Uboot Questions

[malik]

hello,

i tried out pdaxrom r121 and have problems to get back to a sharp rom
using a nand backup. how can i get into the diognostic menu? d+m+reset
does not work. everything with reset seems to boot uboot.

in the beginning i had problems similar to

https://www.oesf.org/forums/index.php?showtopic=21802

but i dont think that it is an sd card issue and i dont see the dm mode.

thanx, malik

p.s. pdaxrom is down again.

[louigi600]

According to some people on some devices the D+M menu is bothe on flash and rom:
D+M+reset = load diag menu from flash
Fn+D+M+reset = load diag menu from rom

Can you try the Fn+D+M+reset before restoring the original boot loader stuff?
Bufore stating that it's not working make sure you also try this:
remove battery and power adapter
pres and hold Fn+D+M
while still pressing the buttons insert the power adapter ...


There is a restore procedure for the diag menu:
1) put a copy of the originan NAND BACKUP on a CF or CD (something like SYST<model>.DBK). If you do not have one you can get it from http://trisoft.de/en_downloads.htm
2)boot the emergency system (press OK while power on)
3) insert the device where you have the nand backup and cd to where ever that is
4) nandlogical /dev/mtd1 WRITE 0x00000000 0x000DBFFF <your nand backup>
replacing <your nand backup> with the name of the original sharp nand backup.
Your done with just the boot loader and other flash menus ... not not the OS yet.

You're not using a c760 I bet  ? ... on the 760 the D+M menu does not get overwritten.

[malik]

very fast answer louigi, but not fast enough:-) meanwhile i found

https://www.oesf.org/forums/lofiversion/ind...php/t21537.html

i.e. fn+d+m+inserting power adapter and restored cacko rom, now i can read the
rest of your answer.

a pinned thread concerning this or a textfile which is distributed with uboot would
be nice.

thanx louigi