Digital Equipment AXPpci 33, Design Manual

Page: 81 / 98

Console Commands
E.3.3 boot Command
The boot command performs these functions:
• Initializes the processor
• Loads a program image from the specified boot device
• Transfers control to the loaded image
E.3.3.1 Syntax
Here is the syntax of the boot command (broken across multiple lines for
display purposes):
>>> boot [-file filename] [-flags longword[,longword]]
[-protocols enet_protocol] [-halt] [boot_device]
E.3.3.2 Options
Table E–3 describes the boot command options.
Table E–3 boot Command Options
Command Option Description
–file filename A file name to load into the system. For booting
from Ethernet, the file name is limited to 15
characters. Use the set boot_file command to
set an environment variable that specifies a default
boot file.
–flags longword [,longword] Additional information for the operating system. For
Digital UNIX systems, valid values are:
i Interactive boot
s Boot to single user mode
A Autoboot to multiuser mode
Use the set boot_osflags command to set an
environment variable that specifies a default boot flag
value.
–protocols enet_protocol An Ethernet protocol(s) that will be used for a network
boot. Valid values are:
mop
bootp
–halt After the image is loaded and the page tables and
other data structures are set up, forces the bootstrap
operation to halt and invoke the console program.
boot_device A device path or list of devices that the firmware will
attempt to boot. Use the
set bootdef_dev command to set the default boot
device environment variable.
E–5