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From: | Phil Frost |
Subject: | How is size of kernel found? What exactly do the memory numbers mean? |
Date: | Thu, 24 Jan 2002 22:58:08 -0600 |
User-agent: | Mozilla/5.0 (X11; U; Linux i686; en-US; rv:0.9.7) Gecko/20011221 |
Also, I am unable to find the exact meaning of the mem_lower and mem_upper members of the multiboot info passed to the kernel in EBX. On a four meg system, 639KB lower and 3072KB of upper is reported. 3072+639=3711, 3.62MB. Where did the other 385KB go? Also, I have yet to see a system that did not have either 640KB or 512KB of lower RAM. While this could be a defective BIOS, I highly doubt it. Do these memory numbers indicate unused RAM, after the loading of modules, excluding the IDT, BIOS data areas, and all else? Or, do they specify something else?
Note: I'm not subscribed to the list, so please CC replies to me. Thanks, Phil Frost
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