Later on in the linked thread, the original poster seems to indicate that it doesn't appear to be the same emulator - or at least that the big chunk of code for the controller mapping isn't retained in Donkey Kong 64.

Perhaps they did a quick port or trimmed the emulator to fit the requirements of that specific game.

I remember a friend being excited before Donkey Kong 64's release because he'd heard about the Jetpac sub-game - I wonder if he already had Goldeneye...

I just felt old on realising that the N64, which I remember reading previews of in Edge magazine, is as old now as the 48k Spectrum (treasured artefact of my childhood) was when the N64 came out. It helps a little that I didn't see an N64 in action until 3 years after its Japanese release.

The N64 is actually the only console I've ever played... I had a Commodore 64 and then Amiga all they way through the "early console years", and only played some N64 stuff because a house mate bought one.

Then I sort of fell out of gaming apart from a bit of simulation and strategy games... Getting tempted again these days when I see how far they've gotten. With a young son taking up my time I suspect it'll be him that'll be the excuse...