USER'S GUIDE
WD1003V-MM1
Winchester Disk
Controller
WD 1003 V-MM2
Winchester/Floppy
Disk Controller
Important Information
Do Not Discard
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3. 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 board in place. It is best to
locate the controller in the closest available expansion slot
relative to the drive.
TABLE 1. JUMPER SETTINGS
Jumper/
Product Description
This document describes the hardware and software installation of the
WDl003V-MMl and WDl003V-MM2, 16-bit disk controllers for the
*
*
IBM Personal Computer AT or AT compatible computer. Both
controllers' Winchester interface conform to ST506/ST412
specifications. The WD1003V-MM2 's floppy controller supports four
floppy drive types (360 KB, 720 KB, 1.2 MB, and 1.44 MB. Do not
confuse the number of drive types with the number of floppy drives that
can be connected to the WDl003V-MM2. Only two internal floppy
drives may be daisy chained to J1.) The WDl003V- MM2 supports
"intelligent" 1.44 MB media drives. These intelligent drives obtain the
drive type and data rate from the drive's media and do not depend upon
the state of J1 pin 2 for this information.
Pin number
Position
Description
W1/
1-2
4. Attach the drive control cable connector to J5.
5. Attach the control cable to drive(s).
6. Attach drive 0 data cable connector to J4.
7. Attach data cable to drive 0.
OFF
Winchester(s) in
latched mode.
ON
Winchester(s) in
non-latched mode.
8. Attach drive 1 data cable connector to J3.
9. Attach data cable to drive 1.
3-4
5-6
7-8
OFF
Four byte ECC.
ON reserved.
10. For WDlOO3V-MM2 users, attach the floppy cable
connector to J 1.
OFF
ON
Cacheing enabled.
Cacheing disabled.
Installation
This section briefly describes the installation of the controller board.
Do NOT use the WD1003V-MM2 with an AT configured, AT
11. For WD1003V-MM2 users, attach cable to floppy
drive(s).
OFF
ON
Format incompatible
with WD 1003-WAH
(WD1003-WA2)
Format compatible
with WF 1003-WAH
(WD1003-WA2).
*
compatible, or XT floppy controller in the same system. Removal of
the extra floppy controller is necessary for proper operation of the
WD1003V-MM2. Disabling the floppy controller on the WD1003V-
MM2 is NOT possible.
12. Attach the Winchester activity cable connector to J6.
13. Check the cable connections carefully . Ensure that pin 1
on the board connectors mates with pin 1 on the cable
connectors. Pin 1 on the cable connectors is usually on the
color coded side.
A minor incompatibility exists between the WDl003V-MM1 (or
WD1003-WA2) and the WDl003-WAH (or WDl003-WA2). If the
drive contains more than eight heads, e.g. a 16 head drive, the
WD1003-WAH numbers heads 8 through 15 as 0 through 7 in media's
ID fields. The WD1003V controllers number heads 8 through 15 as 8
through 15. To correct this problem, install a jumper on Wl pin 7-8
when using the WD1003V controller on a drive formatted with the
WD1003-WAH (WD1003-WA2). This problem is not manifested in
drives with less than eight heads.
W3/
1-2
14. Install the controller board into the expansion slot. Make
sure that the board is seated properly by pressing down on
both ends of the board. Secure the board with the bracket
screw.
OFF
ON
Primary Winchester
I/O addresses
Secondary Winches-
ter I/O addresses
15. Remove or disable any other floppy controller in your
system. The WD floppy controller can not be disabled.
W4/
1-2
OFF
ON
Primary floppy I/O
addresses
Secondary floppy I/O
addresses
CAUTION
Handle the controller board by the ends of the board. Some of the
chips are static sensitive and damage may occur if the board is
incorrectly handled.
W5/
1-2
1. Verify the controller jumper settings. Only verify the settings.
Modification of the standard factory settings is rarely necessary. Modify
jumpers only under the direction of a qualified individual; i.e. your
dealer. Figure 1 illustrates the jumper locations for both controller
boards. Refer to Table 1 for further information on jumper settings.
OFF
ON
Single speed drives.**
Dual speed drives.**
W6/
1-2
OFF
ON
Bracket ground op-
eration not used.
Connects bracket to
board ground
2. Verify termination on last drive. Verify proper setting of drive select
switches. Consult the drive technical manual for proper drive
termination and selection information.
*Not all jumper headers are installed. Modify jumpers only under the direction of a
*IBM and AT are registered trademarks and XT is a trademark of
International Business Machines Corporation.
qualified individual
**
Do not combine single and dual speed drives in the same system.
All jumpers OFF for factory defaults.
Figure 1. Jumper Locations
1
2
3
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