 line 405 will be fine for this project .
Now depends on how vintage we are going ? were the original 1936 405s television CRT tubes phosphor Green ,i have one of those handy not from the time but its phosphor is Green i will have a think about that one .
Always a way to do something not always the way you expect .
Once again modeline and a windows PC can ease the way into helping make one .
viewtopic.php?f=8&t=2548
In the above information you can see with the right video card you can output the video and separate line and frame sync for a home made 405 line monitor instead of using a mixed video with sync to a RF modulator to a old 405 line set which pretty much do not exist in my neck of the woods my idea is first make a monitor that uses the line and framing sync right from the pc video card ,make a video and sync separator later ,so much easier .
The whole idea comes down to first will my 2nd HDMi to VGA adaptor cooperate mode line says my newer Laptops Video chip is correct this is the 2 VGA ports taken care of .
Next will be with the modeline program output the correct wanted video system .
If that works it would be worth knocking together a monitor ,i can't use a old electrostatic tube do to the dot size is to large for coming system ,i have some magnetic tubes laying around so being able to do 625 line 405 will be fine for this project .
Now depends on how vintage we are going ? were the original 1936 405s television CRT tubes phosphor Green ,i have one of those handy not from the time but its phosphor is Green i will have a think about that one .
Always a way to do something not always the way you expect .