Configuration and Jumper Options
SCSI ID Selection
Jumpers at ID0, ID1, and ID2 select the SCSI address. Each SCSI device on one Host Adapter must have a unique address. ID selection is binary, as shown here.
SCSI ID ID2 ID1 ID0
0 out out out
1 out out in
2 out in out
3 out in in
4 in out out
5 in out in
6 in in out
7 (Default) in in in
Interface terminator RN6 provides termination for the SCSI interface lines. Default is RN6 installed. SCSI terminators are installed only in the end devices on the SCSI cable; remove them from each of the other devices.
W1 and W2 select the source of power (+5V) for terminator RN6; W12 controls the drive supplying +5V to the bus.
W1 W2 W12
Y N - Drive provides terminator power. (Default)
N Y - Host provides terminator pwr via J1 pin 26 to RN4 and RN5.
Y - Y Drive supplies +5V to RN6 and to the bus via J1 pin 26.
A jumper at J2 pins 7 and 8 controls the spindle option.
No Jumper The drive starts the spindle motor at power-on. (Default)
Jumper The drive waits for a Start Unit SCSI command to
start the motor.
Write Protect Option
A jumper at J2 pins 11 and 12 selects the Write Protect Option.
Jumper The drive is Write Protected.
No Jumper The drive is not Write Protected. (Default)
Bus Parity Check
A jumper at J2 pins 13 and 14 selects the bus parity check option. The drive always generates
parity regardless of this option.
Jumper SCSI interface parity checking disabled.
No Jumper SCSI interface parity checking on. (Default)
Spindle Sync Termination
Jumpers at W8 and W9 control spindle sync termination. This depends on system configuration; i.e., Master Mode or Master Controller Mode. This function is not used for PC/AT applications.
Yes Yes Slave and Master Sync are terminated.
No No Spindle sync not terminated. (Default)
Frame Ground Option
A jumper at W11 selects the frame ground option.
Jumper Frame ground connected to logic ground.
No Jumper Frame ground not connected to logic ground. (Default)