Genesis Audio Out EXP Slot

[blackevilweredragon]

Ok, you know how on a model 2 Genesis, the EXP slot (used for Sega CD), can output it's audio to the Sega CD, so you can use the RCA jacks without a mixing cable?

Those exact pins, are they a "No Connect" then on a model 1 Genesis?  Because a model 1 Genesis don't output it's audio to the Sega CD (thus it needs the mixing cable)..

Cause, if the pins are not connected to anything then, on the model 1 Genesis, i plan to solder a connection...

[Epicenter]

You claimed a while ago you had an oscilloscope. Can't you just monitor those lines when the unit is functional?

[blackevilweredragon]

You claimed a while ago you had an oscilloscope. Can't you just monitor those lines when the unit is functional?

i do have an oscilloscope..   it's messed up though, it won't take anything over 1v  (i think the probes are shot)...

and im almost certain i'll end up tapping TTL level contacts...

[blackevilweredragon]

it's probably pins 27, since these are from a model 1 pinout..

http://www.gamesx.com/cartouts/gennyport.htm

I'll use a continuity test on the Sega CD on pins 27, and see if it goes to the audio...

[Epicenter]

Audio signal levels would probably be well below 1v. You're just looking to see if there is ANYTHING passing through there. If it's a 5V signal you were looking at you could also just attenuate it or put it through a resistor.