User Guide

35
A
A
K
K
7
7
9
9
G
G
-
-
V
V
/
/
A
A
K
K
7
7
9
9
G
G
-
-
V
V
N
N
/
/
A
A
K
K
7
7
9
9
D
D
-
-
1
1
3
3
9
9
4
4
/
/
A
A
K
K
7
7
9
9
G
G
-
-
1
1
3
3
9
9
4
4
O
O
n
n
l
l
i
i
n
n
e
e
M
M
a
a
n
n
u
u
a
a
l
l
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 diagram.
2. To achieve the best
performance of Ultra
DMA 66/100/133 hard
disks, a special 80-wires
IDE cable for Ultra DMA
66/100/133 is required.
IDE1 is also known as the primary channel and IDE2 as the 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 ATA66
, ATA100 or ATA133 DE 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 Tim
e
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
ATA33 30ns 4 120ns (1/120ns) x 2byte x 2 = 33MB/s
ATA66 30ns 2 60ns (1/60ns) x 2byte x 2 = 66MB/s
ATA100 20ns 2 40ns (1/40ns) x 2byte x 2 = 100MB/s
ATA133 15ns 2 30ns (1/30ns) x 2byte x 2 = 133MB/s
Warning: The specification of the IDE cable is a maximum of 46cm (18 inches);
make sure your cable does not exceed this length.