Asus DiGiMatrix - Manual (Page 114)

4-10 Chapter 4: Motherboard Info
3. IDE connectors (40-1 pin PRI_IDE, SEC_IDE)
The PRI_IDE connector is for the UltraATA133 IDE hard disk ribbon
cable. Connect the cable’s blue connector to the IDE connector, then
connect the gray connector to a slave device (optical drive) and the
black connector to the UltraATA133 master device (hard disk drive).
Refer to the hard disk documentation for the jumper settings.
• Pin 20 on the IDE connector is removed to match the covered hole on
the UltraATA cable connector. This prevents incorrect orientation when
you connect the cables.
• For UltraATA133 IDE devices, use an 80-conductor IDE cable.
P4SQ
P4SQ IDE Connectors
PIN 1
PRI_IDE
NOTE: Orient the red markings
(usually zigzag) on the IDE
ribbon cable to PIN 1.
PIN 1
SEC_IDE
The SEC_IDE connector connects the optional DiGiMatrix
Subsystem. The DiGiMatrix Subsystem is designed to provide
additional storage, and a second optical drive. Refer to page A-2.
The DiGiMatrix Subsystem is purchased separately.
DiGiMatrix Subsystem