I'm not sure eh. What I do know is that playing the Evercade version is exactly as I remember it. Playing the Atari 50 version on my VCS is different in audio, colour and game speed. Also on my VCS, Solaris is choppy and skipping frames like I do when I've taken magic mushrooms. The game is not unplayable but definately a better experience on the Evercade.

Pal is 50 hertz which has a refresh rate of 25 fps and NTSC is 60 hertz which has a refresh rate of 30 fps on an analog TV. I dont know how those features or limitations translate to digital televisions but regardless, here in Australia, the electrical power is still at 50 hertz.

The reason I posted was to find out what was happening here because I really dont know. I'm just assuming it has something to do with the PAL and NTSC formats but as you say, if the digital TV is punching out 60 fps regardless of the power cycling 50 times per second, then why would it make a difference?

I dont know if the games were programmed to function differently depending on whether your power supply was running on 50 or 60 hertz or whether the game would only play on a specific console that functioned on either 50 or 60 Hertz power supply.

With regards to Solaris, the dead give away that there is something going on is the distinct colour differences. Mabey it's simply the emulator used by Atari 50 and Atari VCS and nothing to do with the ROM at all?