Northern Telecom BCS35 Replacement Manual page 144

128 Disk Crossover and Controller circuit packs
Table 13–4xxx
Disk controller PCA (B21A1) option references – part number: 680–9143
Device type
(number)
Jumper
(W0) 0
1
2
3
4
5
6
7
Jumper 1
(W1)
2
Jumper
(W2)
Jumper
(W3)
(W4)
Jumper
(W5)
(W6)
(W7)
(W8)
Strap
DIP
Switch
Rotary
Switch
Switch
297-1001-536 Standard 01.03 August 1996
Position/setting
State Pri.
shorted; I.D. = 0
shorted; I.D. = 1
shorted; I.D. = 2
shorted; I.D. = 3
shorted; I.D. = 4
shorted; I.D. = 5
shorted; I.D. = 6
shorted; I.D. = 7
– 2 = parity enabled
– 3 = parity disabled
Not used
W3 W4 Bytes Per
Sector
open open 128
short open 256
open short 512
short short 1024
Function established in the
copper tracings.
None used
None used
None used
None used
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.
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.