[REBOL] Re: On mutability and sameness
From: joel:neely:fedex at: 13-Jun-2001 11:30
Hi, Chris,
Chris wrote:
> Joel Neely wrote:
>
> > "Referrable" "Non-referrable"
> >
> > Immutable ROM data, output CPU status data (hardware
> > registers of ID on some CPUs), overflow
> > some memory-mapped bits, etc.
> > controllers
>
> I'd disagree with the overflow bits etc - on some CPUs (certainly
> ARM, I think PPC) it is possible to not only directly view the
> status registers but to alter the state of the bits they contain
> under program control (not as side-effects of other instructions,
> but directly).
>
I mis-parenthesized... I meant the "some CPUs" to qualify all of
the various examples since (as you pointed out) it varies across
different architectures.
> Just playing devil's advocate ;)))
>
By all means, play away!
-jn-
--
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\/ 2 + \/ 2 = 4 (for sufficiently large approximations of \/ 2 )
joel'dot'neely'at'fedex'dot'com
