WD1003A-RA2 JUMPER SETTINGS
JUMPER
PIN CONNECTS
DESCRIPTION
W1
1-2
2-3
This configuration used with a WDllC00C-22 at board location Ul6.
Required only on early units with WDl lC00-22 at board location U8 and
W5 is jumpered 1 to 2. DO NOT JUMPER WITH WDllC00C-22
INSTALLED.
W2
1-2
Standard factory setting. No translation for drive 0.
OPEN
1-2
CLOSED
Enables translation for drive 0. Translation is only available for 615
cylinders and four headed drives. In translation mode, the controller
translates the 26 physical sectors per track into 17 sectors. The extra
sectors are "translated" into logical heads. To use the translation mode,
select through the Setup program a 615 cylinder and six head drive type.
(This is drive type three for IBM Personal Computer AT users. Not all
AT-compatible systems use the same drive tables as IBM.) This
configuration must be used when running an operating system or applica-
tion program which requires a 17 sector per track disk drive.
W2
3-4
Standard factory setting. No translation for drive 1.
OPEN
CLOSED
Enables translation for drive 1.
W3
3-4
1-2
Standard factory setting. DO NOT OPEN.
Standard factory setting. DO NOT OPEN.
W4
3-5
Standard factory setting. Selects primary addresses, 1F0 through 1F7 hex,
for the hard disk controller. Do not modify the primary address jumper
unless your operating system is configured to accept more than two hard
disk drives. Also verify that W4 positions 4 and 6 are connected if 3 and
5 are jumpered.
4-6
Standard factory setting. Selects primary addresses, 3F0 through 3F7 hex,
for the floppy disk controller. Do not modify the primary address jumper
unless your operating system is configured to accept more than two hard
disk drives. Also verify that W4 3 and 5 are connected if 4 and 6 are
jumpered.
1-3
Selects secondary addresses, 170 through 177 hex, for the hard disk
controller. Also verify that W4 2 and 4 are connected if 1 and 3 are
jumpered.
2-4
Selects secondary addresses, 370 through 377 hex, for the floppy disk
controller. Also verify that W4 1 and 3 are connected if W4 2 and 4 are
jumpered.
W5
1-2
Standard factory setting. Closed by etch on the solder side of the board.
Configures the board to control drives with a maximum of eight heads or
Reduced Write Current (RWC).
2-3
Carefully cut etch and jumper to operate the controller with hard disk
drives having a maximum of 16 heads.
W6
Removed from final release.
W7
2-3
1-2
Standard factory setting. Supports 300 or 360
RPM
floppy disk drives.
Supports dual speed spindle floppy drives.
Summary of Contents for WD 1003-RA2
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