U.S.
Patent
Apr.
13,
2004
Sheet
7
0f
16
US
6,721,489
B1
receive
request
for
firmware
version
i
read
firmware
version
from
disk
i
send
firmware
version
to
controller
~
722
~
724
~
726
728
yes
request
for
update?
read
firmware
from
disk
~
740
i
send
firmware
to
I
1
O
contioller
program
glue
logic
~
744
~
742
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