Acer 486 Specifications download pdf (Page 23)

Chapter 3 Connecting peripherals 15

Floppy drive connections

You can attach up to two floppy disk drives to the PCA-6143P's

on-board controller. You can use any combination of 5.25"

(360 KB and 1.2 MB) and/or 3.5" (720 KB and 1.44 MB) drives.

The card comes with a 34-pin daisy-chain drive connector cable.

On one end of the cable is a 34-pin flat-cable connector. On the

other end are two sets of floppy disk drive connectors. Each set

consists of a 34-pin flat-cable connector (usually used for 3.5"

drives) and a printed-circuit-board connector (usually used for

5.25" drives). You can use only one connector in each set. The set

on the end (after the twist in the cable) connects to the A: floppy.

The set in the middle connects to the B: floppy.

Attach the single 34-pin flat-cable connector to CN2 on the CPU

card. For help finding the connector, see Chapter 1 (page 5). Wire

number 1 on the cable is red or blue, the other wires are gray.

Make sure that the red wire corresponds to pin one on the

connector (on the right side).

Connect the A: floppy drive to the connector set on the other end

of the cable. If you are connecting a 5.25" floppy drive, line up the

slot in the printed-circuit-board (golden fingers) 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. Also, the connec-

tor on the floppy drive connector may have a slot. When the slot

is up, pin number one should be on the right. Check the documen-

tation that came with the drive for more information.

Next, if required, connect the B: floppy drive to the connectors in

the middle of the cable as described above.

If you need to make your own cable, you can find the pin assign-

ments for the card’s connector in Appendix D.

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Acer 486 Specifications Page 23