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ATX Main board
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1.8.2.14 Primary EIDE Connector (PRI_EIDE)
The onboard IDE connector is for the 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.
Drive jumper setting Mode of device(s) Cable connector
Single device Cable-select or Master - Black
Master Black
Cable-select
Slave Gray
Master Master
Two devices
Slave Slave
Black or Gray
z 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.
z Use the 80-conductor IDE cable for Ultra DMA 133/100/66 IDE
devices.
If any device jumper is set as “Cable-Select,” make sure all other
device jumpers have the same setting
z Orient the red markings (usually zigzag) on the IDE cable to Pin
1.