1-26 Chapter 1: Product introduction
2. IDE connector (40-1 pin PRI_IDE)
The onboard IDE connector is for Ultra DMA 133/100/66 signal cable. There
are three connectors on each Ultra DMA 133 / 100 / 66 / 33 signal cable:
blue, black, and gray. Connect the blue connector to the motherboard’s IDE
connector, then select one of the following modes to congure your device(s).
• Pin 20 on the IDE connector is removed to match the covered hole on the
Ultra DMA cable connector. This prevents incorrect insertion when you
connect the IDE cable.
• Use the 80-conductor IDE cable for Ultra DMA 133/100/66 IDE devices.
If any device jumper is set as “Cable-Select”, ensure that all other device
jumpers have the same setting.
R
M3N78
M3N78 IDE Connector
NOTE: Orient the red markings
(usually zigzag) on the ID
ribbon cable to PIN 1.
PRI_IDE
PIN1
Drive jumper setting
Mode of
device(s)
Cable connector
Single device Cable-Select or Master - Black
Two devices
Cable-Select
Master Black
Slave Gray
Master Master
Black or gray
Slave Slave
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