RGB Mod
Written by SegaSaturn94
WARNING: As stated before, the resulting mod has jitter issues and permanently disabled the other inputs, so think of this mod as a foundation for further refinement. Do not attempt this mod unless you know for certain a solution to these issues.
The OSD mux method uses Sunthar's color coding convention wired to a SCART connector:
- The resistors in-line of the RGB, sync and blanking signals below and their values. You must calculate what resistors to put on the SCART board using Mark OZLAD's mux calculator. (You can also get sync from the composite signal if you so choose.)
- Below is how to wire the audio circuit.
- The IC located at QA01 is the OSD chip, model TMP87CM34AN. Tap the RGB lines inbound to that chip to inject your RGB signal.
- Recommended location of the SCART connector:
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