Jumpering - HP 3000 9x9KS Service Manual

Jumpering

Setting the SCSI ID
Figure 8-38 shows the rear view of the A3183A
There are three significant bits in the ID, giving an ID range of 0 to 7 inclusive as shown:
The HP A3183A 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. Data Compression Control is not used in this system application.
Terminator Power - When jumper is installed, the device will supply termination power to pin 26 of the
SCSI bus. (NOTE, this device has no on board termination capability.)
Default Jumper Settings = Term Power Disabled (no jumper)
8-72 SCSI and I/O
Figure 8-38. A3183A 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
Bit 1 Bit 0
0 0
0 1
1 0
1 1
0 0
0 1
1 0
1 1