Northern Telecom BCS35 Replacement Manual page 145

Table 13–5xxx
Disk controller circuit pack (B21A1) options – part number: 680–9143
Device type
(number)
Jumper State
(W0) 0 shorted; I.D. = 0
1 shorted; I.D. = 1
2 shorted; I.D. = 2
3 shorted; I.D. = 3
4 shorted; I.D. = 4
5 shorted; I.D. = 5
6 shorted; I.D. = 6
7 shorted; I.D. = 7
Jumper 1 – 2 = parity enabled
(W1)
2 – 3 = parity disabled
Jumper Not used
(W2)
Jumper W3
(W3)
(W4)
open
short
open
short
Jumper Function established in the
(W5) copper tracings.
(W6)
(W7)
(W8)
Strap None used
DIP None used
Switch
Rotary None used
Switch
Switch None used
Position/setting
Pri.
W4 Bytes Per
Sector
open 128
open 256
short 512
short 1024
Disk Crossover and Controller circuit packs 129
Function
SCSI Controller ID.
Defines the SCSI
device priority. ID 7 is
the highest priority in a
multi–controller
configuration.
Host Parity
Select disk drive
Sector Size
Logical Unit Number
Assignment.
DPP Card Replacement Guide BCS35 and up
Setting
Factory On–site
0 Must be
the same
as the
factory
setting.
1–2 Must be
the same
as the
factory
setting.
W3 Must be
Open the same
as the
W4 factory
Short setting.
Out Must be
Out the same
Out as the
Out factory
setting.