isl

isl - Initial System Loader (isl) overview.

 isl(1M)                       Series 800 Only                       isl(1M) NAME      isl - initial system loader DESCRIPTION      isl implements the operating system independent portion of the      bootstrap process.  It is loaded and executed after self-test and      initialization have completed successfully.      The processor contains special purpose memory for maintaining critical      configuration related parameters (e.g. Primary Boot, Alternate Boot,      and Console Paths).  Two forms of memory are supported: Stable Storage      and Non-Volatile Memory (NVM).      Typically, when control is transferred to isl, an autoboot sequence      takes place.  An autoboot sequence allows a complete bootstrap      operation to occur with no intervention from an operator.  isl      executes commands from the autoexecute file in a script-like fashion.      autoboot is enabled by a flag in Stable Storage.      autosearch is a mechanism that automatically locates the boot and      console devices.  For further information, see pdc(1M).      During an autoboot sequence, isl displays its revision and the name of      any utility it executes.  However, if autoboot is disabled, after isl      displays its revision, it then prompts for input from the console      device.  Acceptable input is any isl command name or the name of any      utility available on the system.  If a non-fatal error occurs or the      executed utility returns, isl again prompts for input.    Commands      There are several commands available in isl. The following is a list      with a short description.  Parameters may be entered on the command      line following the command name.  They must be separated by spaces.      isl prompts for any necessary parameters that are not entered on the      command line.           ?           help           Help - List commands and available utilities           listf           ls             List available utilities           autoboot       Enable or disable the autoboot sequence                          Parameter - on or off           autosearch     Enable or disable the autosearch sequence                          Parameter - on or off           primpath       Modify the Primary Boot Path                          Parameter - Primary Boot Path in decimal           altpath        Modify the Alternate Boot Path                          Parameter - Alternate Boot Path in decimal           conspath       Modify the Console Path                          Parameter - Console Path in decimal           lsautofl           listautofl     List contents of the autoexecute file           display        Display the Primary Boot, Alternate Boot, and                          Console Paths           readnvm        Display the contents of one word of NVM in                          hexadecimal                          Parameter - NVM address in decimal or standard                          hexadecimal notation           readss         Display the contents of one word of Stable Storage                          in hexadecimal                          Parameter - Stable Storage address in decimal or                          standard hexadecimal notation DIAGNOSTICS      isl displays diagnostic information through error messages written on      the console and display codes on the LED display.      For the display codes, CE0x are informative only.  CE1x and CE2x      indicate errors, some of which are fatal and cause the system to halt.      Other errors merely cause isl to display a message.      Non-fatal errors during an autoboot sequence cause the autoboot      sequence to be aborted and isl to prompt for input.  After non-fatal      errors during an interactive isl session, isl merely prompts for      input.      Fatal errors cause the system to halt.  The problem must be corrected      and the system RESET to recover.      CE00   isl is executing.      CE01   isl is autobooting from the autoexecute file.      CE02   Cannot find an autoexecute file.  autoboot aborted.      CE03   No console found, isl can only autoboot.      CE05   Directory of utilities is too big, isl reads only 2K bytes.      CE06   autoexecute file is inconsistent.  autoboot aborted.      CE07   Utility file header inconsistent: SOM values invalid.       CE08   autoexecute file input string exceeds 2048 characters.  autoboot aborted.      CE09   isl command or utility name exceeds 10 characters.      CE0F   isl has transferred control to the utility.      CE10   Internal inconsistency: Volume label - FATAL.      CE11   Internal inconsistency: Directory - FATAL.      CE12   Error reading autoexecute file.      CE13   Error reading from console - FATAL.      CE14   Error writing to console - FATAL.      CE15   Not an isl command or utility.      CE16   Utility file header inconsistent: Invalid System ID.      CE17   Error reading utility file header.      CE18   Utility file header inconsistent: Bad magic number.      CE19   Utility would overlay isl in memory.      CE1A   Utility requires more memory than is configured.      CE1B   Error reading utility into memory.      CE1C   Incorrect checksum: Reading utility into memory.      CE1D   Console needed - FATAL.      CE1E   Internal inconsistency: Boot device class - FATAL.      CE21   Destination memory address of utility is invalid.      CE22   Utility file header inconsistent: pdc_cache entry.      CE23   Internal inconsistency: iodc_entry_init - FATAL.      CE24   Internal inconsistency: iodc_entry_init - console - FATAL.      CE25   Internal inconsistency: iodc_entry_init - boot device - FATAL.      CE26   Utility file header inconsistent: Bad aux_id.      CE27   Bad utility file type. SEE ALSO      boot(1M), hpux_800(1M), pdc(1M).