Instruction manual

16.2 Console Saved State
Table 53 lists the saved information after console program entry.
Table 53 Console Saved State
Register Name(s) Meaning
R0-R31 General purpose registers
F0-F31 Floating point registers
PT0-PT31 PAL temporary registers
EXC_ADDR Exception address
PAL_BASE PALcode base address
HIRR Hardware interrupt request register
HIER Hardware interrupt enable registers
MM_CSR Memory management CSR
VA Virtual address register
BIU_ADDR BIU address register
BIU_STAT BIU status register
DC_ADDR Dcache address register
FILL_SYNDROME ECC syndrome register
BC_TAG Backup cache tag
CONSOLE_ENTERED Flag to tell whether data came from console
16.3 Console Program
The ROM code includes console support. This section covers the operator
interface to the console program (also called halt mode). The command line
parser conforms to the commands described in Section 16.4.
The console program operates the built-in video/keyboard terminal or an attached
terminal connected through a serial port, as discussed in Section 16.1,
16.3.1 Entering and Exiting From Console Mode
Normal operation is in program mode (also called program I/O mode). The mode
is set to console mode by one of the methods described in Section 14.5.
The console mode is exited when the operator issues the BOOT, START, or
CONTINUE console commands. If power fails while the DEC 3000 AXP is
operating in console mode, it enters the power-off state and loses the contents of
memory and registers, except those of the nonvolatile RAM.
16–4 Console