SMC Networks 486DX4 - Manual (Page 20)

AR-B1462 User¡ ¦s Guide
3-2
3.2 SYSTEM SETTING
Jumper pins allow you to set specific system parameters. Set them by changing the pin location of jumper blocks.
(A jumper block is a small plastic-encased conductor [shorting plug] that slips over the pins.) To change a jumper
setting, remove the jumper from its current location with your fingers or small needle-nosed pliers. Place the
jumper over the two pins designated for the desired setting. Press the jumper evenly onto the pins. Be careful not
to bend the pins.
We will show the locations of the AR-B1462 jumper pins, and the factory-default setting.
CAUTION: Do not touch any electronic component unless you are safely grounded. Wear a grounded wrist strap
or touch an exposed metal part of the system unit chassis. The static discharges from your fingers can
permanently damage electronic components.
3.2.1 FDD Port Connector (CN8)
The AR-B1462 provides a 34-pin header type connector for supporting up to two floppy disk drives.
To enable or disable the floppy disk controller, please use the BIOS Setup program.
Ground 1 2 DRVEN 0
4 Not Used
6 DRVEN 1
8 -INDEX
10 -MTR 0
14 -DRV0
12 -DRV 1
16 -MTR1
18 DIR
20 -STEP
22 -WDATA
24 -WGATE
26 -TRK 0
28 -WRPT
34 DSKCHG
32 -HDSEL
30 -RDATA
Ground 3
Ground 5
Ground 25
Ground 11
Ground 15
Ground 9
Ground 7
Ground 19
Ground 17
Ground 23
Ground 21
Ground 13
Ground 33
Ground 31
Ground 29
Ground 27
Figure 3-2 CN8: FDD Port connector