Digital Equipment DEC 10000, Service Manual

Page: 28 / 70

2-2 Servicing the CPU
2.1 System Parameters
Several system parameters must be set during repair or when add-
ing CPUs. Other system parameters may require setting depend-
ing upon how the customer wants the system configured.
Table 2-1 EEPROM Environment Variables
(Table 2-1 continued on page 2-4)
Environment
Variable
Default
Value Variable Description
auto_action Halt Specifies the action the system will take follow-
ing an error halt. Values are:
restart
- Automatically restart. If restart
fails, boot the operating system.
boot
- Automatically boot the operating sys-
tem.
halt
- Enter console mode.
baud 9600 Sets the console terminal baud rate. Allowable
values are
300
,
600
,
1200
,
2400
,
4800
, and
9600
.
boot_file
Null The default file name used for the primary
bootstrap when no file name is specified by the
boot command.
boot_osflags Null Operating system flags used for booting the OS
in specific ways, if none are specified by the
boot command with the -flags qualifier.
boot_reset Off or On Resets system and displays self-test results
during booting. Default is off for VAX 10000
and on for DEC 10000.
bootdef_dev The default device or device list from which
booting is attempted when no device name is
specified by the
boot
command.
cpu
n Node ID of the primary (n = 0 , 1 , 2 , 3 ).