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reprogram my bios chip

Posted: Wed Jun 15, 2005 11:11 pm
by frederik
hey,

i've got an portable (compaq presario 2100), but the upgrading of my bios failed. the computer was completely dead.
so i soldered out my bios chip and i want to replace it with a new chip
(i think the old one was broken)
i"ve got the data-file for reprogram it. so i am going to reprogram my bios with my microcontroller.
now my question is, on wich adres in the bios chip do i begin to write?
is it from the first memory adress or from another adres?
thanks

Posted: Thu Jun 16, 2005 9:53 pm
by Sharedoc
The size of the bios image should match the size of the EEPROM chip. If the size is different, then you are in trouble.

Posted: Fri Jun 17, 2005 11:32 am
by frederik
the size is no problem,

but i don't know from wich adress i must begin to write?
is it just from adres 00H?

Posted: Sun Jun 19, 2005 11:20 am
by Sharedoc
If size is right, then there is no other alternative than 00H.

Posted: Mon Jun 20, 2005 4:19 pm
by KenH
I was of the opinion that the comcrap & HP computers could be flashed
by switching the switch 1 to on & the bios update on the floppy left in
the drive, it just ran without the graphics & beeped so many times when
the flash was done.
Been a while but i'm sure I bought one back to life that way when I found
the destructions on the HP web sight.
Don't shoot me if i'm wrong though, it was about 5 years ago.

Posted: Mon Oct 24, 2005 5:37 pm
by frederik
the problem is that i don't have a floppy disk on my notebook,
is it also possible to flash my bios from the cdrom drive

Posted: Mon Oct 24, 2005 5:40 pm
by frederik
i have now a new problem,

i let my bios chip reprogram and solderd back on my motherboard,
but if i plug on the ac adapter the notebook immediatly start up, and stops immediatly with booting,
just the on/off led begins to blink. and i do not know what that means that blinking, and the unhelpful people at hp doesn't know eather (very strange, they build the systems but don't know what is does)