Appendix D OpenBoot Firmware D-9
D.8 Configuration Variables
Configuration variables are used by the OBP code and are stored in NVRAM. The
following is a sample of the output when the printenv command is entered at the
ok prompt. The setenv command is used to modify the environment variables
TABLE D-2 NVRAM Configuration Variables
Parameter Default Description
tpe-link-test? true Twisted Pair Ethernet link test
scsi-initiator-id 7 SCSI bus address of host adapter, range 0-f.
keyboard-click? false If true, enable keyboard click.
keymap no default Keymap for custom keyboard.
ttyb-rts-dtr-off false If true, OS does not assert DTR and runs on TTYB.
ttyb-ignore-cd true If true, OS ignores TTYB carrier-detect.
ttya-rts-dtr-off false If true, OS does not assert DTR and runs on TTYA.
ttya-ignore-cd true If true, OS ignores TTYA carrier-detect.
ttyb-mode 9600,8,n,1,- TTYB (baud, #bits, parity, #stop, handshake).
ttya-mode 9600,8,n,1,- TTYA (baud, #bits, parity, #stop, handshake).
pcia-probe-list 1,2,3,4 See Para F.12
pcib-probe-list 1,2,3,4 See Para F.12
mfg-mode off
diag-level max Level of diagnostics to run (min or max).
#power-cycles
system-board-serial#
system-board-date 34883686
last-poweroff-cause 0,1,2,3 etc. ASM. See Para F.2.3
env-monitor disabled* ASM (enabled-with-fans, enabled, disabled,
disabled*). See Para F.16
fcode-debug? false If true, include name fields for plug-in device FCodes.
output-device screen Console output device (usually screen, ttya or ttyb).
input-device keyboard Console input device (usually keyboard, ttya or ttyb).
load-base 16384
boot-command boot Command that is executed if auto-boot? is true.
auto-boot? true If true, boot automatically after power-on reset.
watchdog-reboot? false If true, reboot after watchdog reset.
diag-file empty string File from which to boot in diagnostic mode.
diag-device disk net Device from which to boot.
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