Re: Large RAM sizes in embedded systems


"larwe" <zwsdotcom@xxxxxxxxx> wrote in message
news:1167179126.802707.294100@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Paul Carpenter wrote:

on a nominally 740GB data set. The nature of the data and the required

Ah the BMF[1] data set scenario that relates to many embedded apps.

Sarcasm? :)

computer modules that can address 1TB. I've found mention of server

Unless you can find something for a 64 bit physical address bus, I doubt
you will find anything that is not limited to the 32bit physical address.

I haven't really found anything COTS. However, 4GB DIMMs are readily
available - and sold in pairs, yet - so clearly SOMETHING must be
capable of addressing more than a mere 32-bit address space.

It's an SDRAM, accessed via a row-column mechanism.

You don't use all 32 bits for each half and with the correct
decode hardware it could be accessed using two instructions
rather than one.

Isn't this the key to the solution you are seeking?

tim



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