Northern Telecom BCS35 Replacement Manual page 98

82 SCSI Interface circuit pack
Table 9–1
SCSI circuit pack (A11 and B11) options – part number: NT6M66BA; 380–Mbyte disk drives
with 56K polling and 760–Mbyte Disk Drives, and, NT6M66BD; 1700–Mbyte disk drives
Device type
(number)
Jumper
P1
P4
P5
P6
P7
P8
P9
P11
Note: There are no customer–definable options on this circuit pack. Information is shown for reference only. Use this data
for verification during initial DPP system installation and/or pack replacement to make sure the replacement pack is set up the
same as the pack being replaced.
297-1001-536 Standard 01.03 August 1996
Position/setting
Out = 256K (27C256)
In = 512K (27C512)
Out = NMI disable
In = NMI enable
Out = Watchdog disable
In = Watchdog enable
Out = Normal Arbitration
In = Arbitration gated with
BUSY
Out = BSYIN/BSYOUT
separate
In = BSYIN/BSYOUT tie
together
Out = A select
In = Select disk crossover A
Out = CPU clock disable
In = CPU clock enable
Out = SCCI clock disable
In = SCCI clock enable
Function
256K/512K EPROM
enable
NMI control
Watchdog timer control
Arbitration – In position
is compatible with
existing disk
(BCS25–28) crossover
PCAs
In position is
compatible with existing
disk (BCS25–28)
crossover PCAs
Out position is
compatible with existing
disk (BCS25–28)
crossover PCAs
CPU clock control
CPU clock control
Setting
Factory On–site
In
In
In
Out
Out
In
In
In