Messages in this thread | | | Subject | Re: Walking all the physical memory in an x86 system | From | Alan Cox <> | Date | Tue, 30 Nov 2004 20:28:06 +0000 |
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On Maw, 2004-11-30 at 20:46, Jan Engelhardt wrote: > I want(ed) to find out which I/O port to use for inb() and stuff, and using the > BIOS's provided data. If you are referring to "ports", I could not find a > device node, but "port" maybe:
I didn't know that was in the BIOS page.
> Oh, look what /dev/mem found! (I retried haha)
> So, /dev/mem points to "physical" mem in a sense like DOS has. (Where, the > BIOS, is blend into, as you can see)
The kernel also preserves the low 4K because some apps, APM and the like turned out to need it.
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