Specifications

M
M
X
X
3
3
W
W
-
-
E
E
3
3
/
/
M
M
X
X
3
3
W
W
-
-
V
V
3
3
O
O
n
n
l
l
i
i
n
n
e
e
M
M
a
a
n
n
u
u
a
a
l
l
IDE1 is also known as a primary channel and IDE2 as secondary channel. Each channel supports two IDE devices that make a
total of four devices. In order to work together, the two devices on each channel must be set differently to Master and Slave
mode. Either one can be the hard disk or the CDROM. The setting as master or slave mode depends on the jumper on your IDE
device, so please refer to your hard disk and CDROM manual accordingly.
This motherboard supports ATA33
, ATA66 or ATA100 IDE devices. Following table lists the transfer rate of IDE PIO and DMA
modes. The IDE bus is 16-bit, which means every transfer is two bytes.
Mode Clock Period Clock
Count
Cycle Time Data Transfer Rate
PIO mode 0 30ns 20 600ns (1/600ns) x 2byte = 3.3MB/s
PIO mode 1 30ns 13 383ns (1/383ns) x 2byte = 5.2MB/s
PIO mode 2 30ns 8 240ns (1/240ns) x 2byte = 8.3MB/s
PIO mode 3 30ns 6 180ns (1/180ns) x 2byte = 11.1MB/s
PIO mode 4 30ns 4 120ns (1/120ns) x 2byte = 16.6MB/s
DMA mode 0 30ns 16 480ns (1/480ns) x 2byte = 4.16MB/s
DMA mode 1 30ns 5 150ns (1/150ns) x 2byte = 13.3MB/s
DMA mode 2 30ns 4 120ns (1/120ns) x 2byte = 16.6MB/s
UDMA 33 30ns 4 120ns (1/120ns) x 2byte x2 = 33MB/s
UDMA 66 30ns 2 60ns (1/60ns) x 2byte x2 = 66MB/s
UDMA100 20ns 2 40ns (1/40ns) x 2byte x2 = 100MB/s
38
Tip:
1. For better signal quality,
it is recommended to set
the far end side device
to master mode and
follow the suggested
sequence to install your
new device. Please refer
to above diagra m
2. To achieve the best
performance of Ultra
DMA 66/100 hard disks,
a special 80-wires IDE
cable for Ultra DMA
66/
1
00
i
s
r
equ
ir
ed
.
Warning: The specification of the IDE cable is a maximum of 46cm
(18 inches); make sure your cable does not exceed this length.