Re: Instruction And Data memory

On Sat, 21 May 2005 01:20:11 +0000, Fred Bloggs wrote:

>
>
>
>>
>> It is a strange, if off-topic, observation that von Neumann made modern
>> computing possible by bridging the gap between instructions and data,
>> but modern computing does everything to make them as clearly distinct
>> as possible.
>
> It had nothing to do with modern computing

I think the reference was to the Von Neumann processors now trying to
isolate instructions and data as much as possible. Seperate I and D
caches certtainly suggest this, as do Icaches without write ports. The NX
bit in the page table is another move along this line.

> - both architectures were
> proposals for the most efficient implementation of a relay logic
> computing machine to be used to generate Navy gun tables during WWII.
> Von Neumann won. Interesting that it became Von Neumann vs Harvard
> instead of Princeton vs Harvard.

I've heard both.

>The integrated circuit technology made "modern computing" *possible*-
>before that they were impossibly large and power hungry behemoths.

....and now we have impossibly small and power hungry behemoths. ;-)

--
Keith


.

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