To further improve video quality on the Dragon 32 this board completely isolates the video circuits from the rest of the Dragon by making it a plugin. This also means that only a single version of the Dragon 32 board is needed to provide a PAL or NTSC solution.
This is a complete first hack at the design, while the schematics are trusted the layout and organisation of the line pulse logic is very much experimental.
The clock generator and analogue circuits are completely isolated. The ground plane on the analogue side of the board is as complete and uniform as possible.
Adopt the Dragon 64 voltage bias circuit for the output signal