U.S.
Patent
Apr.
13,
2004
Sheet
6
6f
16
US
6,721,489
B1
load
boot
program
~
542
v
-
request firmware
F
'9
'
8
-
~
548
version
V
receive
?rmware
N
550
}
version
request
new
firmware
~
554
552
‘
receive
new
firmware
~
556
t
is
there
an
update?
no
decrypt
and
store
new
firmware
~
558
V
receive
flag
N
570
572
cartridge
yes
change‘?
v
.
.
send
list
1,
track
1
send
previous
location
~
574
and
0
Seconds
~
576
execute
state
machine
~
578
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