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Those metal tabs on SNES games with addon chips

Oct 23, 2014 at 9:50:31 AM
DoctorEss (2)

< Crack Trooper >
Posts: 174 - Joined: 10/05/2012
United States
How actually important are these?  I've wondered for most of my life, and it popped back into mind recently because I noticed most of my SNES titles that have addon chips are missing one, if not both, of the metal tabs in the cart slot.

Just curious if I should bother getting ones from broken carts and transplanting them or not.

Oct 23, 2014 at 10:28:36 AM
sazyario (73)

< Meka Chicken >
Posts: 802 - Joined: 05/12/2013
Metal tabs?

Do you mean the extra set of 8 pins on each side of the cartridge in super fx games?

Oct 23, 2014 at 10:40:57 AM
DrAfrokid (63)
(Mario Caruffo) < Meka Chicken >
Posts: 795 - Joined: 05/01/2013
I´m always wondering the same , hope somebody can give a documented answer about this.
I think is just for grounding.

You can check the metal tab in the lower super famicom cart:

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Edited: 10/23/2014 at 10:41 AM by DrAfrokid

Oct 23, 2014 at 10:43:42 AM
Viktor_Zukov (51)
(Chris ) < Eggplant Wizard >
Posts: 481 - Joined: 10/10/2014
I heard on a youtube video that the SFCs use the metal tab for grounding. But it is youtube, so not exactly 100% credible...

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Oct 23, 2014 at 2:50:16 PM
captmorgandrinker (548)
(Throw apples at NESDJ) < Bonk >
Posts: 15627 - Joined: 08/17/2009
Originally posted by: sazyario

Metal tabs?

Do you mean the extra set of 8 pins on each side of the cartridge in super fx games?

There's a metal squeeze pin looking thingy in the plastic of those cases.

Also, I've only seen one (even though there's room for 2) in any of those games I've ever opened.

Oct 23, 2014 at 4:49:57 PM
NintendoGoon (20)
< Eggplant Wizard >
Posts: 337 - Joined: 08/20/2013
North Carolina
IIRC Super Mario RPG has this tab. Not so sure about any other games though.


Oct 23, 2014 at 5:30:43 PM
bigdawg8412 (28)
(G P) < Eggplant Wizard >
Posts: 427 - Joined: 06/27/2012
United States
Most of the games I've seen that use the metal tabs are missing at least one of the tabs.

Oct 23, 2014 at 5:40:43 PM
Guntz (115)
< Master Higgins >
Posts: 8279 - Joined: 05/07/2011
Yeah I've only ever seen one spring tab on co-processor games. It's for extra grounding, that's all. The SNES cart slot almost always has a metal cover around it, which touches the spring tab in the cartridge shell and adds extra stability to the added hardware. The N64 would go one step further and encase cartridge boards in an RF shield cage which would also contact with the cart slot.

Oct 23, 2014 at 5:41:25 PM
daillest (218)
(Joe ) < El Ripper >
Posts: 1421 - Joined: 03/20/2012
Star Fox uses 1. They are grounding clips. At least that is what I would call them


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