DEC 4000 600 series Owner's Manual page 89

Boot Flag Settings
Possible boot flags settings and their meanings for OpenVMS
AXP systems are:
Flag Setting Bit Number
1 0
2 1
4 2
8 3
10 4
20 5
80 7
100 8
10000 16
20000 17
For more information about boot flags, refer to OpenVMS Alpha
Version 1.0 Upgrade and Installation Manual (AA–PQYSA–TE).
Setting Boot Flags (boot_osflags)
Meaning
Bootstrap conversationally (enables
you to modify SYSGEN parameters
in SYSBOOT).
Map XDELTA to running system.
Stop at initial system breakpoint.
Perform diagnostic bootstrap.
Stop at the bootstrap breakpoints.
Omit header from secondary
bootstrap image.
Prompt for the name of the
secondary bootstrap file.
Halt before secondary bootstrap.
Display debug messages during
booting.
Display user messages during
booting.
Setting Environment Variables 4–11