[A83] Re: Randomization - r register
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[A83] Re: Randomization - r register
At 00:03 2001-12-12, you wrote:
>Normally memory is build out of flip-flops:
>tiny pieces of logic that can remember a value (1 or 0)
>
>In the early days of computing, however, people tended to safe every penny on
>hardware logic, since it was quite expensive, so another way of memory was
>invented: dynamic memory.
Its not only in the old days. Almost all ram memory today is dynamic.
(dram) It is only cache and small amounts of ram, like the ones in the
calcs and probably some handhelds that is static ram. (sram)
Static ram is still much much more expensive then dynamic, and take up much
more chipspace.
static ram is though possible to make much faster, thats why it is used in
cache. It is also possible to make less powerconsuming, since you don't
have to reload the caps all the time, this is why it is used in handhelds.
In sdram used today the s does not mean static, it means syncronous,
meaning it can transfer blocks of ram with only one request, speeding it up
quite a bit. (the d means dynamic)
//Olle
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