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I bought a Japanese DC on ebay earlier. It is from Japan so it is NTSC-J. I am unsure if NTSC-J Dreamcasts can safely plug into a UK / IE socket (I live in Ireland but we use the same electric voltage as England iirc which is 230V)
Idk how to get a UK or Ireland PSU and I also want to get a BIOS chip so I can play back-ups & games from every region.
I seen the back of a JP DC which says it's 120V even though google says Japan's V is 100.
Does anyone know if it'd be safe to plug a Japan DC in? Would it blow up? Where can I get the PSU and BIOS chip?

Thanks in advance!
-JJ

You can either buy a replacement PSU for PAL models and simply swap it out, or getting a stepdown converter. They are changeable regardless of region. For bios you can do this mod.

https://mmmonkey.co.uk/sega-dreamcast-region-free-bios/

Japanese cake made a really nice bios where he added new options in the dreamcast dashboard as well.

https://youtu.be/4XgDiZLqEP0