IBM RS6000 Service Guide - Page 192

Text-Based System Management Services The text-based Open Firmware command line and System Management Services are available if an ASCII terminal is attached to your system unit. The text-based Open Firmware command line allows you to configure some adapters, and the System Management Services makes it possible for you to view information about your system unit and to perform such tasks as setting passwords and changing device configurations. To enter the Open Firmware command line, you must press the 8 key after the keyboard text symbol appears during startup. If you have pressed the 8 key, the Open Firmware command line (an "OK" prompt) appears after the initialization and power-on self tests (POST) are complete. The Open Firmware command line can be used to set up adapters that are not configurable with the System Management Services. Your adapter documentation directs you to use this option if it is needed. To exit from the Open Firmware command enter reset-all or power the system down and reboot. To start the text-based System Management Services instead of the Open Firmware command line, press 1 on the ASCII terminal keyboard when the keyboard text symbol appears during startup. 5-24 Service Guide