Real mode switch hooks ??

K Arun Kumar ziconium03 at
Sun Sep 23 09:41:06 EDT 2012

     I was looking at the x86 boot code - I found this -
"boot_params.hdr.realmode"_swtch. why are these real mode 
switch hooks required ? Is this any boot param passed to 
the kernel cmd line ? Any pointers to read more about this ??


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