Saturday, February 04, 2006

System Boot

(1) bootstrap code is stored in firmware ROM and EPROM.
(2) bootstrap runs post test and run a bit code to read
a single block at a fix location (block 0, boot sector)
from disk into memory and begin it's execute the code
from boot block.
this code is very simple only lnow the addresas on disk
and length of reminder of the bootstrap program
(4) full bootstrap, it will traverse the file system to find
the OS kernel, load it into memory and start it's execution

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