N64d (v0.2) - Jap<=>USA cart conversion guide
N64 Jap<=>USA Conversion Info
Compiled by LeatherWing of Denary Notation
Source: Various mags and www docs.
Q: What am I reading?
A: This doc will attempt to show you how to convert your N64 system so it will accept both Japanese and USA-style cartridges. As usual, we take NO RESPONSIBILITY for anything going wrong or for any damage that might occur to your N64 (or to yourself for that matter...). Remember, folks, tampering with your system voids your warranty.
Q: How do I get "foreign" carts into my N64 cartridge port?
Inside the N64 cart slot there are two plastic tabs (located on either side of the cart connector). These tabs slot into grooves located on the back of your game cartridge - these grooves are at varying distances apart depending on the cartridge's origin. Therefore to get a USA cart to fit into a Jap port (or vice-versa) you need to remove the tabs.
Q: Okay! Now where did I put that sledgehammer...?
A: Er, not so fast! The tabs are physically part of a plastic component screwed into the N64's casing. To remove the component, you're gonna have to go inside!
Opening up your N64 is unlikely to do it damage (unless you start poking around in unwarranted places) - but to do so, the hexagonal screws holding the casing together will have to be removed.
For this, you'll need a specialised screwdriver. You're on your own on this count, I'm afraid. Try contacting your local hardware specialists; although they're unlikely to have one in stock, they may be able to point you in the direction of someone in the know.
Okay. You got your screwdriver, now well... unscrew the screws and remove the casing. Careful how you go one this one, the N64 RAM pack is joined to the internal motherboard, so you may have to ease them apart (it won't do any damage).
Once open, located the plastic component, unscrew it (an ordinary Phillips screwdriver should suffice) and remove it.
Now it's just a case of slotting the machine back together again. Ensure the RAM pack slots back into the m/board as before. If everything fits tightly, then you've got a well-modified N64! If, however, you can't get the machine back in one piece well, hey! You now have a novelty door stop combo or an attractive pair of bookends. Have fun!
Note: One component that might not fit nicely back in place is the dust flap(s). This is because they were reliant on the component you removed for security. Nothing you can do except remove them and use some DIY method of protecting your port from dust and dirt. IMO a cartridge in the slot is by far the best method :)
Document ends
Part of the N64d compilation of Nintendo64 documents.
1997 Denary Notation