Data General AViiON 5500 Series, Installing, Expanding, And Maintaining

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Integrated I/O connectors and signals
A-10
014–002250–01
The SCSI bus standard describes two types of pin assignments: one
for devices that use single–ended drivers and another for devices
that use differential drivers. The integrated SCSI bus is configured
for single–ended devices by default.
Table A–5 lists the signals for the integrated bus.
Table A–5 Integrated SCSI bus connector signals
Connector contact number Signal
1 – 11 Ground
12 Reserved
13 TERMPWR (Termination Power)
14 Reserved
15–25 Ground
26 Data Bus 0 –DB(0)
27 Data Bus 1 –DB(1)
28 Data Bus 2 –DB(2)
29 Data Bus 3 –DB(3)
30 Data Bus 4 –DB(4)
31 Data Bus 5 –DB(5)
32 Data Bus 6 –DB(6)
33 Data Bus 7 –DB(7)
34 Data Bus P –DB(P)
35 Ground
36 Ground
37 Reserved
38 TERMPWR (Termination Power)
39 Reserved
40 Ground
41 –ATN (Attention)
42 Ground
43 –BSY (Busy)
44 –ACK (Acknowledge)
45 –RST (Reset)
46 –MSG (Message)
47 –SEL (Select)
48 –C/D (Control/Data)
49 –REQ (Request)
50 –I/O (Input/Output)