OpenBoot Interface
The OpenBoot firmware provides a command-line interface for the user at the system console. On older Sun systems such as SPARCstation10 and SPARCstation20, this command-line interface had two modes: the Restricted Monitor and the Forth Monitor.
The Restricted Monitor
The Restricted Monitor provides a simple set of commands to initiate;booting of the system, resume system execution, or enter the Forth Monitor. The Restricted Monitor is also used to implement system security.
The Restricted Monitor prompt is >. When you enter the Restricted Monitor, the following code displays, showing the commands you can enter:
Type b (boot), c (continue), or n (new command mode) >
The Restricted Monitor commands are listed in Table 10.1.
The Forth Monitor
The Forth Monitor, the default mode in OpenBoot, is an interactive command interpreter that gives you access to an extensive set of functions for hardware and software diagnosis. These functions are available to anyone who has access to the system console.
The Forth Monitor prompt is ok. When you enter the Forth Monitor mode, the following line displays:
Type help for more information ok
On older Sun SPARCstations, if you want to leave the Forth Monitor mode and get into the Restricted Monitor mode, type the following:
ok old-mode
Note
When the system is halted, the PROM monitor prompt displays. The type of prompt depends on your system type. Older Sun systems use the greater-than sign (>) as the PROM prompt. Current Sun systems use ok as the PROM prompt but support the > prompt. To switch from the > prompt to the ok prompt on newer Sun systems, type n at the > prompt.