IBM 21Y Manual Do Utilizador
Installing options
67
SCSI connector pin-number assignments
The following table shows the pin-number assignments for
the 68-pin SCSI connectors.
the 68-pin SCSI connectors.
Serial ports
The server has two standard serial ports: Serial port A and
Serial port B.
Serial port B.
Table 11. 68-pin SCSI connector pin-number assignments
Pin
Signal
Pin
Signal
1
+Data 12
35
-Data 12
2
+Data 13
36
-Data 13
3
+Data 14
37
-Data 14
4
+Data 15
38
-Data 15
5
+Data P1
39
-Data P1
6
+Data 0
40
-Data 0
7
+Data1
41
-Data 1
8
+Data 2
42
-Data 2
9
+Data 3
43
-Data 3
10
+Data 4
44
-Data 4
11
+Data 5
45
-Data 5
12
+Data 6
46
-Data 6
13
+Data 7
47
-Data 7
14
+Data P
48
-Data P
15
Ground
49
Ground
16
DIFFSENS
50
Ground
17
Term power
51
Term power
18
Term power
52
Term power
19
Reserved
53
Reserved
20
Ground
54
Ground
21
+Attention
55
-Attention
22
Ground
56
Ground
23
+Busy
57
-Busy
24
+Acknowledge
58
-Acknowledge
25
+Reset
59
-Reset
26
+Message
60
-Message
27
+Select
61
-Select
28
+Control/Data
62
-Control/Data
29
+Request
63
-Request
30
+Input/Output
64
-Input/Output
31
+Data 8
65
-Data 8
32
+Data 9
66
-Data 9
33
+Data 10
67
-Data 10
34
+Data 11
68
-Data 11
34
1
68
35