Hardware info in Mac Mini G4

[Mathieu Malaterre <malat@debian.org>]

Just for posterity, I realized that system_profiler and /sys do not
provide exactly the same representation for the same information. For
comparison:


system_profiler:

  Boot ROM Version: 4.8.9f4
  Serial Number: YM5306NSTYX

But:

$ hexdump -C "/sys/firmware/devicetree/base/rom@ff800000/boot-rom@fff00000/BootROM-version"
00000000  24 30 30 30 34 2e 38 39  66 34 00                 |$0004.89f4.|
0000000b

$ hexdump -C "/sys/firmware/devicetree/base/serial-number"
00000000  54 59 58 00 00 00 00 00  00 00 00 00 00 59 4d 35  |TYX..........YM5|
00000010  33 30 36 4e 53 54 59 58  00 00 00 00 00 00 00 00  |306NSTYX........|
00000020  00 00 00 00 00 00 00 00  00 00 00                 |...........|
0000002b