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SRM Console A-3
a flag-word at offset 496, which is always 0, and a checksum at offset 504. The
checksum is simply the sum of the first 63 long integers in the first sector.
If the checksum in the first sector is correct, SRM goes ahead and reads the size
sectors starting from the sector given in the sector number field and places them in
virtual memory at address 0x20000000. If the reading completes successfully,
SRM performs a jump to address 0x20000000.
A.2 Invoking the SRM Console
When a system is powered up, the SRM console runs and either remains
running or passes control to another console or an operating system. If
the system is already running, invoke the SRM console by shutting down
the operating system or by pressing the Halt button under the front bezel.
If you are running Tru64 UNIX operating system
• The preferred method to invoke the SRM console is to shut down the operating
system according to the procedure described in your operating system
documentation.
• An alternative method is to press the Halt button. See Figure 1-3.
Following one of these steps, the console prompt, >>>, will be displayed. You are
now at the SRM console.
If you are running Linux
To switch to the SRM console, power cycle the system. The SRM console will boot.