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Table 3-1.
Configuration Jumpers
A
o
0
B
- SCSI Reset Option
C
0
0
D
- Reserved
E
0
0
F
- Hard Sectored
Lun~
G
o
0
H
- Hard Sectored Luni
J
0
0
K
- Reserved
o
0
Diag - Diagnostic Mode
o
0
Par
-
Parity Enable
2
o
0
A4
- SCSI Address 2
1
o
0
A2
- SCSI Address 2
0
0
0
Al
- SCSI Address 2
3.4.1
SCSI RESET OPTION
The installation of the A-B jumper will cause the ACB-5500 to
initiate a "Hard" reset in response to an SCSI bus reset.
without this jumper installed, a "Soft" reset will result.
The
effect of both a "Hard" and "Soft" reset are detailed in Section
4.1.3.2.
3.4.2
HARD SECTORED/REMOVABLE DRIVES
The installation of the E-F or G-H jumpers will indicate to the
ACB-5500 that a hard sectored drive is attached as logical Unit 0
or
1
respectively.
The presence of a jumper will cause the ACB-
5500 to use the sector pulse input from the drive.
The jumpers
must only be installed if a hard sectored drive is attached.
Hard sectored drives must either be logical unit 0 or 1.
3.4.3
DIAGNOSTIC MODE
The installation of the DIAG jumper will cause the ACB-5500 to
continuously repeat a diagnostic self test.
Appendix A details
this self test.
500504-00
3-4
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