Missing 1GB RAM, where is it?

[Andrzej Kardas]

On 14.04.2011 17:09, Adrian Cornish wrote:
> Just a thought - lower end graphic cards use system RAM as their own
> dont they
You right, devices like graphic card, ethernet cards etc. are mapped 
into memory, what cause some amount RAM is not available for system use. 
But as i've wrote before, i'm wondering why addresses in /proc/iomem 
(where the map of memory is) are not contiguous. I think, there should 
be info about what region of memory is mapped where (BIOS, PCI bus, for 
system use etc)*for whole 4GB *(Am I right??) address space (for 32bit 
OS). Instead of that, there are small "holes" in addresses and the total 
size of this holes (in my case) is about 400MB. So i wonder where that 
memory is.
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