which version of the HERO is SECAM? How can I recognize which one I play (atarimania ROM)?
AFAIR SECAM and PAL systems have the same vertical frequency (50Hz) (NTSC has 60 Hz). In a nutshell from the perspective of us... players PAL = SECAM in the meaning of speed. Answering the second part of the question it depends on emulator which you are using. On Altirra look at aplication bar on top of screen and on Atari800Win Plus look at the bottom of screen. You'll see small icons... second from left is the answer. And one more thing most of Atari games can work / are compatible with all systems PAL/NTSC/SECAM. The system is not bind to ROMs but to real Atari computer and you can easily choose one of them in emulator.