eeprom(1M)

NAME

eeprom − EEPROM display and load utility

SYNOPSIS

/usr/platform/platform-name/sbin/eeprom [−] [−f device ] [parameter[=value] ...]

DESCRIPTION

eeprom displays or changes the values of parameters in the EEPROM. On x86 machines, EEPROM storage is simulated using a file residing in the platform specific boot area. It processes parameters in the order given. When processing a parameter accompanied by a value, eeprom makes the indicated alteration to the EEPROM; otherwise it displays the parameter’s value. When given no parameter specifiers, eeprom displays the values of all EEPROM parameters. A ‘−’ (hyphen) flag specifies that parameters and values are to be read from the standard input (one parameter or parameter=value per line).

Only the super-user may alter the EEPROM contents.

eeprom verifies the EEPROM checksums and complains if they are incorrect.

platform-name is the name of the platform implementation and can be found using the −i option of uname(1).

OPTIONS

−f device Use device as the EEPROM device.

x86 OPTIONS

−I Initialize boot properties on x86. Only init(1M) run-level initialization scripts should use this option.

NVRAM CONFIGURATION PARAMETERS

Not all OpenBoot systems support all parameters. Defaults may vary depending on the system and the PROM revision.

auto-boot? If true, boot automatically after power-on or reset. Defaults to true.

ansi-terminal? Configuration variable used to control the behavior of the terminal emulator. The value false makes the terminal emulator stop interpreting ANSI escape sequences, instead just echoing them to the output device. Default value: true.

boot-command Command executed if auto-boot? is true. Default value is boot.

boot-device Device from which to boot. boot-device may contain 0 or more device specifiers separated by spaces. Each device specifier may be either a prom device alias or a prom device path. The boot prom will attempt to open each successive device specifier in the list beginning with the first device specifier. The first device specifier which opens successfully will be used as the device to boot from. Defaults to disk net.

boot-file File to boot (an empty string lets the secondary booter choose default). Defaults to empty string.

boot-from Boot device and file (OpenBoot PROM version 1.x only). Defaults to vmunix.

boot-from-diag Diagnostic boot device and file (OpenBoot PROM version 1.x only). Defaults to le()unix.

diag-device Diagnostic boot source device. Defaults to net.

diag-file File from which to boot in diagnostic mode. Defaults to empty string.

diag-level Diagnostics level. Values include off, min, max and menus. There may be additional platform-specific values. When set to off, POST is not called. If POST is called, the value is made available as an argument to, and is interpreted by POST. The default value is platform-dependent.

diag-switch? If true, run in diagnostic mode. Defaults to true.

fcode-debug? If true, include name parameter for plug-in device FCodes. Defaults to false.

hardware-revision System version information.

input-device Input device used at power-on (usually keyboard, ttya, or ttyb). Defaults to keyboard.

keyboard-click? If true enable keyboard click. Defaults to false.

keymap Keymap for custom keyboard.

last-hardware-update System update information.

load-base Default load address for client programs. Default value is 16384.

local-mac-address? If true, network drivers use their own MAC address, not system’s. Defaults to false.

mfg-mode Manufacturing mode argument for POST. Possible values include off or chamber. The value is passed as an argument to POST. Default value: off.

mfg-switch? If true, repeat system self-tests until interrupted with STOP-A. Defaults to false.

nvramrc Contents of NVRAMRC. Defaults to empty.

oem-banner Custom OEM banner (enabled by setting oem-banner? to true). Defaults to empty string.

oem-banner? If true, use custom OEM banner. Defaults to false.

oem-logo Byte array custom OEM logo (enabled by setting oem-logo? to true). Displayed in hexadecimal.

oem-logo? If true, use custom OEM logo (else, use Sun logo). Defaults to false.

output-device Output device used at power-on (usually screen, ttya, or ttyb). Defaults to screen.

sbus-probe-list Which SBus slots are probed and in what order. Defaults to 0123.

