User`s guide

o AUTO/RESTART Switch Set to BOOT Sequence - Setting the AUTO/RESTART switch to
the
BOOT position, while the CPU is in the console I/O mode wait loop, causes the console
subsystem to perform the following sequence of events:
e
• Print the message ATTEMPTING SYSTEM BOOT on the console terminal.
• Examine the cold start flag. If the flag is set, indicating a cold start has previously been
attempted, the message
SYSTEM BOOT FAILED is printed on the console terminal. The
CPU then enters the console I/O mode wait loop. However, if the cold start flag is not set,
indicating that a cold
start has not been attempted, the console subsystem sets the cold
start flag.
• Execute the indirect command file (XXXBOO.CMD) associated with the type of cold
start to be performed. This file executes the functions necessary to cold start
the operating
system.
Console I/O Mode Diagnostic Supervisor BOOT Command Sequence - Typing the console
I/O mode BOOT command for the diagnostic supervisor causes the console subsystem to
perform the following sequence
of events:
• Set the cold start flag.
• Execute the indirect command file (XXXBOO.CMD) associated with the type of cold
start to be performed. This file executes the functions necessary to cold start the diagnostic
supervisor.
G XXXBOO.CMD Execution Sequence - The indirect command file executed by the cold start
sequence performs the appropriate functions to cold start either the operating system or
diagnostic supervisor. The name
of this file reflects the instructions contained within it.
The name of this file is in the following format:
XXXBOO.CMD
where XXXBOO describes the cold start device and whether the file cold starts the operating
system or diagnostic supervisor. For example:
DQOBOO.CMD
Cold starts
the
operating system from DQAO.
DUOBOO.CMD
Cold starts the
operating system fromDUAO.
DJOBOO.CMD
Cold starts the
operating
system
fromDJAO.
SQ1BOO.CMD
Cold
starts the
diagnostic
supervlsorfrom
DQA1.
SU1BOO.CMD
Cold starts
the
diagnostic supervisorfrom
DUA 1.
SJ1BOO.CMD
Cold
starts the
diagnostic sup e r v 1 s 0 r from
DJA 1.
DEFBOO.CMD
Cold
starts the
operating system
from the
default
system
device
(DQAO,
DJAO,
orDUAO).
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