198
Open
A
F
F
o
o
r
r
t
t
r
r
e
e
s
s
s
s
9
9
5
5
0
0
0
0
/
/
9
9
3
3
0
0
0
0
O
O
n
n
l
l
i
i
n
n
e
e
M
M
a
a
n
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u
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a
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Glo
ssar
y
&
T
e
c
hni
c
a
l s
u
pp
or
t
A
A
P
P
M
M
Unlike
ACPI
, BIOS controls most APM power management functions. AOpen Suspend to Hard
Drive is a good example of APM power management.
A
A
T
T
A
A
/
/
6
6
6
6
ATA/66 uses both rising edge and falling edge but doubles
UDMA/33
transfer rate. The data
transfer rate is 4 times of the PIO mode 4 or DMA mode 2, 16.6MB/s x4 = 66MB/s. To use ATA/66,
you need special ATA/66 IDE cable.
A
A
T
T
A
A
/
/
1
1
0
0
0
0
ATA/100 is a new IDE specification under developing. ATA/100 uses both rising edge and falling
edge as
ATA/66
but clock cycle time is reduced to 40ns. The data transfer rate is (1/40ns) x 2 bytes
x 2 = 100MB/s. To use ATA/100, you need special 80-wire IDE cable, the same as ATA/66.
