Vax 613 0S Instruction Manual Page 310

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Table 66 (Cont.) NVR Storage Allocation
Address
Dense I/O Space Name Description See
1.E020.00C4-00FC BOOT_DEV Default boot device (15
bytes)
Section 19.13
19.1 NVR Console Mailbox Register
Figure 32 shows the NVR console mailbox register (CPMBX). Table 67 lists its
fields.
Figure 32 NVR Console Mailbox Register (CPMBX)
TRIG MOP HLT_SWX
FAST_
SCSI_B
FAST_
SCSI_A
HLT_ACT
0007
MLO-012124
Table 67 NVR Console Mailbox Register Fields
TRIG TRIGGER (bit <7>). Indicates that remote triggers are allowed and
that the trigger password can be changed. If set to 1, remote trigger is
allowed and the network trigger password can be set.
MOP MOP (bit <6>). Enables or disables the MOP listener. If set to 1, all
MOP listener functions are enabled.
HLT_SWX Halt Switch (bits <5:4>); permanently encodes the action the console
is to take, when internally-generated processor halts occur. Examples
of externally-generated halts are those initiated by a user pressing the
Break or Halt button.
The actions that can be taken on internally-generated halts are:
0 Restart; if that fails, boot; if that fails, halt.
1 Restart; if that fails, boot; if that fails, halt.
2 Boot; if that fails, halt.
3 Halt.
At power on, a restart halt action (HLT_ACT = 0 or 1) is treated as a
Boot request. This field is set to two (Boot/Halt) when a NVR failure is
detected at power on. This field may be inspected and modified using the
SHOW/SET HALT console commands. At entry to the console, this value
is moved to the HLT_ACT field.
FAST_SCSI_B Fast SCSI (bit<3>) for B bus. When = 1, fast SCSI for B bus is enabled.
FAST_SCSI_A Fast SCSI (bit<2>) for A bus.
(continued on next page)
19–2 Nonvolatile RAM
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