Q: How do I determine the version of Open Firmware
in my machine?
A: The "/openprom" node describes the
implementation of Open Firmware in the machine. The
"model" property of this node describes the
manufacturer and revision level of firmware. Note that this
property is a manufacturer-dependant string. See IEEE Std
175-1994, pg. 160, "model" for details.
There are several ways to find out the version of
Open Firmware in your machine:
User visible methods:
- When you enter the OFUI (by holding down
Command-Option-O-F), the version is displayed at the top of the
screen.
- In the Open Firmware device-tree the node
/openprom describes the implementation of Open
Firmware. Type "dev /openprom .properties" at
the OFUI command prompt. The model property in
this node describes the revision level of firmware. See
IEEE Std 1275-1994, section 3.5 "Standard system nodes"
for a full description.
- In Mac OS run, Display Name Registry and look at the
model property in the node
Devices:device-tree:openprom.
Programmatically:
- In a Mac OS application, you can search the Name
Registry for the node named "openprom" using
RegistryEntrySearch. Once you find this node, use
RegistryPropertyGet to retrieve the value of the
model property.
- In an
FCode driver, you can use find-package
to get a phandle for the openprom package.
Once you have the phandle you can use
get-package-property to get the value of the
model property:
" /openprom" find-package
if " model" rot get-package-property
0= if \ here we have the value of the model property on the
stack as (addr len)
else cr ." Can't find model property"
then
else cr ." Can't find openprom node"
then
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