yusuf 
Does anybody has an example of non-os nand-power-on working code?
stupid question, I am getting bored.
From supervivi menu
Select [a] - absolute user application.
It loads application into RAM first then it writes to nand.
when we power switch off-on, application is not working.
The code is working from RAM. In supervivi [d]- Download & Run
The applicatin is less than 4k.
What is wrong?
In Keil examples:
The 2-nd level Bootloader for 'S3C2440'
This is a 2-nd level bootloader for 'Samsung S3C2440'
microcontroller with NAND Flash and External SDRAM.
It downloads to BANK 0 of NAND Flash.
1-st level bootloader that is in ROM of S3C2440
first downloads this 2-nd level bootloader to
internal RAM and starts it.
2-nd level bootloader's main function is to copy the
user program from NAND Flash to External SDRAM and
start it.
Clock Settings:
- XTAL = 12 MHz
- FCLK = MPLL = 300 MHz
- UCLK = UPLL / 2 = 48 MHz
- HCLK = FCLK / 3 = 100 MHz
- PCLK = HCLK / 2 = 50 MHz
Just select 'Flash -> Download', to download it
to NAND Flash.
Note: Bad block skipping is supported
Error correction (ECC) is not used.
NAND Flash Organization (64MB NAND Flash):
0x00000000 _ ____________________________
| |
| 2-nd Level Bootloader |
| |
0x00001000 -| - - - - - - - - - - - - - -|
| |
: Reserved for future use :
: :
| |
0x00004000 -|============================|
| |
| User Program |
: :
: :
0x04000000 _|____________________________|