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Initial System Loader (ISL)

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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
AUTOSEARCHSet 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
800SUPPORTBoots the s800 Support Kernel from the boot device
700SUPPORTBoot 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

For more information on the contents of stable storage and NVM, refer to Appendix C Reading Stable Storage and Nonvolatile Memory

Using the Help Facility for ISL Commands

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 

  ISL> ls

   Utilities on this system are:
  
  filename   type   start    size     created
  =====================================================
  ISL        -12864 1327872  306      00/09/22 06:30:57
  START      -12864 4955600  52168    00/10/20 05:14:01
  DISCUTIL   -12864 1533952  22328    00/10/20 05:09:44
  SAT        -12864 4902192  29512    00/10/20 05:11:18
  DUMP       -12864 4935216  20344    00/10/20 05:10:01
  STAGEISL   -12864 1502208  20552    00/10/20 05:11:35
  A1002AI    -12864 677584   688      00/02/12 08:35:10
  A1002AM    -12864 678272   512      00/02/12 08:35:13
  A1002AP    -12864 678784   3744     00/02/12 08:35:16
  A1100AI    -12864 682528   1120     00/03/07 16:19:51
  A1100AM    -12864 683648   752      00/03/07 16:19:51
  A1100AP    -12864 684400   3568     00/03/07 16:20:01
  EDBC       -12864 689696   1696     00/09/25 05:16:23
  EDPROC     -12864 1370544  6951     00/09/25 05:16:25
  MDIAG      -12864 697344   6256     00/09/25 05:16:27
  MPROC      -12864 703600   1152     00/09/25 05:16:28
  ODE        -12864 662528   848      00/09/25 05:16:28
  ODEDATA    -12864 663376   13296    00/09/25 05:16:32
  TDIAG      -12864 499712   7216     00/09/25 05:16:37
     Hit Return to continue.
  filename   type   start    size     created
  =====================================================
  UNIPROC    -12864 506928   3488     00/09/25 05:16:38
  BCDIAG     -12864 510416   704      00/02/12 08:36:27
  CAEXR      -12864 511120   672      00/02/12 08:36:30
  XMAP       -12864 511792   1568     00/02/12 08:36:36
  CLKUTIL    -12864 513360   352      00/10/20 02:32:08
  SADPATCH   -12864 513712   784      00/10/20 02:32:14
  ODEDATA2   -12864 1454928  7712     00/09/25 05:16:35

  ISL>



Chapter 3 System Startup Functions

Activating and Deactivating Autoboot and Autosearch Functions