User`s guide

Data Structures and Memory Layout
C.2 Restart Parameter Block
Table C–2 (Cont.) Restart Parameter Block Fields
(R11)+ Field Name Description
10: RPB$L_HALTPC R10 on entry to VMB (HALT PC).
10: RPB$L_HALTPSL PR$_SAVPSL on entry to VMB (HALT PSL).
18: RPB$L_HALTCODE AP on entry to VMB (HALT CODE).
1C: RPB$L_BOOTR0 R0 on entry to VMB.
Note
The field RPB$W_R0UBVEC, which overlaps the high-order word of
RPB$L_BOOTR0, is set by the boot device drivers to the SCB offset (in
the second page of the SCB) of the interrupt vector for the boot device.
20: RPB$L_BOOTR1 VMB version number. The high-order word of
the version is the major ID and the low-order
word is the minor ID.
24: RPB$L_BOOTR2 R2 on entry to VMB.
28: RPB$L_BOOTR3 R3 on entry to VMB.
2C: RPB$L_BOOTR4 R4 on entry to VMB.
Note
The 48-bit booting node address is stored in RPB$L_BOOTR3 and
RPB$L_BOOTR4 for compatibility with ELN VX.X. (This field is only
initialized this way when performing a network boot.)
30: RPB$L_BOOTR5 R5 on entry to VMB.
34: RPB$L_IOVEC Physical address of boot driver’s I/O vector of
transfer addresses.
38: RPB$L_IOVECSZ Size of BOOT QIO routine.
3C: RPB$L_FILLBN LBN of secondary bootstrap image.
40: RPB$L_FILSIZ Size of secondary bootstrap image in blocks.
(continued on next page)
C–6 Data Structures and Memory Layout