HP Digital AlphaStation 255 Family User Manual

Technical Specifications
B–7
SCSI Port Connector
The external SCSI connector is a 50-pin high-density connector. Table B–10 lists the pin
assignments.
Table B–10: SCSI Port Pinouts
Pin Signal Pin Signal
1 gnd 26 –DB (0)
2 gnd 27 –DB (1)
3 gnd 28 –DB (2)
4 gnd 29 –DB (3)
5 gnd 30 –DB (4)
6 gnd 31 –DB (5)
7 gnd 32 –DB (6)
8 gnd 33 –DB (7)
9 gnd 34 –DB (P)
10 gnd 35 gnd
11 gnd 36 gnd
12 reserved 37 reserved
13 open 38 TERMPWR
14 reserved 39 reserved
15 gnd 40 gnd
16 gnd 41 –ATN
17 gnd 42 gnd
18 gnd 43 –BSY
19 gnd 44 –ACK
20 gnd 45 –RST
21 gnd 46 –MSG
22 gnd 47 –SEL
23 gnd 48 –CD
24 gnd 49 –REQ
25 gnd 50 –I/O

HP Digital AlphaStation 255 Family Specifications

General

Brand	HP
Model	Digital AlphaStation 255 Family
Category	Desktop
Language	English