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                The Boot Utility (BOO)




1.0  INTRODUCTION TO BOO


The Boot task (BOO) is a program that allows the user to boot a  new
system image from disk, floppys, or DECtape.




2.0  COMMAND SYNTAX


BOO may be invoked by using the PARSER's RUN command as follows:


     RUN BOO

BOO will then prompt the user for a file specification that the user
wishes to boot.  The file specification is of the form:


     dev:[group,member]filename.ext;version




3.0  ERROR MESSAGES


BOO -- DPB ERROR

        A bad DPB was created by PARSER. This error indicates that
        the system itself has faulted.


BOO -- FILE NOT CONTIGUOUS

        An attempt was made to load a system from a noncontiguous
        file. System images must be contiguous.


BOO -- INVALID LOAD DEVICE

        BOO detected a device that was invalid as a system
        resident device.


BOO -- LABEL BLOCK READ ERROR

        BOO could not read the label block of the system image.

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BOO -- NO TRANSFER ADDRESS

        BOO could not find a transfer address in a virgin system
        image (result of a task build).


BOO -- NOT SYSTEM IMAGE

        BOO determined that the file is not a system image.


BOO -- FILE NOT FOUND

        BOO could not find the file the user specified.


BOO -- DEVICE NOT MOUNTED

        The device specified by the user was not mounted.


BOO -- SYNTAX ERROR

        A command was entered that does not follow syntax rules.


BOO -- PRIVILEGED COMMAND

        A user running BOO under RSX20F should never encounter this
        error.


BOO -- DEVICE NOT IN SYSTEM

        The device the user specified is not in the system.


BOO -- PRIMARY PROTOCOL RUNNING

        The user tried to boot a new system while primary protocol
        was running. This is illegal.