Tiny Core Linux

Tiny Core Extensions => TCE Talk => Topic started by: Daniel on September 20, 2011, 05:57:23 AM

Title: modprobe nvram
Post by: Daniel on September 20, 2011, 05:57:23 AM

In order to manage Bios parameters, i need to access to the nvram.

is it possible with TC ?

Thanks
Daniel.

Title: Re: modprobe nvram
Post by: maro on September 20, 2011, 07:55:06 AM

I guess it depends what you mean with "access". Just for "fun" you could probably read some contents with commands like:

Code: [Select]

tc@box:~$ hexdump -vC /dev/nvram
00000000  00 00 00 00 00 00 0e 80  02 ff ff 00 00 00 00 00  |................|
00000010  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000020  02 8e ff ff 20 00 00 07  00 20 20 00 00 00 00 31  |.... ....  ....1|
00000030  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000040  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000050  00 00 01 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000060  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000070  00 00                                             |..|
00000072
tc@box:~$ cat /proc/driver/nvram
Checksum status: valid
# floppies     : 0
Floppy 0 type  : none
Floppy 1 type  : none
HD 0 type      : none
HD 1 type      : none
HD type 48 data: 0/0/0 C/H/S, precomp 0, lz 0
HD type 49 data: 7/32/0 C/H/S, precomp 32, lz 0
DOS base memory: 640 kB
Extended memory: 65535 kB (configured), 65535 kB (tested)
Gfx adapter    : EGA, VGA, ... (with BIOS)
FPU            : installed
tc@box:~$There are certainly some other tools, but I just could not be bothered to use goggle to find out more.

Title: Re: modprobe nvram
Post by: Daniel on September 20, 2011, 08:07:59 AM

Thank you Maro!!!

In fact, i'm using flashrom for BIOS update.
I was reading http://www.pixelbeat.org/docs/bios/ (http://www.pixelbeat.org/docs/bios/)

I've got a program for nvram bios param update, but it doesn't run directly when i update from bios V1.00 to V2.20 (need reboot).
with that, i expect beeing able to do all in one boot!

Daniel.

PS: concerning flashrom, i've got flash erase pb (many case (and long time) to erase all flash).
But after, flashing BIOS is ok!

Title: Re: modprobe nvram
Post by: Daniel on September 20, 2011, 12:21:31 PM

I make a flasrom modification!
It seems to run now :)

Daniel.