On tape boots, the ISL is loaded directly by the processor-dependent
code (PDC). ISL reads the logical interchange format (LIF) directory
from tape and uses this directory to find other files on the tape.
On disk boots, the PDC and IODC boot the utility MMSAVE, which in turn
boots the ISL. PDC and IODC read the first record or sector
of the boot device, which is the LIF label. The LIF label
contains a pointer to the LIF directory which contains a pointer to
the MMSAVE boot image. PDC reads and launches MMSAVE.
MMSAVE writes a 16-megabyte, (32 megabyte for 99x system,
64 MB for N-Class and A-Class systems) section of main memory to the
DUMPAREA file, whose address is found in the LIF directory.
This allows memory space for the ISL and DUMP utilities to be
loaded. MMSAVE boots ISL, which then uses the LIF label to
find the LIF directory. As a last step, ISL uses the
directory to find other files it needs.
The system displays messages indicating the completion of
the booting and loading routines as they occur.
Using Initial System Loader (ISL) Commands
ISL commands change or display boot path information and ISL utility names.
Table 3-1 "ISL Commands" lists commands
that do not execute a utility function. ISL utilities and options are described
later in this chapter.
Table 3-1 ISL Commands
Command
Meaning
HELP
Help Facility
LS
List ISL utilities
AUTOBOOT
Set or clear autoboot flag in stable storage
AUTOSEARCH
Set or clear autosearch flag in stable storage
PRIMPATH
Modify primary boot path in stable storage
ALTPATH
Modify alternate boot path in stable storage
CONSPATH
Modify system console path in stable storage
DISPLAY
Display boot and console paths in stable storage
LSAUTOFL
List contents of autoboot file
FASTSIZE
Sets or displays FASTSIZE
800SUPPORT
Boots the s800 Support Kernel from the boot device
Example 3-1 demonstrates using the ISL command, HELP. To display help
listings for all ISL commands, enter either HELP, HE, or the
symbol "?" at the ISL prompt: The display on your screen may vary
depending on the model of HP 3000 you have.
Example 3-1 Using the HELP Command
ISL> HE
HELP Help Facility
LS List ISL utilities
AUTOBOOT Set or clear autoboot flag in stable storage
AUTOSEARCH Set or clear autosearch flag in stable storage
PRIMPATH Modify primary boot path in stable storage
ALTPATH Modify alternate boot path in stable storage
CONSPATH Modify system console path in stable storage
DISPLAY Display boot and console paths in stable storage
LSAUTOFL List contents of autoboot file
FASTSIZE Sets or displays FASTSIZE
800SUPPORT Boots the s800 Support Kernel from the boot device
700SUPPORT Boot the s700 Support Kernel from the boot device
READNVM Displays contents of one word of NVM
READSS Displays contents of one word of stable storage
LSBATCH List contents of batch file
BATCH Execute commands in batch file
LSEST List contents of EST (Extended Self Test) file
EST Execute commands in EST (Extended Self Test) file
Enter 'LS' to see a list of the ISL utilities.ISL>
NOTE: The list of ISL utilities differs, depending upon whether
they have been loaded from tape or disk and upon which model of
HP e3000 you have. The utilities listed in Example 3-2 were loaded from disk.
Listing Available ISL Utilities
Example 3-2 demonstrates using the ISL LS command to display available
ISL utilities. To generate a list of the utilities available on the boot medium,
enter LISTF or LS at the ISL prompt.
Example 3-2 Listing Available ISL Utilities