Hi,
I just got my Mega Everdrive X7 to play on my Nomad ... I did the SMS mod on it so I have no problem playing SMS games but when using the YM2413 with some Japanese games that supports it, I simply have no sound ... Are there some additional wires to connect to have a luck to hear FM sound ? I’m a bit disappointed as I mainly ordered a X7 to enjoy this feature !
Edit : Ok there are some additional components and wires to solder :
http://krikzz.com/forum/index.php?topic=697.0
This is the info you're looking for (taken from another form post):
"I'm not 100% sure what side of the resistors the capacitor is supposed to be on, but it works the way I put in place below. Pin 1 on the Sega IC 315-5684 chip IS ground, and you connect that to the leg of the capacitor that needs grounding (or any other ground location on the board). Only the non-grounded leg of the capacitor should make contact with your path between the IC and cart pins.
Pin 24 Sega IC 315-5684 <-----> 47k resistor <-----> .022uf capacitor not grounded leg <----->
Cartridge Connector Pin 1
Pin 10 Sega IC 315-5684 <-----> 47k resistor <-----> .022uf capacitor not grounded leg <-----> Cartridge Connector Pin 3
Any ground location (I used one of the power supply legs) <---> grounded/other leg of .022uf capacitor #1 and capacitor #2
To reiterate from the original instructions: yes you do need to lift the legs of pins 24 and 10 on SEGA IC 315-5684 before you connect the wires or this won't work. I was able to do this by carefully applying heat with the iron while very gently pulling with an X-acto knife. In their natural state they are attached to ground, so they have to be not touching ground for them to work properly for the mod."
Other than that, I also have modified my Nomad to play SMS games and FM sound. So far the results are great even on the Nomad!! Even though I have a few original carts, this is just an excellent alternative to play those games just using Everdrive on a portable system, rather than go around with a tower of awful adapters
I also wantd to report some FM sound bugs I discovered so far. I'm not sure whether this is existent only on the Nomad but here is what I noticed:
-in Penguin Land, when the egg crashes, the sound is very loud (not sure if this is what it is supposed to be though)
-in Wonder Boy in Monster Land during Stage Clear and counting down hearts for bonus points, the sound disappears (according to the emulator, it should be just as loud all the time)
Please take a look at those reports. Thanks in advance