Intergraph StudioZ GT RAX System Reference Manual page 67

Narrow Ultra SCSI
The Narrow Ultra SCSI port connects external SCSI devices, such as tape drives or hard
disks, to the system's Narrow Ultra SCSI bus. The maximum sustainable data transfer rate is 40
MB per second.
NOTE Pins 12, 13, 14, 37, and 39 are not connected; pins not listed are connected to
ground.
25
50
1
26
Pin Signal
26 Command Data-0
27 Command Data-1
28 Command Data-2
29 Command Data-3
30 Command Data-4
31 Command Data-5
32 Command Data-6
33 Command Data-7
34 Command Data Parity
38 Terminator Power
41 Attention
43 Busy
44 Acknowledge
45 Reset
46 Message
47 Select
48 Command
49 Request
50 Input/Output
57