Listing 1. Environment Variables and Their Defaults from theG4's Open Fireware

0 > printenv
------------ Partition: common --- Signature: 0x70 --
little-endian?          false           false
real-mode?              false           false
auto-boot?              true            true
diag-switch?            false           false
fcode-debug?            false           false
oem-banner?             false           false
oem-logo?               false           false
use-nvramrc?            false           false
use-generic?            false           false
default-mac-address?    false           false
real-base               -1              -1
real-size               -1              -1
load-base               0x800000        0x800000
virt-base               -1              -1
virt-size               -1              -1
pci-probe-mask          -1              -1
screen-#columns         100             100
screen-#rows            40              40
selftest-#megs          0               0
boot-device /pci@f2000000/pci-bridge@d/mac-io@7/ata

boot-file
boot-screen
console-screen
diag-device             enet            enet
diag-file               ,diags          ,diags
input-device            keyboard        keyboard
output-device           screen          screen
input-device-1          scca            scca
output-device-1         scca            scca
mouse-device            mouse           mouse
oem-banner
oem-logo
nvramrc
boot-command            mac-boot        mac-boot
default-client-ip
default-server-ip
default-gateway-ip
default-subnet-mask
default-router-ip
boot-script
aapl,pci                Use PRINT-AAPL,PCI to view
ASVP                    30313037 31373030 32353935
 ok