I find a bit difficult to find updated information about multi-region mods for the n64. I’ve seen mods with or without switches but I’m not sure of their advantages/disadvantages.
As far as I know if you would like to play all kind of original cartridges you would need the 3 consoles (PAL, USA and JAP) since there are some regional lock-outs that cause that not all USA games work in JAP consoles and vice versa, or you could also use a passport device (hard to find and requiring a boot cartridge).
Could you share any opinions about that kind of mod? Since it is not a common mod to see for example in ebay, are there any problems still to be solved?
N64 region free remains elusive. I know Otaku Store in France managed to pull it off, but I believe they used a CIC/lockout chip from a donor machine. Either way, they never made their mod public so it’d be a case of buying one from them and reverse engineering it, if anyone fancies doing that? 🙂
Another problem is that the PAL N64 is quite far out of spec when forced into NTSC and this can upset some TVs.