Question on special video out feasibility with Parallax
I am working on a project and want to know if any of the Parallax processors can generate the video out signals I need. I've been looking at samples and forums and see the ease with which VGA, Composite and even Broadcast signals can be generated, but haven't found anything too close to what I need yet.
I am trying to interface to an older monochrome monitor which takes video, hsync, and vsync as inputs. In the original system this was driven by a 6845 display chip (super common back in the day). The frequencies, in this case, are close to composite, but not quite and of course the separate h/v sync lines is also a difference.
HSYNC is 15.863 kHz (63.04 µs, with a 5.12 µs positive pulse)
VSYNC is 60 Hz (measured at 59.973 Hz - 16.67 ms with a 1 ms negative pulse)
Is this something I could achieve with a Parallax product? Can anyone point me to a project where someone has done something similar? I know it can be done with an AVR, but I wouldn't call it easy.