15 PCA-6781 User Manual
Chapter 2 Installation
2.10.1 Connecting the floppy drive
1. Plug the 34-pin flat-cable connector into CN2. Make sure that the red wire corre-
sponds to pin one on the connector.
2. Attach the appropriate connector on the other end of the cable to the floppy
drive(s). You can use only one connector in the set. The set on the end (after the
twist in the cable) connects to the A: drive.
3. If you are connecting a 5.25” floppy drive, line up the slot in the printed circuit
board with the blocked-off part of the cable connector.
If you are connecting a 3.5” floppy drive, you may have trouble determining which pin
is number one. Look for a number printed on the circuit board indicating pin number
one. In addition, the connector on the floppy drive may have a slot. When the slot is
up, pin number one should be on the right. Check the documentation that came with
the drive for more information.
In case you need to make your own cable, you can find the pin assignments for the
board’s connector in Appendix B.
2.11 IDE Connector (CN4)
The PCA-6781 provides one IDE channels to which you can attach up to two
Enhanced Integrated Device Electronics hard disk drives or CDROM to the PCA-
6781’s internal controller. The PCA-6781's IDE controller uses a PCI interface. This
advanced IDE controller supports faster data transfer, PIO Mode 3 or Mode 4, UDMA
33/66/100 mode.
2.11.1 Connecting the hard drive
Connecting drives is done in a daisy-chain fashion. It requires one of two cables (not
included in this package), depending on the drive size. 1.8" and 2.5" drives need a 1
x 44-pin to 2 x 44-pin flat-cable connector. 3.5" drives use a 1 x 44-pin to 2 x 40-pin
connector.
Wire number 1 on the cable is red or blue, and the other wires are gray.
1. Connect one end of the cable to CN4. Make sure that the red (or blue) wire cor-
responds to pin 1 on the connector, which is labeled on the board (on the right
side).
2. Plug the other end of the cable into the Enhanced IDE hard drive, with pin 1 on
the cable corresponding to pin 1 on the hard drive. (See your hard drive’s docu-
mentation for the location of the connector.)
If desired, connect a second drive as described above.
Unlike floppy drives, IDE hard drives can connect to either end of the cable. If you
install two drives, you will need to set one as the master and one as the slave by
using jumpers on the drives. If you install only one drive, set it as the master.
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