Sega Master System US
9v DC, 1A
pos --( o-- neg
Sega Genesis Model 1, Sega CD Model 2 US
9v DC, 1.2A
pos --( o-- neg
That .2 is why the master system does not work with a genesis "brick" as you call it because I know damn right its not the RF.
As long as the voltage, polarity, and AC/DC is correct, amperage can be higher. The system will simply pull what it needs. I know it works because I was using a Gen brick with my first SMS until I got the 'correct' one with my second boxed SMS.
When you buy a battery for your car, you do not have to match the amperage (the cold cranking amps) to some specific amount, you simply have to have enough for whatever your starter and weather conditions require. Larger engines and colder climates require higher amperage. If you want to buy a $200 big battery with 1000 CCA and cram it into a Yugo instead of buying the $35 dollar cheapo battery with 300 CCA, it will work because the starter will only pull what it needs.
I was trying to help you in the other thread and I have no agenda to keep you from playing your SMS. If you choose to ignore my correct information, it's your loss. You can see right above your post that I helped point D into using a Genesis brick to power an Odyssey 2 that had been previously shown to work with an SMS brick as well. You can continue to be stubborn if you want, but I am correct that it will work. If your SMS is not working with a Gen model 1 brick part number 1602, then there is something else wrong with it and you will simply be disappointed if/when you track down the model 3025 adapter that originally came with the SMS.