> What you're talking about is called "hooking" and is much older than the Amiga. It's also
the technique used to create background programs in MS DOS
Indeed, DOS itself does it to the BIOS.
However, as the allusion to seizing all processors in a system illustrates, that bit probably
isn't the interesting bit of the patent; on the other hand, whilst SMP may not have been a big
concern for the PDP-11, DEC does hold quite a lot of prior art around the whole subject of
SMP, thanks to the PDP-10 series; if a technique was used on the '11, chances are it was
worked out on the '10.
And of course, the developer of NT would know about that, given his history (even if the '10
team did disdain him for his "small system thinking").