root@talos:~/powerpc-utils # dd if=/tmp/nvram.dump of=/dev/nvram bs=64k conv=sync
9+0 records in
9+0 records out
589824 bytes transferred in 5.060610 secs (116552 bytes/sec)
root@talos:~/powerpc-utils # src/nvram -v --print-config
NVRAM size 589824 bytes
NVRAM contains 4 partitions
"common" Partition
---------------------
petitboot,bootdevs=network any 
petitboot,console=/dev/hvc0 [IPMI / Serial]
auto-boot?=false

root@talos:~/powerpc-utils # src/nvram -p common --update-config jhibbits-driver=working
root@talos:~/powerpc-utils # src/nvram -v --print-config
NVRAM size 589824 bytes
NVRAM contains 4 partitions
"common" Partition
---------------------
petitboot,bootdevs=network any 
petitboot,console=/dev/hvc0 [IPMI / Serial]
auto-boot?=false
jhibbits-driver=working

root@talos:~/powerpc-utils # hexdump -C /dev/nvram 
00000000  51 b5 01 00 69 62 6d 2c  73 6b 69 62 6f 6f 74 00  |Q...ibm,skiboot.|
00000010  6c 6f 67 2d 6c 65 76 65  6c 2d 64 72 69 76 65 72  |log-level-driver|
00000020  3d 37 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |=7..............|
00000030  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
00001000  70 0c 10 00 63 6f 6d 6d  6f 6e 00 00 00 00 00 00  |p...common......|
00001010  70 65 74 69 74 62 6f 6f  74 2c 62 6f 6f 74 64 65  |petitboot,bootde|
00001020  76 73 3d 6e 65 74 77 6f  72 6b 20 61 6e 79 20 00  |vs=network any .|
00001030  70 65 74 69 74 62 6f 6f  74 2c 63 6f 6e 73 6f 6c  |petitboot,consol|
00001040  65 3d 2f 64 65 76 2f 68  76 63 30 20 5b 49 50 4d  |e=/dev/hvc0 [IPM|
00001050  49 20 2f 20 53 65 72 69  61 6c 5d 00 61 75 74 6f  |I / Serial].auto|
00001060  2d 62 6f 6f 74 3f 3d 66  61 6c 73 65 00 6a 68 69  |-boot?=false.jhi|
00001070  62 62 69 74 73 2d 64 72  69 76 65 72 3d 77 6f 72  |bbits-driver=wor|
00001080  6b 69 6e 67 00 00 00 00  00 00 00 00 00 00 00 00  |king............|
00001090  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
00011000  a0 4f 00 fb 6c 6e 78 2c  6f 6f 70 73 2d 6c 6f 67  |.O..lnx,oops-log|
00011010  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
00011fb0  7f 9c 7e 05 77 77 77 77  77 77 77 77 77 77 77 77  |..~.wwwwwwwwwwww|
00011fc0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
00090000