Calculating Memory Amount

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Hi!

I am examining the way Linux calculate memory amount. In Linux-2.2.14 or 16,
int15-E801 and eax-ebx was used. (2.2.x because I have "Understanding the
Linux Kernel" book.) In 2.4.19 after int15-E820, int15-E801 and ecx-edx are
being used and there, being said that some bioses dont place correct
results in eax-ebx so ecx-edx is used. My bios(Award6.0) also supports
latter case that is
ecx-edx but my 2.2.14 kernel boots correctly (I have got 256 MB ram so
int15-ah = 88 is not enough). That's this point i dont
understand. How does Linux correctly calculate memory amount in 2.2.14
kernel although my bios doesnt support the Linux's way?

Sory for my bad English.

Regards
Bora Sahin

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