American Megatrends MegaDual User Manual page 34

Step 9 Connect I/O,
JP8 Secondary IDE Controller JP8, the secondary IDE connector, is a 40-pin dual-inline berg that connects
the secondary primary and slave IDE drives to the secondary onboard IDE controller.
Attach the secondary master and slave IDE drives to JP8 via a standard 40-pin IDE cable
as shown on page 25.
Ultra DMA 4/ATA66 Drives on the Secondary Channel AMI MegaDual ships with two 80-pin IDE cables.
Although the cable is 80-pin, the connectors are still 40-pin.
80-pin cables are required to support UDMA-4/ATA66 IDE drives.
AMIBIOS automatically detects the cable type and drive type so that it can enable the
fastest IDE mode possible.
Secondary
Cable Type
40-pin
80-pin
80-pin
80-pin
80-pin
28 MegaDual PCI Motherboard User's Guide
Continued
Secondary
Master
N/A
UDMA-4
UDMA-4
UDMA-2
UDMA-2
Secondary Result
Slave
N/A Highest
possible
mode is
UDMA-2 or
ATA33.
UDMA-4 Master/slave
are both set
to UDMA-4.
UDMA-2 Master is set
to UDMA-4.
Slave is set to
UDMA-2.
UDMA-4 Master is set
to UDMA-2.
Slave is set to
UDMA-4.
UDMA-2 Master is set
to UDMA-2.
Slave is set to
UDMA-2.
Cont'd