Hi! I'm back playing with my Neo Myth MD, and I got strange behaviour with my Sega CDX.
When I insert my setup (Slimloader IV + NEO3SD + MD Menu 2.9b3 + SD Card) in my Sega CDX for a first time, I can choose my game and play it normally. But most times when I press reset in the console or turn off/on, after the "Produced by or under license from Sega Enterprises LTD." it shows a black screen, while the Slimloader led keeps red. Then I need to take the cartridge off the console, wait a few seconds and then re-insert it, and it will boot normally. The detail is that it won't save my last SRAM session, and I will lose save data. Sometimes the Slimloader will hang after pressing reset when the game is running (sometimes freezing the game).
The Slimloader works fine in my Genesis Models 1 and 2, it's just a CDX issue, without losing any data. I've done a lot of tests and it didn't fail in these systems.
I got 2 Sega CDX units, and it presents the same behaviour on both, with diferent power supplies (original ones).
Please help again when possible. Thanks!
EDIT: Simple way to test: Sonic The Hedgehog 3 [!].gen - verified rom. Trying to load this rom starting the game in any save slot and then reseting for 2 or 3 times should cause the issue (all the slots become blank). Tried it with SAVE RAM Manager On and Off, with Return to Game option set (yet the Return to Menu also gives the same problem). 64Kb of SRAM set in MD Menu.