Data Structures and Memory Layout
D.2 Restart Parameter Block (RPB)
Table D–2 (Cont.) Restart Parameter Block Fields
(R11)+ Field Name
Description
68:
RPB$T_FILE
Name of secondary bootstrap image (defaults to
[SYS0.SYSEXE]SYSBOOT.EXE). This field (up to
40 bytes) is overwritten with the input string on a
‘‘solicit’’ boot.
Note
1: For VAX/OpenVMS, the
RPB$T_FILE must contain
the root directory string
"SYSn." on a non-network
bootstrap. This string
is parsed by SYSBOOT
(SYSBOOT does not use
the high nibble of BOOTR5).
2: The RPB$T_FILE is
overwritten to contain
the boot node name for
compatibility with ELN V1.1
(this field is only initialized
this way when performing a
network boot).
90:
RPB$B_CONFREG
Array (16 bytes) of adapter types (NDT$_UB0 -
UNIBUS).
A0:
RPB$B_HDRPGCNT
Count of header pages.
A1:
RPB$W_BOOTNDT
Boot adapter nexus device type. Used by
SYSBOOT and INIADP (OF SYSLOA) to configure
the adapter of the boot device (changed from a
byte to a word field in Version 12 of VMB).
B0:
RPB$L_SCBB
Physical address of SCB.
BC:
RPB$L_MEMDSC
Count of pages in physical memory including
both good and bad pages. The high 8 bits of this
longword contain the TR #, which is always 0 for
KA681/KA691/KA692/KA694.
(continued on next page)
Data Structures and Memory Layout D–9
