eeprom — display
or modify contents of the EEPROM or OpenPROM
eeprom |
[-cipv] [-f
device] [-N
system]
[field[=value]
...] |
eeprom provides an interface for
displaying and changing the contents of the EEPROM or OpenPROM. Without any
arguments, eeprom will list all of the known fields
and their corresponding values. When given the name of a specific field,
eeprom will display that value or set it if the
field name is followed by ‘=’ and a value. Only the superuser
may modify the contents of the EEPROM or OpenPROM.
The options are as follows:
-- Commands are taken from stdin and displayed on stdout.
-ceeprom will fix incorrect checksum values and
exit. This flag is quietly ignored on systems with an OpenPROM.-f
device- On systems with an EEPROM, use device instead of the
default /dev/eeprom. On systems with an OpenPROM,
use device instead of the default
/dev/openprom.
-i- If checksum values are incorrect,
eeprom will
ignore them and continue after displaying a warning. This flag is quietly
ignored on systems with an OpenPROM.
-N
system- Use the system image system instead of the default
/bsd.
-p- On systems with an OpenPROM, display the tree derived from it and exit.
This flag is quietly ignored on systems with an EEPROM.
-v- On systems with an OpenPROM, be verbose when setting a value. Systems with
an EEPROM are always verbose.
The following fields and values are for systems with an
EEPROM:
- hwupdate
- A valid date, such as “7/12/95”. The strings
“today” and “now” are also acceptable.
- memsize
- How much memory, in megabytes, is installed in the system.
- memtest
- How much memory, in megabytes, is to be tested upon power-up.
- scrsize
- The size of the screen. Acceptable values are “1024x1024”,
“1152x900”, “1600x1280”, and
“1440x1440”.
- watchdog_reboot
- If true, the system will reboot upon reset. Otherwise, the system will
fall into the monitor.
- default_boot
- If true, the system will use the boot device stored in
bootdev.
- bootdev
- Specifies the default boot device in the form cc(x,x,x), where
“cc” is a combination of two letters such as
“sd” or “le” and each “x” is a
hexadecimal number between 0 and ff, less the prepending
“0x”.
- kbdtype
- This value is “0” for all Sun keyboards.
- console
- Specifies the console type. Valid values are “b&w”,
“ttya”, “ttyb”, “color”, and
“p4opt”.
- keyclick
- If true, the keys click annoyingly.
- diagdev
- This is a string very similar to that used by
bootdev. It specifies the default boot device when
the diagnostic switch is turned on.
- diagpath
- A 40-character, NULL-terminated string specifying the kernel or
stand-alone program to load when the diagnostic switch is turned on.
- columns
- An 8-bit integer specifying the number of columns on the console.
- rows
- An 8-bit integer specifying the number of rows on the console.
- ttya_use_baud
- Use the baud rate stored in ttya_baud instead of the
default 9600.
- ttya_baud
- A 16-bit integer specifying the baud rate to use on ttya.
- ttya_no_rtsdtr
- If true, disables RTS/DTR.
- ttyb_use_baud
- Similar to ttya_use_baud, but for ttyb.
- ttyb_baud
- Similar to ttya_baud, but for ttyb.
- ttyb_no_rtsdtr
- Similar to ttya_no_rtsdtr, but for ttyb.
- banner
- An 80-character, NULL-terminated string to use at power-up instead of the
default Sun banner.
Note that the secure,
bad_login, and password fields
are not currently supported.
Since the OpenPROM is designed such that the field names are
arbitrary, explaining them here is dubious. Below are field names and values
that one is likely to see on a system with an OpenPROM. NOTE: this list may
be incomplete or incorrect due to differences between revisions of the
OpenPROM.
- sunmon-compat?
- If true, the old EEPROM-style interface will be used while in the monitor,
rather than the OpenPROM-style interface.
- selftest-#megs
- A 32-bit integer specifying the number of megabytes of memory to test upon
power-up.
- oem-logo
- A 64bitx64bit bitmap in Sun Iconedit format. To set the bitmap, give the
pathname of the file containing the image. NOTE: this property is not yet
supported.
- oem-logo?
- If true, enables the use of the bitmap stored in
oem-logo rather than the default Sun logo.
- oem-banner
- A string to use at power-up, rather than the default Sun banner.
- oem-banner?
- If true, enables the use of the banner stored in
oem-banner rather than the default Sun banner.
- ttya-mode
- A string of five comma separated fields in the format
“9600,8,n,1,-”. The first field is the baud rate. The second
field is the number of data bits. The third field is the parity;
acceptable values for parity are “n” (none),
“e” (even), “o” (odd), “m”
(mark), and “s” (space). The fourth field is the number of
stop bits. The fifth field is the “handshake” field;
acceptable values are “-” (none), “h”
(RTS/CTS), and “s” (XON/XOFF).
- ttya-rts-dtr-off
- If true, the system will ignore RTS/DTR.
- ttya-ignore-cd
- If true, the system will ignore carrier detect.
- ttyb-mode
- Similar to ttya-mode, but for ttyb.
- ttyb-rts-dtr-off
- Similar to ttya-rts-dtr-off, but for ttyb.
- ttyb-ignore-cd
- Similar to ttya-ignore-cd, but for ttyb.
- sbus-probe-list
- Four digits in the format “0123” specifying which order to
probe the SBus at power-up. It is unlikely that this value should ever be
changed.
- screen-#columns
- An 8-bit integer specifying the number of columns on the console.
- screen-#rows
- An 8-bit integer specifying the number of rows on the console.
- boot-device
- Space separated list of device aliases or device paths to boot from, in
the given order.
- boot-file
- File to boot. The empty string lets the second-stage boot program
ofwboot choose
the default.
- auto-boot?
- If true, the system will boot automatically at power-up.
- watchdog-reboot?
- If true, the system will reboot upon reset. Otherwise, the system will
fall into the monitor.
- input-device
- One of the strings “keyboard”, “ttya”, or
“ttyb” specifying the default console input device.
- output-device
- One of the strings “screen”, “ttya”, or
“ttyb” specifying the default console output device.
- keyboard-click?
- If true, the keys click annoyingly.
- sd-targets
- A string in the format “31204567” describing the translation
of physical to logical target.
- st-targets
- Similar to sd-targets, but for tapes. The default
translation is “45670123”.
- scsi-initiator-id
- The SCSI ID of the on-board SCSI controller.
- hardware-revision
- A 7-character string describing a date, such as
“25May95”.
- last-hardware-update
- Similar to hardware-revision, describing when the
CPU was last updated.
- diag-switch?
- If true, the system will boot and run in diagnostic mode.
- local-mac-address?
- When set to
false, all
Ethernet devices will use the same system default MAC address. When
true,
Ethernet devices which have a unique MAC address will use it rather than
the system default MAC address. This option only really affects
FCode-based Ethernet devices. On Sparc64, all on-board devices, as well as
plug-in hme(4) boards, will respect this
setting; other hardware will not.
- /dev/eeprom
- the EEPROM device on systems with an EEPROM
- /dev/openprom
- the OpenPROM device on systems with an OpenPROM
The fields and their values are not necessarily well defined on
systems with an OpenPROM. Your mileage may vary.
There are a few fields known to exist in some revisions of the
EEPROM and/or OpenPROM that are not yet supported. Most notable are those
relating to password protection of the EEPROM or OpenPROM.
Avoid gratuitously changing the contents of the EEPROM. It has a
limited number of write cycles.
The date parser isn't very intelligent.