Boot PROM Basics Boot PROM(programmable read only memory): It is a firmware (also known as the monitor program) provides: 1. basic hardware testing & initialization before booting. 2. contains a user interface that provide access to many important functions. 3. enables the system to boot from wide range of devices. It controls the system operation before the kernel becomes available. It provides a user interface and firmware utility commands known as FORTH command set. These commands include the boot commands, the diagnostic commands & the commands for modifying the default configuration. Command to determine the version of the Open Boot PROM on the system: # /usr/platform/'uname -m'/sbin/prtdiag -v (output omitted) System PROM revisions: ---------------------- OBP 4.16.4 2004/12/18 05:21 Sun Blade 1500 (Silver) OBDIAG 4.16.4.2004/12/18 05:21 # prtconf -v OBP 4.16.4 2004/12/18 05:21 Open Boot Architectures Standards: It is based on IEEE standard #1275, accord