Description
This little board mix the Hsync and Vsync signals from the Atari ST to produce a clean composite sync signal in order to connect to the GBS-8200 converter. It must be soldered on the top of the P3 connector and must be also connected to 5V rail (this can be obtained from the connector placed outside on the external power connector, see schematic of connection).
Also tested on:
Amiga
X68000
Schematic for amiga connections provided on the images.