Jumpering - HP 3000 9x9KS Service Manual

Jumpering

Setting the SCSI ID. Figure 8-32 shows the rear view of the C2478SZ.
There are three significant bits in the ID, giving an ID range of 0 to 7 inclusive as shown:
The C2478SZ reads the SCSI ID at power up and during selftest in order to determine the selected target ID
of the tape drive on the interface bus. The C2478SZ will provide termination power for the SCSI termination
resistors if a jumper is set across the two pins marked
Default Jumper Settings = Term Power Disabled (no jumper)
Figure 8-32. C2478SZ Jumper Diagram
SCSI ID Bit 2
0 0
1 0
2 0
3 0
4 1
5 1
6 1
7 1
1 = shorted
0 = open
Term power
Bit 1 Bit 0
0 0
0 1
1 0
1 1
0 0
0 1
1 0
1 1
in Figure 8-32.
SCSI and I/O 8-63