Installation Guide
Western Digital Corporation
1-5
Do I need to Change Any Jumpers?
Probably not. We recommend that you not change any of the
jumper settings unless you have one of the following conditions:
•
You have an original Conner CP342 or CP3022 intelligent
drive in an IBM AT.
•
You want to disable the floppy drive controller or set an
alternate address at 370-377.
•
You have a two-speed floppy drive.
•
You want to connect logic ground to the chassis.
The factory default jumper settings are shown below. WI jumper
block allows the DIRQ14 signal to pass directly to the host. Jumper
blocks W2 and W3 define the floppy address and floppy drive speed. W4
defines the ground connection. Jumper settings are discussed in detail in
Appendix B, Tables B-2 through B-5.
DIRQ14 passed directly to host bus 13
Floppy controller enabled
Floppy primary address is 3F0-3F7
Single speed floppy drive
(Dual speed floppy drive is selected, if this jumper block is
installed and jumpered.)
Logic ground is not connected to chassis
(Logic ground is connected to chassis, if this jumper block
is installed and jumpered.)
If you need to change the jumper settings, do this before you
install the WDAT-240 board into your computer. You change the jumper
settings by installing or removing the jumper shunts on the jumper
blocks (WI through W4). Go to Appendix B for exact instructions
BEFORE you change the jumper settings. If you do not need to change
the jumpers, you can proceed to Chapter 2.
