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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.
Installation
This section briefly describes the installation of the controller board.
Do NOT use the WD1003V-MM2 with an AT configured, AT
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.
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.
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.
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.
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.
*IBM and AT are registered trademarks and XT is a trademark of
International Business Machines Corporation.
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.
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.
8. Attach drive 1 data cable connector to J3.
9. Attach data cable to drive 1.
10. For WDlOO3V-MM2 users, attach the floppy cable
connector to J 1.
11. For WD1003V-MM2 users, attach cable to floppy
drive(s).
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.
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.
15. Remove or disable any other floppy controller in your
system. The WD floppy controller can not be disabled.
All jumpers OFF for factory defaults.
Figure 1. Jumper Locations
TABLE 1. JUMPER SETTINGS
Jumper/
Pin number Position Description
W1/
1-2 OFF Winchester(s) in
latched mode.
ON Winchester(s) in
non-latched mode.
3-4 OFF Four byte ECC.
ON reserved.
5-6 OFF Cacheing enabled.
ON Cacheing disabled.
7-8 OFF Format incompatible
with WD 1003-WAH
(WD1003-WA2)
ON Format compatible
with WF 1003-WAH
(WD1003-WA2).
W3/
1-2 OFF Primary Winchester
I/O addresses
ON Secondary Winches-
ter I/O addresses
W4/
1-2 OFF Primary floppy I/O
addresses
ON Secondary floppy I/O
addresses
W5/
1-2 OFF Single speed drives.**
ON Dual speed drives.**
W6/
1-2 OFF Bracket ground op-
eration not used.
ON Connects bracket to
board ground
*Not all jumper headers are installed. Modify jumpers only under the direction of a
qualified individual
**
Do not combine single and dual speed drives in the same system.