Megadrive/Genesis Switchless Mod

[simonbelmont2]

Here is the schematic:

About the resistor: the minimum is 200Ω and the maximum is 1kΩ.
About the reset:  pin 18 at the CPU 68000.
If you want to have a brighter led use less Ω.
In my example I use 300Ω R.
Credits go to Calpis from assemblergames (I've inspired from his schematic).
If you have questions, don't hesitate to e-mail me.