Filter
Top Products
8-36 Chapter 8, Jumper Settings and Switch Settings
Addendum 108431-001 (11-88) to
Manual No. 108033-003
8.14 300-/600-MEGABYTE
FIXED DISK DRIVE
EXPANSION UNIT
The 300-/600-Megabyte Fixed Disk Drive Expan-
sion Unit can be used with 386-based COMPAQ
desktop systems with ROM revision G or later.
NOTE: A terminating resistor must be installed
on a 300-Megabyte Fixed Disk Drive.
Refer to Chapter 7, REMOVAL AND
REPLACEMENT PROCEDURES, for
detailed steps. If two drives are present
in the expansion unit, only one drive
should have a terminating resistor.
Whenever more than one drive control-
ler is in a system, one controller must be
set as primary; the other controller must
be set as secondary.
Table 8-22 lists the SW500 settings when
installing the expansion unit with the ESDI
External Fixed Disk Drive Controller Board
(Figure 8-22). See Chapter 7, REMOVAL AND
REPLACEMENT PROCEDURES, for detailed
steps. See Chapter 9, MASS STORAGE CON-
FIGURATIONS, for cabling and configurations.
Table 8-22. ESDI External Fixed
Disk Drive Controller Board
Switch Settings
SW500 Settings
1 2 3 Function
OFF
ON
Primary fixed disk drive
address select
Secondary fixed disk
drive address select
OFF
ON
OFF
ON
OFF
OFF
ON
ON
Interrupt select IRQ15
Interrupt select IRQ14
Interrupt select IRQ12
Interrupt select IRQ11
Default