IBM 86655RY Hardware Maintenance Manual - Page 97

Table 14. 68-pin SCSI connector pin-number assignments. Pin Signal Pin 16 DIFFSENS 50 17 Term power 51 18 Term power 52 19 Reserved 53 20 Ground 54 21 +Attention 55 22 Ground 56 23 +Busy 57 24 +Acknowledge 58 25 +Reset 59 26 +Message 60 27 +Select 61 28 +Control/Data 62 29 +Request 63 30 +Input/Output 64 31 +Data 8 65 32 +Data 9 66 33 +Data 10 67 34 +Data 11 68 Ground Term power Term power Reserved Ground -Attention Ground -Busy -Acknowledge -Reset -Message -Select -Control/Data -Request -Input/Output -Data 8 -Data9 -Data 10 -Data 11 Signal Serial ports The server has two standard serial ports: Serial port A and Serial port B. The operating system can use and share both serial ports; however, the integrated Netfinity Advanced System Management Processor can use and share only Serial port A. 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, select Devices and I/O Ports; then, press Enter. Note: The Devices and I/O Ports choice appears only on the full configuration menu. If you set two levels of passwords, you must enter the administrator password to access the full configuration menu. Installing options 87