3-6 Chapter 3: Motherboard info
3. IDEconnector(40-1pinPRI_IDE)
The onboard IDE connector is for the Ultra DMA 133/100 signal cable. There
are three connectors on each Ultra DMA 133/100 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.
• 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 IDE devices.
If any device jumper is set as “Cable-Select,” ensure that all other device
jumpers have the same setting.
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
PRI_IDE
NOTE:Orient the red markings
on the IDE ribbon cable to PIN 1.
PIN1
M4A78LT-M LE
M4A78LT-M LE IDE connector
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