isl(1M) 																   isl(1M)

NAME

       isl - initial system loader

DESCRIPTION

       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 an sequence takes place.	An sequence allows a complete bootstrap operation to occur with no
       intervention from an operator.  executes commands from the file in a script-like fashion.  is enabled by a flag in Stable Storage.

       is a mechanism that automatically locates the boot and console devices.	For further information, see pdc(1M).

       During an sequence, displays its revision and the name of any utility it executes.  However, if is disabled, after displays  its  revision,
       it  then  prompts for input from the console device.  Acceptable input is any command name or the name of any utility available on the sys-
       tem.  If a non-fatal error occurs or the executed utility returns, again prompts for input.

   Commands
       There are several commands available in although not all commads are supported on cellular systems .  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.  prompts for any
       necessary parameters that are not entered on the command line.

	      Help - List commands and available utilities

	      List available utilities

	      Enable or disable the
			     autoboot sequence

			     Parameter - or

	      Enable or disable the
			     sequence

			     Parameter - or

	      Modify the Primary Boot Path

			     Parameter - Primary Boot Path in decimal

	      Modify the Alternate Boot Path

			     Parameter - Alternate Boot Path in decimal

	      Modify the Console Path

			     Parameter - Console Path in decimal

	      List contents of the
			     file

	      Display the Primary Boot, Alternate Boot, and Console Paths

	      Display the contents of one word of NVM in hexadecimal

			     Parameter - NVM address in decimal or standard hexadecimal notation

	      Display the contents of one word of Stable Storage in hexadecimal

			     Parameter - Stable Storage address in decimal or standard hexadecimal notation

DIAGNOSTICS

       displays diagnostic information through error messages written on the console and display codes on the LED display.

       For the display codes, are informative only.  and indicate errors, some of which are fatal and cause the  system  to  halt.   Other  errors
       merely cause to display a message.

       Non-fatal errors during an sequence cause the sequence to be aborted and to prompt for input.  After non-fatal errors during an interactive
       session, merely prompts for input.

       Fatal errors cause the system to halt.  The problem must be corrected and the system RESET to recover.

	      is executing.

	      is      from the file.

	      Cannot find an
		      file.  aborted.

	      No console found,
		      can only

	      Directory of utilities is too big,
		      reads only 2K bytes.

	      file is inconsistent.
		      aborted.

	      Utility file header inconsistent: SOM values invalid.

	      file input string exceeds 2048 characters.
		      aborted.

	      command or utility name exceeds 10 characters.

	      has transferred control to the utility.

	      Internal inconsistency: Volume label -

	      Internal inconsistency: Directory -

	      Error reading
		      file.

	      Error reading from console -

	      Error writing to console -

	      Not an  command or utility.

	      Utility file header inconsistent: Invalid System ID.

	      Error reading utility file header.

	      Utility file header inconsistent: Bad magic number.

	      Utility would overlay
		      in memory.

	      Utility requires more memory than is configured.

	      Error reading utility into memory.

	      Incorrect checksum: Reading utility into memory.

	      Console needed -

	      Internal inconsistency: Boot device class -

	      Destination memory address of utility is invalid.

	      Utility file header inconsistent:
		      pdc_cache entry.

	      Internal inconsistency:
		      iodc_entry_init -

	      Internal inconsistency:
		      iodc_entry_init - console -

	      Internal inconsistency:
		      iodc_entry_init - boot device -

	      Utility file header inconsistent: Bad
		      aux_id.

	      Bad utility file type.

SEE ALSO

       boot(1M), pdc(1M).

							       PA-RISC Systems Only							   isl(1M)