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4.
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 signal cable: blue, black, and gray.
Connect the blue connector to the motherboard's IDE connector, then select one of the
following modes to configure your device(s).
Single device
Two devices
• Pin 20 on the IDE connector is removed to match the covered hole on the Ultra DMA
• 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.
M3N78-CM
5.
Optical drive audio in connector (4-pin CD)
This connector allows you to receive stereo audio input from sound sources such as a
CD-ROM, TV tuner, or MPEG card.
M3N78-CM Internal Audio Connector
1-20
Drive jumper setting
Cable-Select or Master
Cable-Select
cable connector. This prevents incorrect insertion when you connect the IDE cable.
R
M3N78-CM
IDE Connector
R
M3N78-CM
Mode of device(s)
Master
Slave
CD
(black)
Cable connector
-
Black
Master
Black
Slave
Gray
Master
Black or gray
Slave
ASUS M3N78-CM
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