> 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").
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