User Guide

M
M
X
X
4
4
6
6
L
L
S
S
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 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 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.
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/
1
00
/
1
33
i
s
r
equ
ir
ed
.
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
ATA 33 30ns 4 120ns (1/120ns) x 2byte x2 = 33MB/s
ATA 66 30ns 2 60ns (1/60ns) x 2byte x2 = 66MB/s
ATA100 20ns 2 40ns (1/40ns) x 2byte x2 = 100MB/s
ATA133 15ns 2 30ns (1/30ns) x 2byte x 2 = 133MB/s
33
Warning: The specification of the IDE cable is a maximum of 46cm (18 inches);
make sure your cable does not exceed this length.