screen-#columns Number of on-screen columns (characters/line). Defaults to 80.

screen-#rows Number of on-screen rows (lines). Defaults to 34.

scsi-initiator-id SCSI bus address of host adapter, range 0-7. Defaults to 7.

sd-targets Map SCSI disk units (OpenBoot PROM version 1.x only). Defaults to 31204567, which means that unit 0 maps to target 3, unit 1 maps to target 1, and so on.

security-#badlogins Number of incorrect security password attempts.

security-mode Firmware security level (options: none, command, or full). If set to command or full, system will prompt for PROM security password. Defaults to none.

security-password Firmware security password (never displayed). Can be set only when security-mode is set to command or full.

example# eeprom security-password=
Changing PROM password:
New password:
Retype new password:

selftest-#megs Metabytes of RAM to test. Ignored if diag-switch? is true. Defaults to 1.

skip-vme-loopback? If true, POST does not do VMEbus loopback tests. Defaults to false.

st-targets Map SCSI tape units (OpenBoot PROM version 1.x only). Defaults to 45670123, which means that unit 0 maps to target 4, unit 1 maps to target 5, and so on.

sunmon-compat? If true, display Restricted Monitor prompt (>). Defaults to false.

testarea One-byte scratch field, available for read/write test. Defaults to 0.

tpe-link-test? Enable 10baseT link test for built-in twisted pair Ethernet. Defaults to true.

ttya-mode TTYA (baud rate, #bits, parity, #stop, handshake).
Defaults to 9600,8,n,1,−.

Fields, in left-to-right order, are:

baud rate: 110, 300, 1200, 4800, 9600...

data bits: 5, 6, 7, 8

parity: n(none), e(even), o(odd), m(mark), s(space)

stop bits: 1, 1.5, 2

handshake: −(none), h(hardware:rts/cts), s(software:xon/xoff)

ttyb-mode TTYB (baud rate, #bits, parity, #stop, handshake).
Defaults to 9600,8,n,1,−.

Fields, in left-to-right order, are:

baud rate: 110, 300, 1200, 4800, 9600...

data bits: 5, 6, 7, 8

stop bits: 1, 1.5, 2

parity: n(none), e(even), o(odd), m(mark), s(space)

handshake: −(none), h(hardware:rts/cts), s(software:xon/xoff)

ttya-ignore-cd If true, operating system ignores carrier-detect on TTYA. Defaults to true.

ttyb-ignore-cd If true, operating system ignores carrier-detect on TTYA. Defaults to true.

ttya-rts-dtr-off If true, operating system does not assert DTR and RTS on TTYA. Defaults to false.

ttyb-rts-dtr-off If true, operating system does not assert DTR and RTS on TTYB. Defaults to false.

use-nvramrc? If true, execute commands in NVRAMRC during system start-up. Defaults to false.

version2? If true, hybrid (1.x/2.x) PROM comes up in version 2.x. Defaults to true.

watchdog-reboot? If true, reboot after watchdog reset. Defaults to false.

EXAMPLES

The following example demonstrates the method for changing from one to two the number of megabytes of RAM that the system will test.

example# eeprom selftest-#megs
selftest-#megs=1
example# eeprom selftest-#megs=2
example# eeprom selftest-#megs
selftest-#megs=2

The following example demonstrates the method for setting the auto-boot? parameter to true.

example# eeprom auto-boot?=true

When the eeprom command is executed in user mode, the parameters with a trailing question mark (?) need to be enclosed in double quotation marks (" ") to prevent the shell from interpreting the question mark. Preceding the question mark with an escape character (\) will also prevent the shell from interpreting the question mark.

example% eeprom "auto-boot?"=true

FILES

/dev/openprom device file

/usr/platform/platform-name/sbin/eeprom
platform-specific version of eeprom. To obtain platform-name, use uname −i.

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
Availability	SUNWcsu

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