Hi Semir,
This
post documents my "Eureka" moment when I got Kat's idea to work with a Windows PC, simply by using a compatible graphics card and Jeroni Paul's
"WinModelines"
I use it for 405 lines, Peter Scott uses it for his pre war 405/240 line set.
I use this
modulator
and this very simple interface,
as described by Jeroni Paul.
Here's the system in action.
https://youtu.be/ahzdx4KgWBg