The Philips CM8833-II has a RGB connector which can accept both analogue and digital RGB signal. The RGB connector uses the following pinout:
_____________
5 4 3 2 1 /
\_9_8_7_6_/
-Pin- -RGB TTL- -RGB Analogue-
1 Ground Ground
2 Ground Ground
3 Red Red
4 Green Green
5 Blue Blue
6 Intensity Fast Blanking
7 Not used Composite Sync
8 H. Sync H. Sync
9 V. Sync V. Sync
Check your atari pinout, and connect the dots.. :)
