Has anyone tried this O2 mod?
The RGB output circuit has been copied from the Videopac G7200 console.
It's the circuit that is enclosed in the red line in the schematic below.
The signals of this circuit with the numbered red dots should be connected to the corresponding numbered red dots in the schematic of the Odyssey2 console below. For dots 5 and 6 an inverter should be inserted before connecting them (74LS04).
If yes, can you help answer the questions below.
Between IC653 and IC652 there is a vertical black line. Is this to denote a header to G7200's CRT and hence is not needed for O2 RGB board?
Does IC653 pin 11 connect to IC652 pin 9 and pin 13?
Does IC653 pin 8 connect to IC652 pin 3
What does "&" mean inside of IC653?
What does "1" mean inside IC652?
I assume IC656 is not needed as its not in the red area, does that sound right?
I think these two are related to SCART pin 8/select and pin 16/blanking. Do you agree?
Are D698 and R749 needed? If it is needed where does one pick up +2v. Signal name is Status CVBS. Perhaps this is optional.
Is R723 needed, this appears to be a resistor connected to +5v, signal name is Status RGB. Perhaps this is optional.
IC652 is 7407
IC653 is 74LS08
IC656 is 74LS08