Interesting Hardware Question

[acontrasto]

In my research to determine whether I should upgrade my Sprint Vogue (PPC 6800) to the Sprint Touch Pro, I came across some interesting information at phonearena.com. I found that the Touch Pro has something called "Integrated System Memory" along with the standard ROM and RAM.

This is what phonearena shows on their site:


I knew, up until now, that RAM is volatile, fast, memory that applications and other data are loaded into from ROM which is non-volatile permanent memory where data is stored. What I want to know is this, what is "Integrated System Memory" or ISM as it is referred to at phonearena?

The only thing I can imagine it to be is memory that is integrated directly on the chip that contains the processor, similar to L1 cache on PC processors.

If this were the case, what would the ISM be used for as opposed to RAM, and would 32MB be sufficient?

What do you think?

What is an explicit definition and use of "Integrated System Memory?"