In article , "Tarver Engineering"
wrote:

"Felger Carbon" wrote in message
link.net...
"Harry Andreas" wrote in message
...
In article , John Cook
wrote:


Just the official reports!!, Lockheed has only purchased enough
processors for 155 F-22's because there out of production, the
demand
for Air to ground operations has increased the demand on
processing
power, something the original processors are not quite upto hence
the
_need_ for the 'upgrade'.

So the processors are obsolete, (too old)... the Avionic
architecture
needs to be replaced before the F-22 can become the F/A-22 because
the
present system is based on the old processors and rewriting the
code
is pointless on an obsolete system, that would only support half
of
the F-22 fleet

Methinks there's some confusion there between processors, avionics
architecture, and software.
While it's true that Intel tried to shut down i960 production
causing a
chinese fire drill, there are enough assets to get by until a new
processor is
ready.

Full disclosu I'm a retired electrical engineer. I specialized in
high-end embedded microprocessors, which the "i960" in the F-22 is. I
know nothing about designing aircraft. I do know a little about the
Intel processor at the heart of the F-22:

The i960MX was designed by Intel specifically and solely for the F-22.

Nope, the i960 is a processor designed to control printers.

There were several flavors of the i960, most of which were purely
commercial and were used as printer drivers among other things.
The MX was the military version that had the 33rd bit for security, which
was unique among the other processors and is one of the reasons the
i960 was selected in the first place.

(rest of off-topic stuff snipped)

--
Harry Andreas
Engineering raconteur