IBM 8669 Hardware Maintenance Manual - Page 79

Serial ports, Viewing or changing the serial-port assignments, Serial-port connectors

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Pin Signal 15 Ground 16 DIFFSENS 17 Term power 18 Term power 19 Reserved 20 Ground 21 +Attention 22 Ground 23 +Busy 24 +Acknowledge 25 +Reset 26 +Message 27 +Select 28 +Control/Data 29 +Request 30 +Input/Output 31 +Data 8 32 +Data 9 33 +Data 10 34 +Data 11 Pin Signal 49 Ground 50 Ground 51 Term power 52 Term power 53 Reserved 54 Ground 55 -Attention 56 Ground 57 -Busy 58 -Acknowledge 59 -Reset 60 -Message 61 -Select 62 -Control/Data 63 -Request 64 -Input/Output 65 -Data 8 66 -Data9 67 -Data 10 68 -Data 11 Serial ports The server has two standard serial ports, Serial port A and Serial port B. The operating system can use both serial ports, Serial port A and Serial port B. Some application programs require specific ports, and some modems function properly only at certain communication port addresses. You might need to use the Configuration/Setup Utility program to change communication port address assignments to prevent or resolve address conflicts. Viewing or changing the serial-port assignments: To view or change the serial-port assignments: 1. Restart the server and watch the monitor screen. 2. When the message Press F1 for Configuration/Setup appears, press F1. 3. From the main menu, click Devices and I/O Ports; then, press Enter. 4. Select the serial port; then, use the arrow keys to advance through the settings available. 5. Select Save Settings; then, select Exit Setup to exit from the Configuration/Setup Utility main menu. Serial-port connectors: The following table shows the pin-number assignments for the 9-pin, male D-shell serial-port connectors on the rear of the server. These Installing options 69

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Pin
Signal
Pin
Signal
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
-Data9
33
+Data 10
67
-Data 10
34
+Data 11
68
-Data 11
Serial ports
The server has two standard serial ports, Serial port A and Serial port B. The
operating system can use both serial ports, Serial port A and Serial port B.
Some application programs require specific ports, and some modems function
properly only at certain communication port addresses. You might need to use the
Configuration/Setup Utility program to change communication port address
assignments to prevent or resolve address conflicts.
Viewing or changing the serial-port assignments:
To view or change the
serial-port assignments:
1.
Restart the server and watch the monitor screen.
2.
When the message
Press F1 for Configuration/Setup
appears, press F1.
3.
From the main menu, click
Devices and I/O Ports
; then, press Enter.
4.
Select the serial port; then, use the arrow keys to advance through the settings
available.
5.
Select
Save Settings
; then, select
Exit Setup
to exit from the
Configuration/Setup Utility main menu.
Serial-port connectors:
The following table shows the pin-number assignments
for the 9-pin, male D-shell serial-port connectors on the rear of the server. These
Installing options
69