Help with Supergrafx/Duo-R cables? it's urgent :(

[playfortoday]

Hi everyone,
i might buy a SUPERGRAFX locally today, but i can't test it before buying because the guy doesn't have the cables. I have a Duo-R, are the AV and power cables the same? (If it helps, i live in europe)

THANKS!

ps: what kind of psu is needed if it's not the same? sometimes the nes/snes/md can work with other consoles...

[Cornelius]

My ac adapter is 9v 800 mA, center negative. It is the original NEC adapter

[playfortoday]

thanks, i found out that they are different.