Category : Tutorials + Patches
Archive   : WDDOCS.ZIP
Filename : 1002AFOX.TXT

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WD1002A-FOX

User Guide

The Western Digital WD1002A-FOX diskette/floppytape controller is
compatible with an IBM Personal Computer XT or IBM Personal Computer
AT and will support up to four drives. The optional BIOS ROM allows
XT and XT compatible systems to support 720KB, 1.2 or 1.44 megabyte
diskette drives.

The WD1002A-FOX is equipped with data connectors and power connector
for up to two external floppy drives. However, the controller will
not support high density (1.2 or 1.44 megabyte) floppy drives
externally. If you connect four drives to the controller, the 360
and/or 720KB drives should be connected externally with the 1.2
and/or 1.44 megabyte drives connected internally.

Further, if you are using the WD1002A-FOX as a floppy controller in
an IBM AT or compatible system, you must also have a hard disk drive
or hard disk drive controller in the system.

Four versions of the WD1002A-FOX are available:

Feature 001 (F001): Supports two drives internally and
has no BIOS.

Feature 002 (F002): Supports four drives (two internally
and two externally) and has no BIOS.

Feature 003 (F003): Supports two drives internally and
has the BIOS ROM.

Feature 004 (F004): Supports four drives (two internally
and two externally) and has the BIOS.


Installation of the controller requires three steps: 1) verifying
that the system BIOS supports the drive type; 2) verifying jumper
settings; 3) installing into the host computer. To complete
installation, you will need the following:

A floppy disk cable (daisychain type if installing two internal
drives); external floppy drive cable (if installing drives
externally); screwdriver; MSDOS Version 3.3 or later; Driver.Sys (or
other appropriate device drivers) if installing drives externally.














Preparation of Controller

WARNING
HANDLE THE CONTROLLER BY THE ENDS OF THE BOARD
SOME OF THE CHIPS ARE STATIC SENSITIVE AND DAMAGE
MAY OCCUR IF THE BOARD IS INCORRECTLY HANDLED

Before you can install your WD1002A-FOX, you will need to be certain
that the jumpers (small shorting plugs) are correctly set. Refer to
Table 1 for correct jumper settings. Modification of factory jumper
settings is rarely necessary. Modify jumpers only under the
direction of a qualified individual; i.e. your dealer.

You must also verify that your system BIOS will support the drive
type(s) you have chosen. If the system BIOS does not support your
drive type(s), you will need to use F003 or F004 with the FOX BIOS.
If installing in an AT type system, run SET UP program (or
equivalent) when installing.

It is recommended that you use DOS 3.3 or later. Older versions of
DOS will work with 360KB drives; DOS 3.1 will work with 1.2 Megabyte
drives; DOS 3.2 with 720KB drives; DOS 3.3 with 1.44 Megabyte
drives.

NOTE: There are several types of 1.44 Megabyte drives available.
The WD1002A-FOX will only support "intelligent" 1.44 Megabyte
drives. These drives determine the drive type and data rate from the
drive's own media and not from the controller connection. Another
term used for "intelligent" drive is "density select by media".
Refer to your drive documentation to determine if you have a 1.44
Megabyte "intelligent" drive.



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³ ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ ÀÄÄÙ ³
³ W1ùùù Úij
³ W5ùùù J2 ³
³ W6ùùù ³ ³
³ ³ ³
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³ ³ ³
³ ùùùW2 ³ ³
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-2-















Table 1

Jumper Position Function

W1 1-2 High density to J2 pins 2 and 3

2-3 Ground return J2 pins 2 and 3

W2-W3 BIOS ROM Address Range Select:

W2 2-3 EE000 thru EFFFF
W3 2-3

W2 2-3 CE000 thru CFFFF
W3 1-2

W2 1-2 EC000 thru EDFFF
W3 2-3

W2 1-2 CC000 thru CDFFF
W3 1-2

W4 1-2 Secondary addresses 3F0-377

2-3 Primary addresses 3F0-3F7

W5 1-2 Optional +5V to external drive connector
+5V to J2 pin 4

2-3 No connection. Storage position only

W6 1-2 Optional +12V to external drive connector
+12V to J2 pin 1

2-3 No connection. Storage position only

W7 1-2 Dual speed spindle support. Supports dual
speed drives.

W8 1-2 Chassis ground option. Connects logic
ground to chassis ground.

NOTE: ALL ADDRESSES ARE IN HEX.

-3-





















SWITCH 1 SETTINGS

1,3,5,7 2,4,6,8 Drive Type

OFF OFF 360KB Drive

OFF ON 1.2 Megabyte Drive

ON OFF 720KB Drive

ON ON 1.44 Megabyte Drive

NOTE: Switch 1-1 and Switch 1-2 indicates first drive;
Switch 1-2 and Switch 1-4 indicates second drive;
Switch 1-5 and Switch 1-6 indicates third drive;
Switch 1-7 and Switch 1-8 indicates fourth drive.

Example: Switch 1-1 OFF and Switch 1-2 ON, designates the 1.2
Megabyte Drive as Drive 1 (a:)


**DO NOT COMBINE SINGLE AND DUAL SPEED DRIVES IN THE SAME SYSTEM**


Hardware Installation

WARNING
MAKE SURE COMPUTER IS TURNED OFF
AND POWER IS DISCONNECTED

1. Installation of a 135 watt or greater power supply may be
necessary if you plan to install external disk drives without an
external power supply. Contact your dealer for further information.

2. Remove the blank expansion slot bracket. Put the bracket away
and save it for possible future use. The screw will be used to hold
the new controller in place.

3. Verify that the floppy disk drives are properly installed. Refer
to your drive manuals to determine correct placement of drive select
jumpers and drive terminator installation.

4. If the drive(s) is (are) installed internally, it is best to
locate the FOX controller board in the closest available expansion
slot to the internal drive. However, expansion slot J8 in the IBM
Personal Computer XT should not be used because of the slot's
modified select and timing characteristics.

-4-

















5. Attach 34-pin control connector to J1 on the controller board.
Make sure that Pin 1 of the cable connector goes to Pin 1 on the
controller board. Pin 1 of the cable connector is typically located
on the color coded side of the cable.

6. For external diskette drives or floppytape drives, connect the
37-pin connector to J2 on the F002 or F004 controller boards. Make
sure that pin 1 on the cable is connected to pin 1 on the controller
board.

7. Connect the system's 4-pin power connector to J3. Make sure
that pin 1 on the cable connector is connected to pin 1 of the power
connector.

8. Install the controller board into the expansion slot. Make sure
the board is seated properly by pressing down on both ends of the
board. Secure the board with the bracket screw.

CAUTION
WHEN ROUTING CABLES, BE CAREFUL NOT TO PINCH
THEM. CABLES MUST NOT GET CAUGHT BETWEEN THE
COVER AND THE BOARDS, NOR SHOULD THEY OBSTRUCT
ANY AIR FLOW PATH FROM FANS OR VENTS.