Region Lock disable - Is a switch required?

[mamejay]

Hey guys,

I did a region mod on a JAP supergfx for a mate of mine.  He got a pre-made PCB.
Got it installed and its working great.  I disabled the lockout pin by grounding pin 29.

My mate is insisting that there needs to be a switch to enable the lockout for some of the JAP games.
Is this correct?  I cannot find any information about and all my tests at home with about 20 hu-cards worked perfectly.
If it is correct does anyone have a list of games that require it?
Thanks

[Duo_R]

I think just a certain supergrafx game checks.

[BlueBMW]

I've heard of that issue, though I've never experienced it myself.  The solution would be to just use a DPDT switch and use the second half of the switch to connect or ground the pin 29.  Kind of a pain, but might be necessary for that one SGX game

[mamejay]

Cool.  Will replace the SPDT with a DPDT switch and add the pin 29 and GND to the other legs of the US/JAP of the switch.

[SignOfZeta]

I think there is like...one specific game that fucks up on one specific hardware config. Personally I've never run into problems with just permanently grounding it.

[nat]

It's Aldynes. Aldynes breaks if pin 29 is grounded.

[SignOfZeta]

But wasn't it even weirder than that? Like, it only breaks it if you have a SuperCDROM2 attached to your SGX?

Either way, one SGX game so...it only matters if you have a SGX.

[Keith Courage]

I heard there was some issue with space harrier and pin 29 on a super grafx before as well. Can anyone else confirm this?