cl
1
cl
2
cl
3
-
BusLcgic
T
:
Host Adapter
u
T
:
SCSI
U
Device
r
,
I I
I
1
3-l
BusLogic
:
SCSI
:
SCSI
Host Adapter
G
’
Device
2
Device
L
BusLogic
Host Adapter
:
SCSI
I
(TERM = OFF)
c
Device
-
I
I
I
Figure 2-1. SCSI Terminator Configurations
Configuring Switch Settings
Before installing the adapter, you must check the adapter switch configu-
ration to verify that the factory-shipped settings for BIOS
Address
and Port
Address are correct for your system.
local bus dock speed
SWlTCH18
7 6 5 4 3 z
11
Figure 2-2.
BT-445C
Switch Detail
2-4
n
Installation
8
8
8
I
n
The Port Address must be unique. The adapter is factory-shipped with
Port Address 330. Be sure that this value does not conflict with other in-
stalled cards.
One card in the system must have BIOS enabled. By default the
BT-
445C’s BIOS is
enabled
at
addressDCOOOH.
If other cards are installed,
check each one to determine whether the default
BIOS
address for the
BT-445C
is available.
Switch 4 selects the local bus clock speed. By default it is set for a moth-
erboard operating with a clock speed of
greater
than 33
MHz (Pin 4 is in
the ON
position).
Switch 8 enables/disables the floppy connector on the BT-445C. It is
en-
abZed
(Switch 8 is in the ON position) by default.
To change the Port Address, set Switches
3,2
and 1 to the desired address
as shown in the table below:
SW3 SW2
SW1
Port Address
ON ON
ON
330 (default)
ON ON
OFF 334
ON OFF
ON
230
ON
OFF
OFF 234
OFF
ON
ON
130
OFF
ON
OFF
134
OFF
OFF
X
X
(X=Don’t
Care)
To change the BIOS Address, set Switches
7,6
and 5 to the desired address
as shown in the following table:
SW 7 SW6
SW5
BIOS Address
ON
ON
ON
DC000 (default)
ON ON
OFF
08000
ON OFF
ON
D4000
ON
OFF
OFF
DO000
OFF
ON
ON
cc000
OFF
ON OFF
C8000
OFF
OFF
X
Disabled
(X=Don’t
Care)
Installation a 2-5
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General