Yes, I was looking at that DCO1 FM-800 mod today in the schematics too. Basically, they're tapping into IC 4 and Pin7, with the nearby R 74.
If you trace that back to the Tone generation, you can see that it's taking Pins 28-31 from the MSM5232, marked as 1-2' to 1-16'.
So, basically, I'd say one could do the same with DCO2 by taking Pin 1 of IC 5, with R 75.
We'd need a multi-way switch for all the possibilities here.
If you trace that back to the Tone generation, you can see that it's taking Pins 28-31 from the MSM5232, marked as 1-2' to 1-16'.
So, basically, I'd say one could do the same with DCO2 by taking Pin 1 of IC 5, with R 75.
We'd need a multi-way switch for all the possibilities here.