boot.s oddity

[NWPlayer123]

I've just started my own probing into the IPL, are you sure this is right? I have the NTSC 1.0 ver afaik, might genuinely be different
Also, the stuff before about running it twice on L191 might actually be a mistake, should check later versions if poss.
https://github.com/ogamespec/gc-ipl/blob/master/Bootstrap/boot.s#L354-L355