Aaeon PCM-6896 Manual page 37

IDE Hard Drive Connectors (CN7)
If customers have (Neccessity) to use ATA-100 HDD and
ATA-33 CABLE you must alter two settings in the Award
BIOS. The two settings are IDE Primary Master UDMA and
IDE Primary Slave UDMA. Set these two functions as
disabled.
Primary IDE Hard Drive Connector (CN7)
You can attach up to three Enhanced Integrated Device Electronics
hard disk drives to the mainboard's internal controller. The main-
board's IDE controller uses a PCI local-bus interface. This advance
interface supports faster data transfer and allows the IDE hard
drive to exceed 528 MB.
Connecting the hard drive
Connecting drives, their done in a daisy-chain fashion and requires
one of the three cables, depending on the drive size. 1.8" and 2.5"
drives need one 44-pin to two 44-pin flat cable connector. 3.5"
drives use one 44-pin to two 40-pin connector.
Wire number 1 on the cable is normally red or blue, and the other
wires are usually gray.
1. Connect one end of the cable to CN7. Make sure that the red
(or blue) wire corresponds to pin 1 on the connector, which is
marked and connectors are slotted.
2. Plug the other end of the cable to the Enhanced IDE hard drive,
with pin 1 on the cable corresponding to pin 1 on the hard
drives. (see your hard drive's documentation for the location of
the connector).
Connect a second drive as described above.
Unlike floppy drives, IDE hard drives can be connected to either
end of the cable. The pin definitions for this section are listed on
the next page.