[filmscanners] RE: Digital Darkroom Computer Builders?

["Austin Franklin" <darkroom@ix.netcom.com>]

Hi David,

> 'Doze, Anthony's claim that
> handling more memory than an individual instruction can access is both
> innefficient and difficult is wrong on both counts. Accessing the whole of
> the address space from every instruction is hideously inefficient. Most
> machines provide modes where a base register plus a short offset field in
> the instruction is used. This is much more efficient than including the
> whole address in every instruction. At which point, the size of the base
> register is the only limit on program address space.

Correct, AND depending on addressing mode, it could be a relative address,
so it could be anywhere in any space.  AND...no user process (on Windows NT
architecture OSs anyway) addresses memory directly, it has to go through a
logical to physical translation process.

Austin

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