[c-nsp] ios upgrade to SXI3

[Jeff Bacon]

> Cisco doesn't appear to have the engineering resources and/or
> will-power to move IOS into the 20th Century (pre-emptive multitasking
> with memory and process containment.) It is more beneficial for them
> to sell you new products with "better" versions of IOS.
> 
> Tim:>

That's not really surprising. I'm not even sure it's a great idea to
try, really. IOS is what it is, a coop-multitasking self-mem-managing
embedded OS that operates under various sets of assumptions about how
its world works (e.g. being able to scribble all over itself). There are
God knows how many code branches managed by how many groups running on
all manner of hardware, and some of that hardware uses multiple
processors and dedicated ASICs. I'd argue that at least some of the
hardware doesn't even have the resources to be running a pre-emptive
virtual-memory OS. 

Somehow the idea that they are going to ease this into being a modular
OS just doesn't fly. Spend the effort on something useful, like making
sense of the code base or quality control.