20
A Guide to Building a PC with an AMD Athlon™ Processor
22914B/0—September 1999
Step 7.
Get Familiar with Your Drive Cable Connectors
In Step 8 you will install the drives in the case. Before you do that, you should become
familiar with the cables that are used with the various drives.
Photo 9 shows the logic cable that is plugged into the floppy disk drive. Notice that the
cable has a dark stripe on the right side. This stripe is usually red and it mates with
the pin 1 side of the cable connector on the floppy disk drive.
Photo 9. Pin 1 on Floppy Drive Connector
Photo 10 shows two cables that are the same except the bottom one has keys and the
top one doesn’t. You may get either type with your motherboard. If you have the keyed
type of cables, it will be very apparent where the cable can be plugged in. If you have
the unkeyed type of cable, you must depend on the pin 1 colored stripe to show you
how to match the cable to the cable connector.
Notice that in Photo 10 both cables have a red marking for the pin 1 side. The cable on
the bottom has a dashed stripe for pin 1.
Photo 11 shows a UDMA/66 (ATA-66) cable versus a regular IDE cable. The UDMA/66
cable is on top and it has much thinner wires to allow 80 wires in the cable. The cable
on the bottom has only 40 wires that are obviously thicker.
Photo 12 on page 22 shows a hard disk drive connector that uses a 40-pin connector.
Hard disk drive cables are connected to the drive with pin 1 (the red stripe) towards
the power connector. The arrow in Photo 12 shows the location of pin 1 on the
connector.
Pin 1
on drive
and cable