Are you talking about the argument passed to NSS:RebootSystem? Thinking of using regionfree to boot different titles?
0x00100180 activates rebootsystem and clears the FIRM permabuf. I think what you're looking for is 0x00000002, which is the game cart mediatype.Yeah, that.
Yeah, I can't figure it out.
I was already asking around at #3dsdev, and they said it would not be possible by simply editing this.