MBF COMPANY CONFIDENTIAL FIELD INFORMATION BULLETIN
SERVICE GROUP(S): MICRO MFG: WESTERN DIGITAL
NACS TYPE(S): N075 MFG. MODEL(S): HARD DISK CONTROLLER
CATEGORY: PC ADD-IN BOARDS DESC: WD-1002
*** TABLE OF CONTENTS AS OF 12/20/90 ***
FIB 00001.FORMATTING HARD DRIVES ON WESTERN DIGITAL CONTROLLERS.......07/28/87
FIB 00002.GENERAL INFORMATION FOR WD1002S-WX2.........................08/20/87
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FIB 00001 07/28/87
*** FORMATTING HARD DRIVES ON WESTERN DIGITAL CONTROLLERS ***
TECH TALK WESTERN DIGITAL
MICRO PRODUCTS 5150-5160
When installing a new or replacement hard drive in a IBM - PC
with a Western Digital Hard Drive Adapter, you must run a
special format accessed through Debug on the Supplemental
Programs DOS disks. Run Debug and at the "-" prompt enter
"G= C 800:5", accept the standard defaults and the drive will
format. After this format is complete, run the standard
FDISK and FORMAT routines and the drive will be ready to go.
ORIGINATOR: Howard Wilkens, Kansas City.
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FIB 00002 08/20/87
*** GENERAL INFORMATION FOR WD1002S-WX2 ***
*** GENERAL ***
The Western Digital WD1002S-WX2 is a single board hard disk controller
for IBM PC computers and plug compatibles. The controller can direct
up to two winchester disk drives having standard (ST506) interfaces.
Drive
*** PART NUMBER ***
HD971002
*** BIOS ROM INFORMATION ***
The controller holds a host ROM that defines the type of hard disk(s)
attached. There are also 8 jumpers that further define the drive types.
Currently available ROMs are:
WD # Sorbus # description BOARD TYPES
62-000042-011 HD971011 XT HD BIOS WX1,WX2
62-000042-012 HD970012 XT HD BIOS WX1,WX2
62-000042-013 XT HD BIOS WX1,WX2
62-000043-10 HD971010 HD VIRTUAL BIOS WX1,WX2
62-000089-030 RLL BIOS WX1,WX2,27XX
*** Compatible Controllers ***
WD1002-WX2 Original board introduced in 1983 ROM location U36
WD1002A-WX2 Same as WD1002S-WX2 (long board) ROM location U14
U10 in early versions
The BIOS ROMs are interchangeable between boards.
*** JUMPER OPTIONS ***
SW1-8 OPEN XT CLOSED AT
SW1-7 OPEN IRQ5 CLOSED IRQ2
SW1-6 OPEN 17 SECTORS PER TRACK CLOSED 26 SECTORS PER TRACK
SW1-5 NOT USED OPEN
(default is all open)
SW1 3 & 4 Select BIOS table for drive 0
SW1 1 & 2 Select BIOS table for drive 1
42-011/42-012/42-013/43-010 BIOS ROM
TABLE DRIVE 1 DRIVE 0 HEADS CYLINDERS PRECOMP CAP.
0 CLOSE CLOSE CLOSE CLOSE 4 612 NONE 20 MB
1 OPEN CLOSE OPEN CLOSE 2 612 128 10 MB
2 CLOSE OPEN CLOSE OPEN 4 612 128 20 MB
3 OPEN OPEN OPEN OPEN 4 306 NONE 10 MB
With -010 BIOS ROM, no jumpers on s1 will allow manual configuration of any
drive size. Sizes above 33 meg must be splitt into 2 hard drives.
42-010
3 CLOSE CLOSE CLOSE CLOSE 4 306 NONE 10 MB
2 CLOSE OPEN CLOSE OPEN 6 306 256 15 MB
1 OPEN CLOSE OPEN CLOSE 8 375 NONE 24 MB
0 OPEN OPEN OPEN OPEN 2 306 NONE 5 MB
94-030 (MAY BE SET WITH NO JUMPERS AND AUTO-CONFIGURE)
0 CLOSE CLOSE CLOSE CLOSE 4 612 450 20 MB
1 OPEN CLOSE OPEN CLOSE 4 306 NONE 10 MB
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2 CLOSE OPEN CLOSE OPEN 2 615 450 10 MB
3 OPEN OPEN OPEN OPEN 4 615 450 20 MB
*** FORMAT PROCEDURE ***
1. At the A> prompt load and run the debug utility
A>DEBUG
2. At the debug prompt, type the following lines;
-rax
ax 0000 (cpu reply)
:xxyy xx=relative drive number, yy=interleave factor (03=standard)
-g=c800:5
3. when the program asked for confirmation reply with Y. This program must be
run twice if formatting 2 drives. Wait for format succesful message.
4. With newer ROMs such as the 43-010 and no table specified, additional input
is required as follows;
WX2 format revision T.n (etc)
key in drive no. and interleave as follows: d ii
Enter relative drive no. (0-1) followed by space
Enter interleave factor (1-16) 3 is standard
The next message to appear will ask for drive characteristics as follows:
ccc rrr ppp ee oo wher
ccc = total number of cylingers (1-4 digits)
h = number of heads (1-2 digits)
rrr = starting reduced write cylinder (1-4 digits)
ppp = write precomp cylinder (1-4)
ee = jmax correctable error burst length (1-2 digits)
oo = CCB option byte (1 hex digit)
Defaults for rrr = max cyl +1, write precomp = max cyl +1
Maximum correctable error burst length = 11 bits
CCB option byte = 05
Enter this information if it is available for the drive being installed.
ORIGINATOR: J. HILL
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