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Jumpers
Installing a jumper shunt or removing a jumper shunt from the
pins on a jumper block turns certain functions on or off. These functions
define the peripheral hardware to your computer.
Western Digital configures the jumpers for the most common ap-
plications. It is unlikely that you will need to change any of the jumper
settings.
Jumper Settings for the WDAT-140
The WDAT-140 board contains one jumper block, W1, which
allows the DIRQl4 signal to pass directly to the host.
Do I Need to Change Any Jumpers?
No. Do NOT change any jumper settings on your WDAT- 140
board, unless you have an original Conner CP342 or CP3022 intelligent
drive in an IBM AT. The factory default jumper setting is shown below.
Jumper settings are discussed in detail in Appendix B, Table B-1.
If you need to change the jumper settings, do this before you
install the WDAT- 140 board into your computer. You change the
jumper settings by installing or removing the jumper shunts on the W1
jumper block. 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.
Jumper Settings for the WDAT-240
The WDAT-240 board contains four jumper blocks (W1, W2, W3,
and W4) which define hardware parameters. By moving the jumper
shunts, you can change the definition of the hardware which is attached
to your computer. The jumpers must be configured to match your system
hardware.
1-4
Western Digital Corporation
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