Western Digital WD1002A-WX1 MTL setting manual edited (VER.1) REV D and up

S1 D eta il

1 2 3 4 8 7 6 5

J4

W3

W5

W6

W7

W8

W4

S1

J1

C1202

J3

J2

WESTERN DIGITAL CORPORATION
W D 1 0 0 2 A - W X 1 ( V E R . 1 ) REV D and up

8-bitData Bus
ProprietaryCard Size
Two ST-506/412(MFM) drivesHard Drives supported
NoneFloppy drives supported

CONNECTIONS

20-pin data cable connector-drive 1

5-pin connector-DC power

USER CONFIGURABLE SETTINGS

OpenW3BIOS disabled

pins 1 & 2 closedW4I/O port address 324h

pins 2 & 3 closedW5BIOS ROM size 16K

pins 1 & 2 closedW616 head hard drive supported (head select 3)

í pins 2 & 3 closedW8Single controller setting, primary controller

í OpenS1/5Factory configured - Do not alter

WESTERN DIGITAL CORPORATION
W D 1 0 0 2 A - W X ( V E R . 1 )

J134-pin control cable connector-hard drive
J220-pin data cable connector-drive 0

LocationFunctionLocationFunction

J3

J4

PositionLabelFunction

ClosedW3í BIOS enabled

pins 2 & 3 closedW4í I/O port address 320h

pins 1 & 2 closedW5í BIOS ROM size 32K or 64K (hard-wired)

pins 2 & 3 closedW6í 8 head hard drive with RWC supported

pins 1 & 2 closedW7í Hard drive Interrupt is IRQ5 (hard-wired)
pins 2 & 3 closedW7Hard drive Interrupt is IRQ2

pins 1 & 2 closedW8Dual controller setting, secondary controller

OpenS1/6í Factory configured - Do not alter
OpenS1/7í Factory configured - Do not alter
OpenS1/8í Factory configured - Do not alter

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BiOS REVISION DRIVE TYPE TABLE

Drive1 Drive 0

# S1/1 S1/2 S1/3 S1/4 Cap. Hds Cyls. WP RWC

0 closed closed closed closed 20 MB 4 612 613 613
1 open closed open closed 10 MB 2 612 128 128
2 closed open closed open 20 MB 4 612 128 613

í 3 open open open open 10 MB 4 306 0 306

Note: S1/1 and S1/2 select the setting for drive1 & S1/3 and S1/4 select the setting for drive 0

MISCELLANEOUS TECHNICAL NOTES

Note: This controller has a built-in low-level format program. To enter the program, run the DEBUG utility

supplied with DOS and at the prompt enter: G=C800:5. Two additional jumpers may be present,
W1 & W2, and are reserved for factory use and may not be changed.