Posted July 22, 2016
samwisegamgees: If I remember right the turbo button was for machines with DX processors and the turbo button turned the maths co-processor on and off.
brouer: I don't want to discount the possibility of some vendor having implemented something like that, but I never came across such a button, and I've worked on a lot of different PC brands. The turbo buttons were always linked to clock frequency.
My PC 20-III didn't have a button, but you could set the frequency by software.
I also remember atslow.exe and similar.